WO2000037590A1 - Process for the production of improved diesel fuels using reclaimed hydraulic oil - Google Patents

Process for the production of improved diesel fuels using reclaimed hydraulic oil Download PDF

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Publication number
WO2000037590A1
WO2000037590A1 PCT/US1999/029642 US9929642W WO0037590A1 WO 2000037590 A1 WO2000037590 A1 WO 2000037590A1 US 9929642 W US9929642 W US 9929642W WO 0037590 A1 WO0037590 A1 WO 0037590A1
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WIPO (PCT)
Prior art keywords
oil
weight percent
diesel fuel
hydraulic oil
pumping
Prior art date
Application number
PCT/US1999/029642
Other languages
French (fr)
Inventor
Ron Waters
Original Assignee
Ron Waters
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ron Waters filed Critical Ron Waters
Priority to AU31210/00A priority Critical patent/AU3121000A/en
Publication of WO2000037590A1 publication Critical patent/WO2000037590A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
    • C10G31/09—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by filtration
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
    • C10L1/08—Liquid carbonaceous fuels essentially based on blends of hydrocarbons for compression ignition

Definitions

  • the present invention relates to the production of diesel fuels from waste oils and, more particularly, to a process for producing highly efficient diesel fuels employing a high concentration of reclaimed oils including hydraulics as feedstock.
  • U.S. Patent No. 3,346,483 discloses a method of re-refining waste lubricating oils by admixing the used oils with sulfuric acid and subsequently distilling, i.e., hydrogenating the admixture at 40 atm pressure and a temperature of
  • U.S. Patent No. 4,784,751 to McGhee discloses a method and apparatus for recovering contaminated crank case or other heavy oils by pumping the material through a filter and into a divided tank.
  • the method according to Montegari comprises pumping fuel oil via a primary pump at a first flow rate and waste lubrication oil at a second flow rate via a secondary pump through a pair of filters under pressure into a
  • pressures i.e., room temperature and standard pressures.
  • Another object of the present invention relates to the elimination of chemical processing such as acid degradation and distillation to achieve a useful reclaimed oil for use in formulating an improved diesel fuel.
  • the process for the production of upgraded diesel fuels includes the steps of: a) reclaiming a volume of used oil having a water content of no
  • used oil an oil composition including less than 0.5 weight percent water, used crankcase oil and at least 10.0 weight percent
  • fuel oil an oil selected from the group consisting of diesel fuels (grade 1 and 2), furnace oils (grade 1 and 2), stove oils (grade 1 and 2)
  • nominal filters filters having an average porosity of 5.0 microns or more.
  • absolute filters filters having an average porosity of less than about 5.0 microns to about 0.1 microns.
  • finite filter it is meant a filter having an average porosity of less than 0.1 microns.
  • upgraded diesel fuel it is meant a fuel having a cetane number of at least 35 capable of use in an internal combustion engine operating on a thermodynamic cycle.
  • Figure 1 is a schematic view of the apparatus utilized to carry out a process of the present invention
  • Figure 2 is a schematic view of a second apparatus utilized to carry out a process of the present invention.
  • the apparatus 10 generally comprises a first fluid line 12 including a first pump 18 fluidly coupled to a source 16 of used oil including at least 10.0 weight percent hydraulic oil, a water removal filter 20, a plurality of nominal
  • the used oil composition employed in the process of the invention may be 100.0 weight percent used hydraulic oil but, more preferably, the used oil will be an admixture of used crankcase oil and used hydraulic oil wherein the admixture includes less than 0.5 weight percent water.
  • the used crankcase oil may be obtained from a number of sources including manufacturing plants, airlines, automotive repair centers and instant oil change shops, among others.
  • the hydraulic oil component of the used oil admixture can be obtained from various machinery including, but not limited to, automatic and standard transmissions, heavy equipment transmissions, elevators, hydraulic pumps,
  • Used hydraulic oils preferably have a kinemac viscosity of between about 30 cSt to about 120 cSt at 40°C.
