CN1210379C - Method of producing high octane value gasoline blending component using mixed C4 - Google Patents
Method of producing high octane value gasoline blending component using mixed C4 Download PDFInfo
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- CN1210379C CN1210379C CN 01127508 CN01127508A CN1210379C CN 1210379 C CN1210379 C CN 1210379C CN 01127508 CN01127508 CN 01127508 CN 01127508 A CN01127508 A CN 01127508A CN 1210379 C CN1210379 C CN 1210379C
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Abstract
The present invention relates to a method for producing high-octane petrol blending components by using mixed C4, which is characterized in that mixed C4 is used as a raw material, the polyreaction of the raw material is generated under the existence of catalysts and inhibitor, and polymerization products obtained from the polyreaction are made into alkylation products by hydrogenation. The polyreaction can be realized by the combination of a fixed-bed polymerization reactor and a catalyzing distilling tower, and can also be realized by at least two level series fixed-bed reaction. When the method is used, appreciation of alkene and gasoline in mixed C4 in the process of petroleum processing is realized, the C4 resources is effectively utilized, the conversion rate of isobutylene in C4 reaches over 90%, the total content of C8 in hydrogenated products reaches at least 92%, and octane value is not lower than 95.
Description
Technical field
The present invention relates to the production method of stop bracket gasoline blend component.
Background technology
In order to satisfy the requirement of New standard gasoline, the blending component of blending method production New standard gasoline mainly contains: MTBE, TAME, ethanol, alkylation products and indirect alkylation products, wherein MTBE is main blending component, but MTBE is very easily water-soluble, is a kind of potential pollutent to underground water.And the MTBE vapour pressure is higher, contradicts with the low volatility development trend of gasoline; There are same problem in TAME and MTBE; The production of ethanol petrol need consume a large amount of grain, so its industrial scale and grown place all are restricted; Alkylation process is to the equipment requirements harshness, and the acid consumption is high, and the spent acid amount is big, difficult treatment, and deficiency in economic performance is so working rate is very low; Indirectly the alkylation main products consists of octane-iso and other C8, C12 isoparaffin, compare with alkylation, not only flow process is simple, and octane value and vapour pressure index obviously be better than alkylation products, the more important thing is the problems such as burn into acid treatment that overcome alkylation process.
The mixed C that produces in the relevant petroleum refining process
4Patent and article that middle isobutene polymerisation utilizes are a lot, most upper intake lower outlet type fixed-bed process that adopt.US4100220 allocates an amount of trimethyl carbinol into and improves the polyreaction selectivity in raw material, and establishes the reactor outer circulation to take reaction heat away, contains alkene owing in the recycle stock, so superpolymer content is higher in the product.CN1087616A discloses several grades of fixed bed series connection polymerization techniques of mixed c 4, raw material passes through two-stage or the above tandem reactor of two-stage successively, undertaken by the controlling reaction temperature polyreaction, owing to do not add polymerization inhibitor, make that equally trimer content is higher in the reactor product.US4215011 adopts catalytic distillation technology to mix C
4The selective polymerisation of middle iso-butylene, catalytic distillation technology can solve the problem that is not easy to solve in a lot of fixed beds.The temperature of each point depends on the boiling point of material under the setting pressure in the distillation tower, the too high problem of reaction bed temperature rise can not occur.The souring of phegma is stronger, has avoided the polymkeric substance adhesion, has accumulated in catalyst surface.Centrifugation makes dimerisation products leave catalyst surface very soon, reduces further polymeric chance, thereby improves the selectivity of dimerization reaction.This patent does not make water or alcohols improve the polyreaction selectivity, thinks that on the contrary the less water that contains in the raw material can be unfavorable to the selective dimerisation of iso-butylene, and the industrializing implementation example of this point and other document introductions fails to agree.Above patented technology all has only mixed C
4In the polymerization technique of alkene, do not expand the subsequent technique of the indirect alkylate oil of polymerization product hydrogenation production.
