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A method for preparing alkylated gasoline by catalyzing the reaction of isobutane and C4 olefins

A technology for alkylating gasoline and catalyzing isobutane, which is applied in chemical instruments and methods, organic chemistry, chemical recycling, etc., can solve the problems of equipment corrosive environment, difficult to recycle, pollute catalysts, etc., and achieve simple processing and stable products. , the effect of stabilizing the catalytic capacity

Inactive Publication Date: 2016-01-13
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

we have reason to believe A new method for the preparation of alkylated gasoline by the catalysis of bis-acid ionic liquids can realize the integration of reaction-separation in the alkylation process and the separation, recovery and recycling of catalysts, and solve the problem of existing traditional catalysts in the production of alkylated gasoline. Problems such as large acid consumption, serious equipment corrosion and environmental pollution, and difficult recycling of catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: 5g (3-sulfonic acid)-propyltriethylammonium chloride zincate ionic liquid (wherein the mol ratio of (3-sulfonic acid) propyltriethylammonium salt and zinc chloride 1 : 4) drop into the high-pressure airtight reaction kettle, nitrogen replaces the air in the kettle, pump 15g of the mixed solution of isobutane and isobutene (the ratio of the substance is 10:1) into the kettle, heat to 60°C and stir for 2h, statically Place and cool to room temperature, and collect residual gas from the kettle. Open the kettle, transfer the mixture in the kettle to a separatory funnel for phase separation. The lower phase is an ionic liquid catalyst, which can be directly used for the next reaction, and the upper phase is alkylated gasoline. The conversion rate of isobutene is 98.2%, the selectivity of TMP is 89.5%, and the yield of alkylated gasoline is 87.6%.

Embodiment 2

[0025] Embodiment 2: 3g (3-sulfonic acid)-propyltriethylammonium chlorocuprate ionic liquid (wherein the mol ratio of (3-sulfonic acid)-propyltriethylammonium chloride to cupric chloride 1:3.5), replace the air in the kettle with nitrogen, pump 15g of the mixed solution of isobutane and isobutene (the ratio of substances is 20:1) into the kettle, heat to 70°C and stir for 2.5h, stand still and cool to room temperature , to collect the residual gas from the kettle. Open the kettle, transfer the mixture in the kettle to a separatory funnel for phase separation. The lower phase is an ionic liquid catalyst, which can be directly used for the next reaction. The upper layer is alkylated gasoline. The conversion rate of isobutene is 99.5%, the selectivity of TMP is 90.5%, and the yield of alkylated gasoline is 93%.

Embodiment 3

[0026] Embodiment 3: 5g (2-sulfonic acid)-ethyltriethylammonium ferric chloride ionic liquid (wherein the mol ratio of chloride (2-sulfonic acid)-ethyltriethylammonium salt to ferric chloride 1:5) into a high-pressure airtight reaction kettle, replace the air in the kettle with nitrogen, pump 20 g of a mixture of isobutane and 1-butene (the ratio of substances is 15:1) into the kettle, heat to 15°C and stir React for 3h, let it stand and cool to room temperature, and collect the residual gas in the kettle. Open the kettle, transfer the mixture in the kettle to a separatory funnel for phase separation. The lower phase is an ionic liquid catalyst, which can be directly used for the next reaction. The upper layer is alkylated gasoline. The conversion rate of isobutene is 90.5%, the selectivity of TMP is 93.1%, and the yield of alkylated gasoline is 91.2%.

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Abstract

The invention discloses a method for preparing gasoline alkylate by catalyzing reaction of isobutane and C4 olefin. The method is characterized in that bronsted-lewis double acid ionic liquid formed by bronsted acid quaternary ammonium salt cations functionalized by an alkyl sulfonic acid and lewis acid inorganic anions is adopted as a catalyst; gasoline alkylate is prepared under the conditions that the molar ratio of isobutane to C4 olefin is (10:1) to (30:1), the mass ratio of a mixed solution of isobutane and C4 olefin to the ionic liquid is (3:1) to (10:1), the reaction temperature is 15-100 DEG C and the reaction time is 0.5-6 hours; the ionic liquid is recovered and repeatedly utilized. Compared with the prior art, the method has the advantages that 1, the catalyst has more stable catalytic ability; 2, the product is simple in post-treatment, and the obtained gasoline alkylate product is stable and good in quality, and is not dissolved into an ionic liquid catalyst to automatically layer, so that separation and post-treatment of the product are easier; 3, the catalyst ionic liquid is stable in performance, can be applied to the next reaction without any treatment after reaction, the catalytic performance is not reduced, the recycling performance is good, and the method belongs to an environment-friendly process route.

Description

technical field [0001] The present invention relates to a kind of catalytic isobutane and C 4 A method for preparing alkylated gasoline by reacting olefins, involving a Biacidic ionic liquid catalyzed isobutane and C 4 A new method for the production of alkylated gasoline by the alkylation reaction of olefins. Background technique [0002] The alkylation reaction of isobutane and butene is one of the important processes in the petroleum refining industry, and the products obtained are mainly isomeric C 8 Alkanes (trimethylpentane TMP and dimethylhexane DMH), known as alkylated gasoline, are the most ideal clean gasoline. Compared with gasoline prepared by catalytic cracking technology at present, it does not contain aromatics and olefins, almost contains no sulfur, and has the advantages of higher octane number and lower vapor pressure RVP. The difference between the two octane numbers of alkylated gasoline (research method and motor method) is not more than 3 units, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/62
CPCY02P20/584
Inventor 刘仕伟李露于世涛解从霞刘福胜陈传刚
Owner QINGDAO UNIV OF SCI & TECH