  • the water removal filter 20 which generally has an average porosity of between about 1.0 to about 5.0 microns is available commercially from a
  • the so-called nominal filters 22 are preferably in the form of bag filters
  • Bag filters are commercially available from a variety of sources such as Great Lakes Filters, Inc. of Illinois or GAF Filter Bags, Inc. of Georgia, for example. Bag filters provide numerous advantages over standard pleated filters such as ease in installation, a greater surface area for filtering and ease in disposal as the used filters can be sold for industrial use. Additionally, bag filters allow for easy visual inspection to determine whether replacement is necessary.
  • the apparatus 10 also includes a second fluid line 14 including a pump
  • fuel oil as the term is used herein includes diesel fuel, furnace oil, stove oil and mixtures thereof.
  • a finite filter 44 capable of
  • a source of additives may be incorporated into the apparatus by introducing certain additives directly into the mixing tank 34, by introducing the additives downstream beyond the finite filter or by a combination thereof.
  • the additives may
  • viscosity enhancers such as paint thinners, for example, cetane improvers such as esters of azotic acid, detergents, corrosion inhibitors and anti-foaming agents. It should be noted that while such additives may be incorporated, additives are not considered essential since the composition of the final diesel fuel 48 tends to have equal or greater fuel efficiency than diesel fuels which are purchased at the pump.
  • FIG. 2 a second apparatus 110 utilized to produce upgraded diesel fuels in accordance with the process of the present invention as illustrated.
  • crankcase oil 124 and the used hydraulic oil 116 are supplied to the mixing tank 134 in separate streams under the apparatus 110.
  • the apparatus 110 as illustrated in Figure 2 includes a first fluid line 112 including a first pump 118 fluidly coupled to a source 116 of
  • the nominal filters are preferably in the form of bag filters arranged in order of successively decreasing average porosity.
  • the apparatus 110 also includes a second fluid line 122 including a
  • pump 126 fluidly coupled to a source of used crankcase oil 124 and a plurality of nominal filters 128 positioned between the pump 126 and the junction 152 of fluid lines 112 and 122, respectively.
  • a water removal filter 150 is provided in line between the junction 152 and the mixing tank 134 to reduce the water content well below the 0.5 weight percent which may be present in the used crankcase and hydraulic oil streams.
  • a third fluid line 114 which is fluidly coupled to a source 130 of fuel oil and transported via pump 132 to the mixing tank 134 is also provided.
  • a lead away line 138 Positioned along the lead away line 138 is pump 140 for transporting the raw blend of reclaimed crankcase, hydraulic and fuel oils through a plurality of absolute filters 142 designed to remove impurities in a systematic manner.
  • the plurality of absolute filters 142 are designed to remove impurities in a systematic manner.
  • the plurality of absolute filters 142 are designed to remove impurities in a systematic manner.
  • used crankcase oil more preferably 40.0 weight percent to about 75.0 weight percent used crankcase oil; 15.0 weight percent to about 30.0 weight percent fuel oil; and up to about 5.0 weight percent additives an upgraded diesel fuel capable of use in an internal combustion engine operating on a thermodynamic cycle is obtained.
  • the sum weight percent of all components will always equal 100.0 weight percent.

Abstract

A process for producing upgraded diesel fuel includes blending reclaimed used oil including a certain amount of hydraulic oil with a fuel oil to give a composition offering improved fuel efficiency over diesel fuels purchased at the pump.

Description

PROCESS FOR THE PRODUCTION OF IMPROVED DIESEL FUELS USING RECLAIMED HYDRAULIC OIL
Background of the Invention
The present invention relates to the production of diesel fuels from waste oils and, more particularly, to a process for producing highly efficient diesel fuels employing a high concentration of reclaimed oils including hydraulics as feedstock.