China C
4Aboundresources, but its utilising efficiency is lower always, and major part has all been made industry or domestic fuel, by above description, utilizes mixed C
4Being raw material, producing high octane value gasoline blending component by indirect alkylated reaction, is a kind of while can make C
4Alkene and gasoline appreciate, and effectively utilize C
4The important method of resource.
Summary of the invention
Technical problem to be solved by this invention provides utilizes mixed C
4Produce the method for high octane value gasoline blending component, with mixed C
4In alkene high conversion, highly selective dimerization, then the polymerisate hydrogenation is produced alkylate oil.
The mixed C of utilizing of the present invention
4Produce the method for high octane value gasoline blending component, it is characterized in that utilizing mixed C
4Be raw material, raw material catalyzer and have inhibitor in the presence of polymerization reaction take place, the polymerization product that obtains through separation after the polyreaction carries out hydrogenation reaction and obtains alkylation products.
The present invention utilizes the mixed C in the petroleum refining process
4Be raw material, produce high octane value gasoline blending component, opened up mixed C
4Purposes.
Described inhibitor is a water-soluble inhibitor, can be water, the trimethyl carbinol or its mixture, and polyreaction obtains polymerization product after wash, reclaim inhibitor.The mol ratio of the iso-butylene in inhibitor and the raw material is: 0.001～1, be preferably: 0.005～0.2.Inhibitor is in order effectively to suppress the carrying out of high poly-reaction more than the trimerization, to improve the selectivity of polyreaction, to improve the transformation efficiency of dimerization product.
The temperature of polyreaction is 10～180 ℃, is preferably 30～120 ℃, and reaction pressure is 0.2～4.0Mpa, is preferably 0.3～2.0Mpa.
Polyreaction of the present invention is preferably passed through two-stage or more than the two-stage, to improve C
4Middle conversion of olefines rate and selectivity.This polyreaction can adopt following dual mode:
The one, through fixed bed prepolymerization reaction and catalytic distillation reaction.Prepolymerization reaction can improve the selectivity of polyreaction, carries out in fixed-bed reactor, reduces the generation of the above superpolymer of trimerization.Fixed bed polyreaction and catalytic distillation reaction can be operated under uniform temp, also can operate under differing temps, and general catalytic distillation temperature of reaction is higher than the fixed bed polyreaction, but polymeric reaction temperature should be in above-mentioned polymeric reaction temperature scope.The working pressure of fixed bed polyreaction is than the high 0～1.0Mpa of working pressure of catalytic distillation reaction, but reaction pressure also should be in above-mentioned polymerization pressure scope.
Technology characteristics is: mixed C
4In alkene such as iso-butylene, n-butene polymerization reaction take place in the fixed-bed reactor of catalyzer are housed and in the catalytic distillation tower.Having polymerization inhibitor to exist in the polymerization process, mainly is the multipolymer etc. of diisobutylene and iso-butylene and n-butene during polymerization product is formed.Remain C after the polymerization
4Overflow in the catalytic distillation column overhead, part loops back the fixed bed polymerization reactor with isobutylene concentration in the dilution charging and take reaction heat away, and in parts by weight, this internal circulating load is C
40.5～10 times of charging.Work as mixed C
4The concentration of middle iso-butylene is no more than at 20% o'clock, can not establish residue C
4Recycle feed.Loop back the residue C of fixed bed polymerization reactor
4Relevant with the concentration of iso-butylene in the ratio of fresh feed and the raw material, the concentration of iso-butylene is high more, and the circulation ratio that needs is big more.Adopt the residue C after separating
4Reaction heat is taken in circulation away, has overcome US4100220 patent polymerization product round-robin disadvantage (superpolymer content height).Tower still polymerization product send water wash column flush away water-soluble polymeric inhibitor, and the washing Tata still aqueous solution send recovery tower to reclaim polymerization retarder.Polymerization product after the washing advances fixed bed hydrogenation reactor, and hydrogenation catalyst is palladium, nickel, rhodium or cobalt-molybdenum metal catalyst, and the hydrogenated products alkylate oil is high-octane gasoline blending component.
