WO2009002008A1

WO2009002008A1 - The mixing alcohol fuels of high density and method of manufacture

Info

Publication number: WO2009002008A1
Application number: PCT/KR2008/001932
Authority: WO
Inventors: Byong Woo Yoo; Jung Woo Yoo
Original assignee: Vodustm Co., Ltd
Priority date: 2007-06-22
Filing date: 2008-04-04
Publication date: 2008-12-31
Also published as: KR20090003146A; CN101328438A

Abstract

Disclosed is a high density mixed alcohol fuel, which is prepared by using methanol or ethanol as a main material. More particularly, in the disclosed high density mixed alcohol fuel, 35 to 45 wt% of methanol or ethanol, 5 to 7wt% of isopropanol, 5 to 8 wt% of butanol, 15 to 25wt% of toluene, 5 to 10 wt% of non-aromatic raffinate, 5 to 10 wt% of pentane, 15 to 25wt% of naphtha, and 5 to 10 wt% of xylene are sequentially mixed; or 10 to 25 wt% of methanol or ethanol, 4 to 14 wt% of C5, 4 to 14 wt% of mixed oil, 50 to 55wt% of naphtha, 1 to 6wt% of isopropanol, 10 to 15wt% of MTB, 5 to 9wt% of aromatics, and 1 to 7wt% of butanol are sequentially mixed. Accordingly, the fuel can replace conventional gasoline due to a reduced production cost, and can reduce the amount of exhaust gas due to complete combustion of ethanol, thereby achieving an environmental pollution prevention effect. Also, it is possible to directly apply the fuel to a vehicle without changing an inlet device or an inlet port of the vehicle. Also, since the fuel has almost the same output power as gasoline, and a freezing point lower than gasoline, it is possible to maintain start ability of the vehicle, even in a cold environment.

Description

THE MIXING ALCOHOL FUELS OF HIGH DENSITY AND METHOD OF MANUFACTURE

Technical Field

[1] The present invention relates to a high density mixed alcohol fuel, which is prepared by using methanol or ethanol as a main material. More particularly, the present invention relates to a high density mixed alcohol fuel, in which 35 to 45 wt% of methanol or ethanol, 5 to 7wt% of isopropanol, 5 to 8 wt% of butanol, 15 to 25wt% of toluene, 5 to 10 wt% of non-aromatic raffinate, 5 to 10 wt% of pentane, 15 to 25wt% of naphtha, and 5 to 10 wt% of xylene are sequentially mixed, or in which 10 to 25 wt% of methanol or ethanol, 4 to 14 wt% of C5, 4 to 14 wt% of mixed oil, 50 to 55wt% of naphtha, 1 to 6wt% of isopropanol, 10 to 15wt% of MTB, 5 to 9wt% of aromatics, and 1 to 7wt% of butanol are sequentially mixed. Background Art

[2] Compared to gasoline, methanol or ethanol itself has a low freezing point, a high specific gravity, a wide combustion range, and a low calorific value. Thus, when used as a fuel for a vehicle, methanol or ethanol has a disadvantage in that output power is not high. Accordingly, the most fundamental problem in applying methanol to a gasoline vehicle is to reduce the upper flash point of an explosive mixture air to a level of gasoline.

[3] In the present invention, in order to solve the above described problem, butanol and toluene are mixed in a certain ratio. Thus, the upper flash point is reduced to -18⁰C to - 2O⁰C so that stability can be secured, and vapor pressure is adjusted to 0.705kg/cm.

[4] Also, in the present invention, an octane number is increased up to 125 or more, and the emission amount of exhaust gas (which is one of the main worldwide pollution issues) is largely reduced, thereby increasing output power.

[5] Also, in the present invention, since toluene is added, several problems caused by an insufficient calorific value of methanol, such as low output power, low fuel efficiency, and economical inefficiency, may be solved. In addition, a mixed fuel can be completely combusted, and fuel efficiency and economical efficiency may be increased. Also, the complete combustion can largely reduce the emission amount of exhaust gas.

[6] Also, in the present invention, it is possible to solve the problem of low start ability at low temperatures, which is one defect of ethanol. Since butanol is added, the low temperature start ability may be improved, and the freezing point of a fuel may be reduced compared to gasoline so that usability can be higher than gasoline, even in a cold environment. In addition, in a tropical region, the fuel can be used only by changing butanol alcohol to methanol or ethanol and mixing the material in an appropriate ratio.

[7] Also, in order to inhibit separation of a non-aqueous solution and to maintain the stability during prolonged storage, methanol (aqueous) is added, and thus I.P.A (isopropanol) functioning as a surfactant is generated. Accordingly, it is possible to prevent deterioration during storage, reinforce stability, and store the fuel in the same manner as gasoline.