As a direct result of environmental regulations relating to the containment and disposal of waste lubricating oils, methods and apparatus
directed to the reclamation of waste oils have been developed. For example, U.S. Patent No. 3,346,483 discloses a method of re-refining waste lubricating oils by admixing the used oils with sulfuric acid and subsequently distilling, i.e., hydrogenating the admixture at 40 atm pressure and a temperature of
360° C in the presence of a catalyst to obtain certain fractions.
More recently, U.S. Patent No. 5,141 ,628 describes a method of
cleaning and regenerating used oils heating the used oils, after rough filtering, to a temperature of 50° C to 100° C and adding thereto a solution of 0.5 to
2.5 weight percent alkali water glass solution having a water content of 30.0 to 70.0 weight percent and a polyalkylene glycol. The solution is allowed to
settle at which time they are separated. No specific information is provided regarding the end use of the regenerated materials. Until recently, processes employing the reclaimed oils have apparently not received much attention. Further, of the few known patents which relate to the use of reclaimed oils in forming diesel fuels, the known references are considered to be unduly complicated or require necessary treatment steps, among other perceived
drawbacks. For example, U.S. Patent No. 4,784,751 to McGhee discloses a method and apparatus for recovering contaminated crank case or other heavy oils by pumping the material through a filter and into a divided tank.
Thereafter, the oil is heated to a temperature of 180° F to vaporize water,
antifreeze and other contaminants and is pumped into a blending tank including a supply of clean diesel fuel. Interestingly, the McGhee patent is specifically directed to small scale operations.
A more elaborate method and apparatus for recycling waste lubrication
oil for reuse as fuel oil is disclosed in U.S. Patent No. 5,507,307 to Montegari et al. The method according to Montegari comprises pumping fuel oil via a primary pump at a first flow rate and waste lubrication oil at a second flow rate via a secondary pump through a pair of filters under pressure into a
static mixer at carefully controlled rates. The two oils are then blended together under pressure and fed through a coalescer filter to dehydrate the blend. In contrast to the foregoing, it is an object of the present invention to provide a simplified method of producing diesel fuels using reclaimed oils. It is another object to provide a system for producing improved diesel fuels wherein the system is fully operational at ambient temperatures and
pressures, i.e., room temperature and standard pressures.
Another object of the present invention relates to the elimination of chemical processing such as acid degradation and distillation to achieve a useful reclaimed oil for use in formulating an improved diesel fuel.
It is yet another object of the present invention to provide a cost effective method and apparatus for the production of diesel fuels from reclaimed oils. In accordance with the foregoing objects, among others, the process for the production of upgraded diesel fuels includes the steps of: a) reclaiming a volume of used oil having a water content of no
more than about 0.5 weight percent and at least 10.0 weight percent of used hydraulic oil by pumping said used oil through a plurality of nominal filters; b) pumping said reclaimed oil through a water removal filter into a mixing tank;
c) pumping a volume of fuel oil having a water content of no more than about 0.5 weight percent into said mixing tank to form a raw used oil blend; and d) pumping said raw blend through a series of filters including at
least one sub-micron filter capable of removing dyes from said raw blend; whereby a diesel fuel capable of use in an internal combustion engine operating on a thermodynamic cycle is obtained. By "used oil", it is meant an oil composition including less than 0.5 weight percent water, used crankcase oil and at least 10.0 weight percent
used hydraulic oil- By "fuel oil", it is meant an oil selected from the group consisting of diesel fuels (grade 1 and 2), furnace oils (grade 1 and 2), stove oils (grade
1 and 2) and mixtures thereof.
By "nominal filters", it is meant filters having an average porosity of 5.0 microns or more.
By "absolute filters", it is meant filters having an average porosity of less than about 5.0 microns to about 0.1 microns.
By "finite filter", it is meant a filter having an average porosity of less than 0.1 microns.
By "upgraded diesel fuel", it is meant a fuel having a cetane number of at least 35 capable of use in an internal combustion engine operating on a thermodynamic cycle.