This technological process adopts the combination of a fixed bed polymerization reactor and catalytic distillation tower.
The adding mode of inhibitor can be disposablely to add when prepolymerization reaction, also can be to add at prepolymerization reaction and two stages of catalyzed reaction, and the add-on in prepolymerization reaction stage is more than 60% of total add-on.
The 2nd, polyreaction is through two-stage or the above fixed bed cascade reaction of two-stage.
Technology characteristics is: mixed C
4In alkene such as iso-butylene, n-butene in that the polymerization reaction take place in the series connection fixed-bed reactor more than two or two of catalyzer is housed, have polymerization inhibitors such as the water or the trimethyl carbinol to exist in the polymerization process, mainly consist of residue C
4, diisobutylene, iso-butylene and the multipolymer of n-butene, a small amount of above superpolymer of trimerization polymerization product send and take off C
4Tower (available catalytic distillation tower is not adorned catalyzer and separated as knockout tower).Take off C
4The same polymeric reaction condition of the service temperature of tower and pressure.Residue C
4Taking off C
4Column overhead is overflowed, and part loops back one-level fixed bed polymerization reactor with isobutylene concentration in the dilution charging and take reaction heat away, when the concentration of iso-butylene is no more than 20%, can not establish residue C
4Recycle feed.Loop back the residue C of fixed bed polymerization reactor
4Relevant with the concentration of iso-butylene in the ratio of fresh feed and the raw material, the concentration of iso-butylene is high more, and the circulation ratio that needs is big more.Tower still polymerisate send water wash column flush away water-soluble polymeric inhibitor, and the washing Tata still aqueous solution send recovery tower to reclaim inhibitor.Polymerization product after the washing advances fixed bed hydrogenation reactor, and the hydrogenated products alkylate oil is high-octane gasoline blending component.
This technological process adopts two or two above fixed bed polymerization reactors and takes off C
4The combination of knockout tower.
The adding mode of inhibitor can be disposable adding when the first step is reacted, and also can be all to add in two-stage reaction, and the add-on of first step reaction is more than 60% of total add-on.
Polymerisation catalysts is a solid acid catalyst, can be the agent of macropore sulfonic acid cation resin catalyzing, solid phosphoric acid catalyst or heteropolyacid catalyst.The use air speed is 0.5～10h
-1
The temperature of described hydrogenation reaction is 30～360 ℃, is preferably 100～260 ℃, and reaction pressure is 0.1～4.0Mpa, is preferably 0.5～3.0Mpa.The catalyzer of hydrogenation reaction can be common palladium, rhodium or cobalt-molybdenum hydrogenation catalyst, and its weight hourly space velocity is 0.1～10kg/ (g. active ingredient .h).
Mixed C of the present invention
4Contain 5～60% iso-butylene, wherein the content of divinyl≤0.01%.
The polymerization product that obtains after the polyreaction is mainly C
8, C
12, C wherein
8Total content 〉=92%, C
12Content≤8% contains C hardly
16Isoparaffin content in the hydrogenated products 〉=98%, its octane value 〉=95.
Advantage of the present invention:
With the mixed C that produces in the petroleum refining process
4Be raw material, with alkene high conversion, highly selective dimerization wherein, then the polymerisate hydrogenation produced alkylate oil, this alkylate oil is as the blending component of producing stop bracket gasoline.The present invention makes C simultaneously
4In alkene and gasoline appreciate, effectively utilized C
4Resource.Technology of the present invention makes C
4Middle conversion for isobutene reaches more than 90% C in the hydrogenated products
8Total content 〉=92%, octane value 〉=95.The present invention is applicable to the olefinic polymerization back end hydrogenation in the petroleum hydrocarbon mixture, also is applicable to petroleum hydrocarbon hydrogenation desulfurization, takes off diolefin and alkynes, alcohol and sour esterification, the hydrolysis reaction of ester, olefin hydration reaction and C
4～C
8Tertiary olefin and C
1～C
4Reactions such as the synthetic corresponding ether product of aliphatic hydrocarbon, be specially adapted to mixed C
4Gasoline blending component is produced in alkylation indirectly, can satisfy the requirement of clean fuel gasoline.
