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Method for producing alkylation gasoline by taking ionic liquid as accelerator of fluorosulphonic acid

A technology for alkylating gasoline and ionic liquids, applied in chemical instruments and methods, production of liquid hydrocarbon mixtures, petroleum industry, etc., can solve problems such as poor effects, and achieve the effects of simple process, low catalyst cost, and mild reaction conditions

Inactive Publication Date: 2010-10-06
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic effect of this type of ionic liquid is poor

Method used

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  • Method for producing alkylation gasoline by taking ionic liquid as accelerator of fluorosulphonic acid
  • Method for producing alkylation gasoline by taking ionic liquid as accelerator of fluorosulphonic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 0.5 mol (68 g) of butyl sultone to an equimolar solution of N-butylimidazole in toluene, and stir at 40° C. for 24 hours to make the reaction complete. After cooling and washing, a white powder zwitterion was obtained. Then equimolar trifluoromethanesulfonic acid was slowly added to the aqueous solution of zwitterions, and stirred at 40°C for 48 hours. Then after washing, rotary evaporation to remove water and dry to obtain 3-butyl-1-(4-butylsulfonic acid)-imidazole trifluoromethanesulfonic acid ionic liquid.

Embodiment 2

[0017] Add 0.5 mole of N-methylimidazole into slightly excess 1-bromobutane, reflux and stir for 2 hours, then react at room temperature for 72 hours. The upper solution was poured out, and the lower solution was recrystallized three times with acetonitrile / ethyl acetate solution. Rotary evaporation to remove water and dry to obtain 3-butyl-1-methylimidazolium bromide. Add 0.5 mol of 3-butyl-1-methylimidazolium bromide to a slightly excess aqueous solution of potassium hexafluorophosphate. Stir at room temperature for 24 hours. Separate layers, take the product layer, wash with water, and dry to obtain 3-butyl-1-methylimidazolium hexafluorophosphate ionic liquid.

Embodiment 3

[0019] Add 0.5 mol (68 g) of butyl sultone into an equimolar solution of pyridine in toluene, and stir at 40° C. for 24 hours to make the reaction complete. After cooling and washing, a white powder zwitterion was obtained. Then equimolar tetrafluoroboric acid was slowly added into the aqueous solution of zwitterions, and stirred at 40° C. for 48 hours. Then, after washing, rotary evaporation removes water and dries to obtain butylsulfonic acid pyridinium tetrafluoroborate ionic liquid.

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Abstract

The invention relates to a method for producing high-octane gasoline by accelerating catalytic conversion of fluorosulphonic acid into isobutene butylene with a novel ionic liquid in the field of chemical industry. The ionic liquid has an A+B- molecular structure, wherein the cation A+ has an imidazole, pyridine, quaternary ammonium salt, quaternary phosphorus salt cation structure or the like; the anion B- has a BF4-, PF6-, CF3SO3- structure or the like; and the ionic liquid can be a single ionic liquid or a mixed ionic liquid. By accelerating the catalytic conversion of the fluorosulphonic acid into the isobutene butylene with the ionic liquid, the alkylation gasoline can be produced at high selectivity under certain reaction conditions; and when the reaction is finished, the acidic ionic liquid catalyst can be conveniently separated from the alkylate by a simple process. Compared with the conventional sulfuric acid process and the conventional hydrogen fluoride process, the process has the advantages of mild reaction conditions, high selectivity of C8, low catalyst cost and high safety for use and is an environment-friendly new process.

Description

Technical field: [0001] The invention belongs to the field of high-octane gasoline production. It specifically relates to an ionic liquid accelerator, which is a new method for improving acid catalytic conversion of isobutane butene to produce high-octane gasoline. Background technique: [0002] The alkylation process of isobutane and butene is an important process in the petrochemical refining industry. According to statistics, more than 10% of the world's gasoline production is alkylated gasoline. The total annual output reaches more than 100 million tons. Alkylated gasoline has the characteristics of high octane number (RON: 96-98, MON: 96-94), low Reid vapor pressure, low sulfur and low aromatics. When this gasoline is burned, it will greatly alleviate the urban air pollution caused by automobile exhaust emissions. Therefore, it is an ideal gasoline blending component. With the rapid development of the automobile industry and people's attention to the environment, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/00B01J31/02
Inventor 张锁江张镇赵国英辛加余张香平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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