The general features, advantages and objects of the present invention
will be further understood and appreciated by those skilled in the art by reference to the following specification, claims and appended drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic view of the apparatus utilized to carry out a process of the present invention; and Figure 2 is a schematic view of a second apparatus utilized to carry out a process of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Figure 1 , the apparatus 10 utilized to produce upgraded diesel fuels in accordance with the process of the present invention is
illustrated.
The apparatus 10 generally comprises a first fluid line 12 including a first pump 18 fluidly coupled to a source 16 of used oil including at least 10.0 weight percent hydraulic oil, a water removal filter 20, a plurality of nominal
filters 22, with the fluid line 12 terminating at mixing tank 34. The used oil composition employed in the process of the invention may be 100.0 weight percent used hydraulic oil but, more preferably, the used oil will be an admixture of used crankcase oil and used hydraulic oil wherein the admixture includes less than 0.5 weight percent water. The used crankcase oil may be obtained from a number of sources including manufacturing plants, airlines, automotive repair centers and instant oil change shops, among others. The hydraulic oil component of the used oil admixture can be obtained from various machinery including, but not limited to, automatic and standard transmissions, heavy equipment transmissions, elevators, hydraulic pumps,
aircraft and marine transmissions, medical equipment and printing press transmissions, by way of non-limiting example. Used hydraulic oils, as used herein, preferably have a kinemac viscosity of between about 30 cSt to about 120 cSt at 40°C.
The water removal filter 20 which generally has an average porosity of between about 1.0 to about 5.0 microns is available commercially from a
variety of sources including Perfect Filtration, Inc. of Tampa, Florida.
The so-called nominal filters 22 are preferably in the form of bag filters
which are generally encased in wire mesh. Bag filters are commercially available from a variety of sources such as Great Lakes Filters, Inc. of Illinois or GAF Filter Bags, Inc. of Georgia, for example. Bag filters provide numerous advantages over standard pleated filters such as ease in installation, a greater surface area for filtering and ease in disposal as the used filters can be sold for industrial use. Additionally, bag filters allow for easy visual inspection to determine whether replacement is necessary.
The apparatus 10 also includes a second fluid line 14 including a pump
32 fluidly coupled to a source 30 of fuel oil for transmitting the fuel oil into the mixing tank 34. As noted, fuel oil as the term is used herein includes diesel fuel, furnace oil, stove oil and mixtures thereof.
Beyond the plurality of absolute filters 42, is a finite filter 44 capable of
removing sub-micronic impurities including, for example, dyes contained in the used hydraulic oil. These so-called finite filters which preferably are formed from polymeric membranes are commercially available from a variety of sources such as Liumar Technologies Corp. of Ottawa, Canada, by way of non-limiting example. Optionally, a source of additives may be incorporated into the apparatus by introducing certain additives directly into the mixing tank 34, by introducing the additives downstream beyond the finite filter or by a combination thereof. By way of non-limiting example, the additives may
include viscosity enhancers such a paint thinners, for example, cetane improvers such as esters of azotic acid, detergents, corrosion inhibitors and anti-foaming agents. It should be noted that while such additives may be incorporated, additives are not considered essential since the composition of the final diesel fuel 48 tends to have equal or greater fuel efficiency than diesel fuels which are purchased at the pump.
Referring to Figure 2, a second apparatus 110 utilized to produce upgraded diesel fuels in accordance with the process of the present invention as illustrated.
In contrast to the apparatus of Figure 1 , the used crankcase oil 124 and the used hydraulic oil 116 are supplied to the mixing tank 134 in separate streams under the apparatus 110. Often the used oils, i.e., crankcase and
hydraulic, are obtained from different sources wherein it is more practical to add them separately in a predetermined volume to the mixing tank, rather
than having to analyze and reformulate the admixture each time a slightly different batch is desired.
As such, the apparatus 110 as illustrated in Figure 2 includes a first fluid line 112 including a first pump 118 fluidly coupled to a source 116 of
used hydraulic oil and a plurality of nominal filters 120. Again, the nominal filters are preferably in the form of bag filters arranged in order of successively decreasing average porosity.