Description of drawings
Fig. 1 is the indirect alkylation process schema of catalytic distillation process of the present invention;
Fig. 2 is the present invention's indirect alkylation process schema of fixed bed process of connecting.
Embodiment
Below in conjunction with process flow sheet the present invention is described:
One, the indirect alkylation process of catalytic distillation process
As Fig. 1, mixed C
4Send into fixed-bed reactor 1 through pipeline 6 and pipeline 7 respectively with polymerization inhibitor, prepolymerization is after pipeline 8 is sent into catalytic distillation tower 2, mixed C
4Here further polymerization remains C after the polymerization
4Go out cat head through pipeline 9, polymerization product goes out the tower still and sends into water wash column 3 through pipeline 14.Cat head residue C
4Be divided into three parts after condenser 10 condensations, a part refluxes through pipeline 11, and a part is as inertia C
4Loop back the fixed bed polymerization reactor through pipeline 12, with dilution feed olefin concentration, reduce reaction temperature rising, rest part goes out device by pipeline 13.Former water advances water wash column 3 through pipeline 15, and water wash column 3 tower stills send inhibitor recovery tower 4 through the water that pipeline 16 will contain polymerization inhibitor, and the inhibitor reusable edible that this column overhead steams also can be used as byproduct for treatment, is sent by pipeline 18.Tower bottoms is the water of fxa inhibitor, incorporates pipeline 15 into through pipeline 17 and loops back washing tower 3.Water wash column cat head polymerization product mixes with hydrogen from pipeline 20 through pipeline 19, sends into hydrogenator 5 top opening for feeds by pipeline 21 then.Hydrogenator is the upper intake lower outlet type fixed-bed reactor, and product goes out separated into two parts behind the reactor by pipeline 22, and a part is incorporated pipeline 21 into through pipeline 23 and pipeline 25 circulations, and 25 interchanger 24 of pipeline 23 and pipeline are used for reducing temperature of charge.Another part is as the alkylation process the finished product---indirect alkylate oil goes out device through pipeline 26 indirectly.
The conversion zone of catalytic distillation tower can use the catalysis-distillation equipment as Chinese patent CN1022382.
Two, the indirect alkylation process of series connection fixed bed process
As Fig. 2, mixed C
4Send into one-level fixed-bed reactor 1a through pipeline 6 and pipeline 7 respectively with polymerization inhibitor, preliminary polymerization is allocated an amount of polymerization inhibitor into pipeline 8 by pipeline 9 simultaneously after pipeline 8 is sent into secondary fixed-bed reactor 1b.Mixed C
4In the further polymerization of 1b, mixture is sent into through pipeline 10 and is taken off C after the polymerization
4Tower 2, residue C
4Go out cat head through pipeline 11, and be divided into three parts after condenser 12 condensations, a part is back to knockout tower 2 through pipeline 13 and (takes off C
4Tower), a part is as inertia C
4Loop back the one-level fixed-bed reactor former stockline 6 that enters the mouth through pipeline 14, with dilution feed olefin concentration, reduce reaction temperature rising, rest part goes out device.Tower still polymerisate is sent into water wash column 3 through pipeline 16.Former water advances water wash column 3 through pipeline 15, and water wash column 3 tower stills send inhibitor recovery tower 4 through the water that pipeline 17 will contain polymerization inhibitor, and the inhibitor reusable edible that this column overhead steams also can be used as byproduct for treatment, is sent by pipeline 19.Tower bottoms is the water of dehydration inhibitor, incorporates pipeline 15 into through pipeline 18 and loops back washing tower 3.Water wash column cat head polymerization product mixes with hydrogen from pipeline 21 through pipeline 20, sends into hydrogenator 5 top opening for feeds by pipeline 22 then.Hydrogenator is the upper intake lower outlet type fixed-bed reactor, and product goes out separated into two parts behind the reactor by pipeline 23, and a part is incorporated pipeline 22 into through pipeline 24 and pipeline 26 circulations, and 26 interchanger 25 of pipeline 24 and pipeline are used for reducing temperature of charge.Another part is as the alkylation process the finished product---indirect alkylate oil goes out device through pipeline 27 indirectly.