[8] Therefore, in the present invention, methanol or ethanol is mixed with the following chemical materials in a predetermined ratio to achieve a better fuel than gasoline. Disclosure of Invention Technical Problem

[9] Therefore, the present invention relates to a high density mixed alcohol fuel, in which methanol or ethanol as a main material is mixed in a predetermined ratio, thereby generating I.P.A (isopropanol) functioning as a surfactant. Accordingly, the contents of butanol (alcohol) having low temperature start ability, toluene, and modified gasoline are increased, thereby improving explosive power. Technical Solution

[10] The present invention provides a high density mixed alcohol fuel including methanol or ethanol as a main material, in which I.P.A (isopropanol) functioning as a surfactant is generated, thereby increasing thecontent of butanol (alcohol) having low temperature start ability, separating toluene capable of improving explosive power, and achieving -18⁰C to -2O⁰C of the upper flash point.

[11] Preferably, the fuel according to the present invention may include 35 to 45 wt% of methanol or ethanol, 5 to 7wt% of isopropanol, 5 to 8 wt% of butanol, 15 to 25wt% of toluene, 5 to 10 wt% of non-aromatic raffinate, 5 to 10 wt% of pentane, 15 to 25wt% of naphtha, and 5 to 10 wt% of xylene.

[12] Preferably, the fuel according to the present invention may include 10 to 25 wt% of methanol or ethanol, 4 to 14 wt% of pentane, 4 to 14 wt% of mixed oil, 50 to 55wt% of naphtha, 1 to 6wt% of isopropanol, 10 to 15wt% of MTB, 5 to 9wt% of aromatics, and 1 to 7wt% of butanol.

[13] Preferably, the present invention provides a method of sequentially mixing a) 35 to

45 wt% of methanol or ethanol: b) 5 to 7wt% of isopropanol: c) 5 to 8 wt% of butanol: d) 15 to 25wt% of toluene: e) 5 to 10 wt% of non-aromatic raffinate: f) 5 to 10 wt% of pentane: g) 15 to 25wt% of naphtha: and h) 5 to 10 wt% of xylene.

[14] Preferably, the present invention provides a method of sequentially mixing a) 10 to 50 to 55wt% of naphtha: e) 1 to 6wt% of isopropanol: f) 10 to 15wt% of MTB: g) 5 to 9wt% of aromatics: and h) 1 to 7wt% of butanol.

[15] Preferably, the present invention provides a high density mixed alcohol fuel by sequentially mixing the above enumerated materials.

[16] Preferably, isopropanol operates as a surfactant, butanol allows an engine to be easily started at low temperatures, and toluene improves explosive power. Also, non-aromatic raffinate is added, instead of reformed gasoline, in a mixed fuel of Korea Patent No. 0242667, so as to inhibit vapor condensation caused by the reformed gasoline and to improve explosive power and ignitibility. In addition, the non-aromatic raffinate is usually generated as a by-product in the process of extracting aromatic chemicals (benzene, toluene, and xylene) from cracked gasoline (RPG), the cracked gasoline being obtained during a process of obtaining ethylene by naphtha cracking, and can be used as a solvent.

Advantageous Effects

[17] The fuel according to the present invention can replace conventional gasoline due to a reduced production cost, and can reduce the amount of exhaust gas due to complete combustion of ethanol, thereby achieving an environmental pollution prevention effect. Also, the fuel can be directly applied to a vehicle without changing an inlet device or an inlet port of the vehicle. Also, since the fuel has almost the same output power as gasoline, and a freezing point lower than gasoline, it is possible to maintain start ability of the vehicle, even in a cold environment. Mode for the Invention

[18] Example

[19] Example 1: Preparation of a mixed alcohol fuel

[20] Fuels having composition ratios according to Table 1 and Table 2 were prepared. In preparing fuels, respective materials were sequentially mixed at room temperature and at atmospheric pressure, and were subjected to agitation so that mixing could be entirely sufficiently carried out.

[21] Table 1

[Table 1]

[Table ]

Fuel composition ratio

[22] Table 2 [Table 2] [Table ] Fuel composition ratio

[23] [24] Example 2: Comparison between gasoline and a mixed fuel [25] According to the following ratio and order, methanol, I.P.A (isopropanol) functioning as a surfactant, butanol (alcohol), and toluene were mixed.

[26] Methanol (or ethanol) 35 wt% [27] isopropanol 15 wt% [28] butanol 5 wt% [29] toluene 25 wt%

[30] modified gasoline 20 wt%

[31] In an appropriate vessel (tube), the mixing was carried at the same temperature and at atmospheric pressure, and in order to entirely uniformly mix the materials, an appropriate mixer was introduced. Herein, the modified gasoline indicates non-aromatic raffinate, pentane, naphtha, and xylene.