The apparatus 110 also includes a second fluid line 122 including a
pump 126 fluidly coupled to a source of used crankcase oil 124 and a plurality of nominal filters 128 positioned between the pump 126 and the junction 152 of fluid lines 112 and 122, respectively. Preferably a water removal filter 150 is provided in line between the junction 152 and the mixing tank 134 to reduce the water content well below the 0.5 weight percent which may be present in the used crankcase and hydraulic oil streams. A third fluid line 114 which is fluidly coupled to a source 130 of fuel oil and transported via pump 132 to the mixing tank 134 is also provided.
Extending from the mixing tank, preferably above the holding tank drain
136, is a lead away line 138. Positioned along the lead away line 138 is pump 140 for transporting the raw blend of reclaimed crankcase, hydraulic and fuel oils through a plurality of absolute filters 142 designed to remove impurities in a systematic manner. Preferably, the plurality of absolute filters
will be arranged such that the average porosity of each filter becomes successively smaller.
Upon mixing and filtering the raw blend wherein the components range from about 10.0 weight percent to about 100.0 weight percent of used hydraulic oil, more preferably 10.0 weight percent to about 30.0 weight percent used hydraulic oil; 0.0 weight percent to about 75.0 weight percent
used crankcase oil, more preferably 40.0 weight percent to about 75.0 weight percent used crankcase oil; 15.0 weight percent to about 30.0 weight percent fuel oil; and up to about 5.0 weight percent additives an upgraded diesel fuel capable of use in an internal combustion engine operating on a thermodynamic cycle is obtained. As should be understood by those skilled in the art, regardless of whether a certain quantity of used crankcase oil or additives are employed, the sum weight percent of all components will always equal 100.0 weight percent.
In view of the detailed explanation of the apparatuses utilized to carry out the processes for producing upgraded diesel fuel in accordance with the present invention, a summary of various preferred formulations will now be presented in Table I.
Upon mixing various formulations as set forth in Table I, a single piston internal combustion engine operating on a thermodynamic cycle was employed to test the fuel efficiency of the various compositions as compared to fresh diesel fuel purchased at the pump. Since each test was conducted at room temperature and standard atmospheric pressures, the amount of time
the engine ran for a particular sample of fuel was used as the standard for determining fuel efficiency. The engine employed which was supplied by
Kubota Ltd. of Osaka, Japan had a displacement of 12.9 cubic inches, a gross output of 4.4 horsepower at 2600 rpm, 3.3 k.w. 43.3/rs, and an initial
output of 4.0 horsepower at 2600 rpm, 3.3 k.w. 43.3/rs. TABLE
Figure imgf000012_0001
* additive employed is a high concentrate paint thinner
As demonstrated by the formulations presented in Table I, it appears that the formulation numbers 3 - 7 offered the best results in terms of fuel efficiency.
In addition to affording enhanced fuel efficiency over diesel fuel purchased at the pump, the engine seemed to run more quietly than the upgraded diesel fuels of the present invention. Further, the exhaust temperature was cooler for the upgraded diesel fuels versus the diesel fuel purchased at the pump, thus indicating less wear and tear occurring internally with the engine. While the above detailed description describes the preferred embodiment of the present invention, it should be understood that the present invention is susceptible to modification, variation and alteration without deviating from the scope and fair meaning of the following claims.

Claims

WHAT IS CLAIMED IS:
1. A process for the production of upgraded diesel fuels including
the steps of: a) reclaiming a volume of used oil including at least 10.0 weight
percent of used hydraulic oil by pumping said used oil through a plurality of nominal filters; b) pumping said reclaimed oil through a water removal filter into a mixing tank; c) pumping a volume of fuel oil into said mixing tank to form a raw used oil blend; and d) pumping said raw blend through a series of filters including at least one finite filter capable of removing dyes from said raw blend; whereby an upgraded diesel fuel capable of use in an internal combustion engine operating on a thermodynamic cycle is obtained.