Embodiment one:
Adopt as the indirect alkylation process of the catalytic distillation process of Fig. 1.
Mixed C
4In contain iso-butylene 48.5%, contain n-butene 26.3%
Inlet amount: 300g/h
Fixed bed polymerization reactor catalyzer loading amount: 500ml
Catalytic distillation tower catalyzer loading amount: 200ml
Hydrogenator dress 300gl palladium catalyst
Allocate polymerization inhibitor (trimethyl carbinol) in the raw material into, the mol ratio of iso-butylene is 0.015: 1 in inhibitor and the fresh feed.
Polymerization product all send hydrogenation unit
50.0 ℃ of fixed bed polymeric reaction temperatures, reaction pressure 0.65Mpa
62 ℃ of catalytic distillation tower bed temperature ins, reaction pressure 0.65Mpa
The hydrogenation bed temperature: 160 ℃, hydrogenation pressure 1.0Mpa
Get polymerization product 185g/h, wherein C8 content is 93.7%
Hydrogenated products isoparaffin 99.8%, anti-knock index 97.1.
Embodiment two:
Adopt the indirect alkylation process of fixed bed process of connecting as Fig. 2
Mixed C
4In contain iso-butylene 48.5%, contain n-butene 26.3%
Inlet amount: 300g/h
First and second grade fixed bed polymerization reactor catalyzer loading amount is respectively: 500ml, 300ml
Allocate an amount of polymerization inhibitor (water) in the two-stage reactor charging respectively into, the mol ratio that always suppresses the iso-butylene in dosage and the fresh feed is 0.02: 1, and the add-on of first step reaction is 70% of a total amount.
Hydrogenator dress 300g palladium catalyst
50.0 ℃ of first step fixed bed polymeric reaction temperatures, reaction pressure 1.0Mpa
70.0 ℃ of second stage fixed bed polymeric reaction temperatures, reaction pressure 1.0Mpa
The hydrogenation bed temperature: 160 ℃, hydrogenation pressure 1.0Mpa
Get polymerization product 178g/h, wherein C8 content is 92.3%
Hydrogenated products isoparaffin 99.5%, anti-knock index 96.9.
Claims (5)
1, utilizes mixed C
4Produce the method for high octane value gasoline blending component, it is characterized in that utilizing mixed C
4Be raw material, raw material catalyzer and have inhibitor in the presence of polymerization reaction take place, polyreaction is after washing, reclaim polymerization product that inhibitor obtains and carry out hydrogenation reaction and obtain alkylation products,
Wherein:
Described polymerisation catalysts is a solid acid catalyst, adopts the agent of macropore sulfonic acid cation resin catalyzing, solid phosphoric acid catalyst or heteropolyacid catalyst, and the use air speed is 0.5～10h
-1,
Described inhibitor is a water-soluble inhibitor, and the mol ratio of the iso-butylene in inhibitor and the raw material is: 0.001～1, and inhibitor can be water, the trimethyl carbinol or its mixture,
Described polymeric reaction temperature is 10～180 ℃, and reaction pressure is 0.2～4.0Mpa, and fixed bed prepolymerization reaction and the catalytic distillation reaction of polyreaction through successively carrying out enters knockout tower and separate after the polyreaction,
Isolated residue C after the polyreaction
4Part is circulated in the raw material charging of beginning polyreaction, and in parts by weight, internal circulating load is C
40.5～10 times of charging,
The temperature of described hydrogenation reaction is 30～360 ℃, and reaction pressure is 0.1～4.0Mpa.
