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Method for regenerating and maintaining activity of ionic liquid catalyst and method for producing alkylate

A technology of alkylation oil and catalytic activity, which is applied in the field of petrochemical industry, can solve the problems of unfavorable industrial production development, frequent replacement and regeneration, etc., and achieve the effect of easy operation, prolonging service life and maintaining catalytic activity

Active Publication Date: 2010-01-06
北京中实奥杰石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to process more than 100 grams of raw materials per gram of ionic liquid catalyst, resulting in frequent replacement and regeneration of ionic liquid catalysts. This situation is obviously not conducive to the development of industrial production.

Method used

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  • Method for regenerating and maintaining activity of ionic liquid catalyst and method for producing alkylate
  • Method for regenerating and maintaining activity of ionic liquid catalyst and method for producing alkylate
  • Method for regenerating and maintaining activity of ionic liquid catalyst and method for producing alkylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Change the cation from Et 3 Provided by NHCl, the anion is provided by AlCl 3 The acidic ionic liquid provided by CuCl is used as a catalyst to catalyze the isobutane alkylation reaction on a continuous device. The amount of ionic liquid added is 200g, the reaction pressure is 0.5MPa, the reaction temperature is 25°C, and the raw materials are isobutane and 2- A mixture of butenes, the molar ratio of alkene to 20:1, the alkylation product obtained by catalytic alkylation reaction with a fresh catalyst was collected, and its composition was analyzed. The results are shown in Table 1.

[0041] As can be seen from Table 1, when the amount of raw material treated by per gram of ionic liquid catalyst reaches 50 grams, the catalyst activity obviously declines; The catalyst was completely deactivated, and a total of 1120 g of alkylated oil products were obtained.

[0042] Table 1 Continuous evaluation of fresh ionic liquid catalytic alkylation

[0043]

[0044] Such as ...

Embodiment 2

[0052] The cation is provided by [bmim]Cl (butylmethylimidazolium chloride), and the anion is provided by AlBr 3 and CuSO 4 The acidic ionic liquid provided is used as a catalyst to catalyze the alkylation reaction of isobutane on a continuous device. The amount of ionic liquid added is 200g, the reaction pressure is 0.5MPa, the reaction temperature is 20°C, and the raw materials are isobutane and 2-butene , isobutene and 1-butene, the molar ratio of alkene is 40:1, collect the alkylation product catalyzed by fresh catalyst, analyze its composition, the results are shown in Table 4.

[0053] It can be seen that when the amount of raw material treated by each gram of ionic liquid catalyst reaches 100 grams, the catalyst activity significantly decreases, and when the amount of raw material treated by each gram of ionic liquid catalyst reaches 110 grams, the catalyst is completely deactivated, and at this time a total of alkylated oil products are obtained 1021g.

[0054] Table...

Embodiment 3

[0066] For the reaction process, see figure 1 , the cation is provided by [bmim]Cl and the anion by AlCl 3 The acidic ionic liquid provided is used as a catalyst to catalyze the alkylation reaction of isobutane on a continuous device. The amount of ionic liquid added is 30kg, the reaction pressure is 0.5MPa, the reaction temperature is 30°C, and the reaction raw materials are isobutane, 2-butane The mixture of alkenes, isobutenes and 1-butenes, the molar ratio of alkanes to alkenes is 10:1, the feeding rate of raw materials is 12kg / h, the yield of alkylated oil is 2.4kg / h, and the reaction is carried out continuously at 2g / h Pass hydrogen chloride into the vessel (or pass into the reactor together after being mixed with the reaction raw materials), collect the alkylation product, analyze its composition, and the results are shown in Table 7.

[0067] It can be seen from Table 7 that when the amount of raw material treated per kilogram of ionic liquid catalyst reaches 1000 kil...

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Abstract

The invention discloses a method for regenerating and maintaining the activity of an ionic liquid catalyst, and the method comprises the following step of adding hydrogen halide or halohydrocarbon in an acidic ionic liquid catalyst or alkylation reaction raw material during the alkylation reaction process, and the ionic liquid catalyst is used for catalyzing alkylation of C4 alkene and alkane. And the invention also provides a method for producing alkylate by using alkylation reaction, and the method comprises the following step of adding the hydrogen halide or the halohydrocarbon in the acidic ionic liquid catalyst or the alkylation reaction raw material during the alkylation reaction process, and the regeneration of the ionic liquid catalyst and the continuous production of the alkylateare realized by adding B acid lost during the alkylation reaction process of the ionic liquid catalyst. The invention can effectively prolong the service life of the acidic ionic liquid catalyst, andthe treatment capacity of the raw materials can reach more than 1000 times of consumption of the ionic liquid; and the method has no influence to the quality of the alkylate, is simple and convenientin operation, and has higher industrial practicability.

Description

technical field [0001] The invention relates to a catalyst regeneration method, and more specifically provides a method for realizing the regeneration and maintaining the activity of the ionic liquid catalyst, and further realizing the continuous production of alkylated oil, which belongs to the field of petrochemical industry. Background technique [0002] In the petroleum refining industry, the alkylation of C4 alkanes and olefins (also known as C4 alkylation, usually using more isobutane, also known as isobutane alkylation) is a blending group for the production of clean high-octane gasoline. One of the important technological processes of points. The alkylated oil obtained from the alkylation process is a fuel product, which refers to a liquid product made from C4 olefins and alkanes catalyzed by an acidic catalyst. It can be said to be a specific alkylation product, in which the C8 group The selectivity of the fraction and the ratio of TMP / DMH (trimethylpentane / dimethy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/60C10G50/00B01J31/02B01J38/54B01J38/48
CPCB01J31/0278B01J31/0284C10G2300/70B01J31/26B01J31/40C07C2/60C07C2527/126C10G2300/1092B01J38/54C10G2300/1081C07C2527/122B01J38/60C10G29/205C07C2527/055C07C2527/125B01J31/38B01J31/30Y02P20/584
Inventor 刘植昌张睿孟祥海徐春明
Owner 北京中实奥杰石油科技有限公司
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