2. The process of Claim 1 wherein said volume of used oil has a water content of no more than about 0.5 weight percent.
3. The process of Claim 2 wherein said used oil comprises an admixture of used crankcase oil and used hydraulic oil.
4. The process of Claim 3 wherein said used crankcase oil and said used hydraulic oil are premixed prior to pumping said used oil through said plurality of nominal filters.
5. The process of Claim 3 wherein said used crankcase oil and said used hydraulic oil are supplied via separate fluid lines to a junction leading to said mixing tank.
6. The process of Claim 3 wherein said upgraded diesel fuel includes between about 60.0 weight percent to about 85.0 weight percent reclaimed oil.
7. The process of Claim 3 wherein said admixture of used oil includes between about 10.0 weight percent and 40.0 weight percent hydraulic oil.
8. The process of Claim 3 wherein said used hydraulic oil has a kinemac viscosity of between about 30 cSt to about 120 cSt at 40° C.
9. The process of Claim 1 wherein said upgraded diesel fuel includes between about 15.0 weight percent to 30.0 weight percent fuel oil.
10. The process of Claim 1 further comprising the step of introducing at least one additive to said raw blend.
11. The process of Claim 10 wherein said at least one additive
includes a highly concentrated paint thinner.
12. An upgraded diesel fuel comprising: a blend of: a) a reclaimed oil formed from an admixture of used crankcase oil and used hydraulic oil, said reclaimed oil including least about
10.0 weight percent hydraulic oil; and b) a fuel oil composition; whereby said upgrade diesel fuel includes between about 60.0 weight percent to about 85.0 weight percent of said reclaimed used oil.
13. The upgraded diesel fuel of Claim 12 wherein said reclaimed oil
includes no more than about 0.5 weight percent water.
14. The upgraded diesel fuel of Claim 12 wherein said admixture of used oil includes between about 10.0 weight percent and 40.0 weight percent
used hydraulic oil.
15. The upgraded diesel fuel of Claim 12 wherein said used hydraulic oil has a kinemac viscosity of between about 30 cSt to about 120
cSt at 40° C.
16. The upgraded diesel fuel of Claim 12 wherein said upgraded diesel fuel includes between about 15.0 weight percent to 30.0 weight percent
fuel oil.
17. The upgraded diesel fuel of Claim 12 further comprising at least one additive.
18. The upgraded diesel fuel of Claim 17 wherein said at least one additive includes highly concentrated paint thinner.
AMENDED CLAIMS
[received by the International Bureau on 22 May 2000 (22.05.00); original claim 10 amended; original claims 12,14 and 17 amended and renumbered as claims 1 1,13 and 15; original claims 1 1,15 and 18 cancelled; new claims 16- 19 added; original claims 13 and 16 renumbered as claims
12 and 14; remaining claims unchanged (5 pages)]
1. A process for the production of upgraded diesel fuels including
the steps of: a) reclaiming a volume of used oil including at ieast 10.0 weight percent of used hydraulic oil by pumping said used oil through a plurality of
nominal filters; b) pumping said reclaimed oil through a water removal filter into a mixing tank; c) pumping a volume of fuel oil into said mixing tank to form a raw used oil blend; and d) pumping said raw blend through a series of filters including at least one finite filter capable of removing dyes from said raw blend; whereby an upgraded diesel fuel capable of use in an internal combustion engine operating on a thermodynamic cycle is obtained.
2. The process of Claim 1 wherein said volume of used oil has a
water content of no more than about 0.5 weight percent.
3. The process of Claim 2 wherein said used oil comprises an
admixture of used crankcase oil and used hydraulic oil.
4. The process of Claim 3 wherein said used crankcase oil and said used hydraulic oil are premixed prior to pumping said used oil through said plurality of nominal filters.