2, method according to claim 1 is characterized in that the mol ratio of the iso-butylene in inhibitor and the raw material is: 0.005～0.2.
3, method according to claim 1, the temperature that it is characterized in that polyreaction is 30～120 ℃, reaction pressure is 0.3～2.0Mpa.
4, method according to claim 1 is characterized in that described mixed C
4Contain 5～60% iso-butylene, wherein the content of divinyl≤0.01%.
5, method according to claim 1 is characterized in that the polymerization product that obtains after the polyreaction is mainly C
8, C
12, C wherein
8Total content 〉=92%, C
12Content≤8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127508 CN1210379C (en) | 2001-09-26 | 2001-09-26 | Method of producing high octane value gasoline blending component using mixed C4 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01127508 CN1210379C (en) | 2001-09-26 | 2001-09-26 | Method of producing high octane value gasoline blending component using mixed C4 |
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| Publication Number | Publication Date |
|---|---|
| CN1410516A CN1410516A (en) | 2003-04-16 |
| CN1210379C true CN1210379C (en) | 2005-07-13 |
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|---|---|---|---|
| CN 01127508 Expired - Fee Related CN1210379C (en) | 2001-09-26 | 2001-09-26 | Method of producing high octane value gasoline blending component using mixed C4 |
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|---|---|---|---|---|
| US9484645B2 (en) | 2012-01-05 | 2016-11-01 | Corning Optical Communications Rf Llc | Quick mount connector for a coaxial cable |
| US9548572B2 (en) | 2014-11-03 | 2017-01-17 | Corning Optical Communications LLC | Coaxial cable connector having a coupler and a post with a contacting portion and a shoulder |
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| CN107827694B (en) * | 2017-11-30 | 2023-12-26 | 凯瑞环保科技股份有限公司 | Device and method for producing isooctane by adopting indirect alkylation technology |
| CN108976102A (en) * | 2018-08-22 | 2018-12-11 | 丹东明珠特种树脂有限公司 | Isobutene overlaps inhibitor recovery method and its system and device |
| CN111217661B (en) * | 2018-11-27 | 2022-11-18 | 中国石油化工股份有限公司 | Method for preparing isooctane by isobutene superposition-hydrogenation |
| CN111217662B (en) * | 2018-11-27 | 2022-11-18 | 中国石油化工股份有限公司 | Method for preparing isooctane by isobutene superposition-hydrogenation |
| CN109369319B (en) * | 2018-12-07 | 2021-11-12 | 宁波旭合瑞石化工程有限公司 | Method for maximizing production of propylene by taking C4-C8 olefin as raw material |
| CN111378483B (en) * | 2018-12-29 | 2022-11-18 | 中国石油化工股份有限公司 | Combined method for selective superposition and isomerization of raffinate carbon four |
| CN111377789B (en) * | 2018-12-29 | 2023-01-13 | 中国石油化工股份有限公司 | Method for reducing 1-butene loss in raffinate carbon four-selective polymerization process |
-
2001
- 2001-09-26 CN CN 01127508 patent/CN1210379C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9484645B2 (en) | 2012-01-05 | 2016-11-01 | Corning Optical Communications Rf Llc | Quick mount connector for a coaxial cable |
| US9548572B2 (en) | 2014-11-03 | 2017-01-17 | Corning Optical Communications LLC | Coaxial cable connector having a coupler and a post with a contacting portion and a shoulder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1410516A (en) | 2003-04-16 |
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