[32] Table 3

[Table 3]

[Table ]

Comparison table of fuel state

[33] As noted in Table 3, in the mixed fuel prepared according to the present invention, a specific gravity was about 0.805 to 0.815 (which is similar to gasoline of 0.7 to 0.8), a flash point was -18⁰C to -2O⁰C (which is uniformly stable), and an ignition point was also on a level with gasoline. Also, vapor pressure was 0.705, which is within a range of 0.45 to 0.80 (a gasoline basis value) and was relatively stably maintained. [34] In addition, in a corrosion test on a copper plate, the mixed fuel according to the present invention proved to be better due to lower corrosiveness than conventional gasoline, and also, in a smoke soot test, the produced amount of soot of the mixed fuel was less than conventional gasoline. [35] Example 3: Test on vehicles

[36] Table 4

[Table 4]

[Table ] test results on vehicles

[37] As noted in Table 4, the mixed fuel according to the present invention has almost the same fuel efficiency as gasoline. Accordingly, in consideration of the lower production cost of the mixed fuel than gasoline, it is possible to achieve a cost reduction effect. Also, the complete combustion of alcohol materials and other various mixed materials widens the range of combustion, and thus increases the output power, thereby decreasing the amount of exhaust gas by 50% with respect to a gasoline-powered vehicle.

[38] In addition, the performance test using a clarifier for preparing gasoline was carried out in the same manner of the gasoline performance test, and thus it was determined that motor performance was desirably maintained at -2O⁰C. Also, compared to gasoline, it was determined that the mixed fuel had better combustion conditions, did not impose a burden on a motor by reducing the motor s own calorific value, did not generate carbons, prolonged the life of the motor and motor oil, and significantly decreased vibrations and noise. Industrial Applicability

[39] While this invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment and the drawings. On the contrary, it is intended to cover various modifications and variations within the spirit and scope of the appended claims.

Claims

[1] A high density mixed alcohol fuel comprised of methanol or ethanol as a main material, the fuel comprising methanol or ethanol, isopropanol, butanol, toluene, non-aromatic raffinate, pentane, naphtha, and xylene.

[2] A high density mixed alcohol fuel comprised of methanol or ethanol as a main material, the fuel comprising methanol or ethanol, C5, mixed oil, naphtha, isopropanol, MTB, aromatics, and, butanol.

[3] The high density mixed alcohol fuel as claimed in claim 1, which is comprised of

35 to 45 wt% of methanol or ethanol, 5 to 7wt% of isopropanol, 5 to 8 wt% of butanol, 15 to 25wt% of toluene, 5 to 10 wt% of non-aromatic raffinate, 5 to 10 wt% of pentane, 15 to 25wt% of naphtha, and 5 to 10 wt% of xylene.

[4] The high density mixed alcohol fuel as claimed in claim 2, which is comprised of

10 to 25 wt% of methanol or ethanol, 4 to 14 wt% of C5, 4 to 14 wt% of mixed oil, 50 to 55wt% of naphtha, 1 to 6wt% of isopropanol, 10 to 15wt% of MTB, 5 to 9wt% of aromatics, and 1 to 7wt% of butanol.

[5] A method of preparing a high density mixed alcohol fuel, the method comprising the step of; mixing sequentially a) methanol or ethanol: b) isopropanol: c) butanol: d) toluene: e) non-aromatic raffinate: f) pentane: g) naphtha: and h) xylene.

[6] The method as claimed in claim 5, wherein the high density mixed alcohol fuel is comprised of 35 to 45 wt% of methanol or ethanol, 5 to 7wt% of isopropanol, 5 to 8 wt% of butanol, 15 to 25wt% of toluene, 5 to 10 wt% of non-aromatic raffinate, 5 to 10 wt% of pentane, 15 to 25wt% of naphtha, and 5 to 10 wt% of xylene.

[7] A method of preparing a high density mixed alcohol fuel, the method comprising the step of; mixing sequentially a) methanol or ethanol: b) C5: c) mixed oil: d) naphtha: e) isopropanol: f) MTB: g) aromatics: and h) butanol.

[8] The method as claimed in claim 7, wherein the high density mixed alcohol fuel is comprised of 10 to 25 wt% of methanol or ethanol, 4 to 14 wt% of C5, 4 to 14 wt% of mixed oil, 50 to 55wt% of naphtha, 1 to 6wt% of isopropanol, 10 to 15wt% of MTB, 5 to 9wt% of aromatics, and 1 to 7wt% of butanol.