5. The process of Claim 3 wherein said used crankcase oil and said used hydraulic oil are supplied via separate fluid lines to a junction leading to said mixing tank.
6. The process of Claim 3 wherein said upgraded diesel fuel includes between about 60.0 weight percent to about 85.0 weight percent
reclaimed oil.
7. The process of Claim 3 wherein said admixture of used oil includes between about 10.0 weight percent and 40.0 weight percent
hydraulic oil.
8. The process of Claim 3 wherein said used hydraulic oil has a kinemac viscosity of between about 30 cSt to about 120 cSt at 40° C.
9. The process of Claim 1 wherein said upgraded diesel fuel includes between about 15.0 weight percent to 30.0 weight percent fuel oil.
10. The process of claim 1 further comprising the step of introducing concentrated paint thinner.
11. An upgraded diesel fuel comprising:
a blend of: a) a reclaimed oil formed from an admixture of used crankcase oil and used hydraulic oil, said reclaimed oil including at least about 10.0 weight percent hydraulic oil having a kinemac viscosity of between about 30 cSt to
about 120 cSt at 40°C; and b) a fuel oil composition; whereby said upgrade diesel fuel includes between about 60.0 weight percent to about 85.0 weight percent of said reclaimed used oil.
12. The upgraded diesel fuel of Claim 11 wherein said reclaimed oil includes no more than about 0.5 weight percent water.
13. The upgraded diesel fuel of Claim 11 wherein said admixture of used crankcase oil and used hydraulic oil includes between 10.0 weight
percent and 40.0 weight percent used hydraulic oil.
14. The upgraded diesel fuel of Claim 1 1 wherein said upgraded diesel fuel includes between about 15.0 weight percent to 30.0 weight percent
fuel oil.
15. The upgraded diesel fuel of Claim 11 further comprising concentrated paint thinner.
16. A process for the production of upgraded diesel fuels including
the steps of: a) reclaiming a volume of used oil including at least 10.0 weight
percent of used hydraulic oil having a kinemac viscosity of between about 30 cSt to about 120 cSt at 40°C by pumping said used oil through a plurality of nominal filters; b) pumping said relcaimed oil through a water removal filter into a mixing tank; c) pumping a volume of fuel oil into said mixing tank to form a raw used oil blend; and d) pumping said raw blend through a series of filters including at least one finite filter capable of removing dyes form said raw blend; whereby an upgraded diesel fuel capable of use in an internal
combustion engine operating on a thermodynamic cycle is obtained;
17. The process of Claim 16 wherein said volume of used oil has a water content of no more than about 0.5 weight percent.
18. The process of Claim 17 wherein said oil comprises an
admixture of used crankcase oil and used hydraulic oil.
19. The process of Claim 18 wherein said used crankcase oil and said used hydraulic oil are premixed prior to pumping said used oil through said plurality of nominal filters.
PCT/US1999/029642 1998-12-18 1999-12-13 Process for the production of improved diesel fuels using reclaimed hydraulic oil WO2000037590A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6485632B1 (en) * 2000-08-04 2002-11-26 Michael S. Ward Apparatus and method for reclaiming waste oil for use as fuel for a diesel engine
WO2003033626A2 (en) * 2001-10-16 2003-04-24 Ralph Wong Fuel mixture for compression ignition device
US7828861B1 (en) 2006-12-12 2010-11-09 Ralph Wong Method of forming fuel mixture for compression ignition device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6485632B1 (en) * 2000-08-04 2002-11-26 Michael S. Ward Apparatus and method for reclaiming waste oil for use as fuel for a diesel engine
WO2003033626A2 (en) * 2001-10-16 2003-04-24 Ralph Wong Fuel mixture for compression ignition device
WO2003033626A3 (en) * 2001-10-16 2003-11-20 Ralph Wong Fuel mixture for compression ignition device
US7828861B1 (en) 2006-12-12 2010-11-09 Ralph Wong Method of forming fuel mixture for compression ignition device

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