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Catalyst used for alkylation reaction, preparation method and application method thereof

A technology for an alkylation reaction and a catalyst is applied in the field of a catalyst for an alkylation reaction and its preparation, and can solve the problems of limited industrial application, inability to meet the needs of actual production, low total product selectivity and low toluene conversion rate, and the like. Excellent catalytic performance, good industrial application value, and the effect of inhibiting transalkylation

Active Publication Date: 2014-11-19
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above literatures basically use ZSM-5 molecular sieves to modify and prepare catalysts. Although the para-selectivity of p-methylethylbenzene has been improved, the total product selectivity and toluene conversion rate are still low. , can not meet the needs of actual production, thus limiting its industrial application

Method used

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  • Catalyst used for alkylation reaction, preparation method and application method thereof
  • Catalyst used for alkylation reaction, preparation method and application method thereof
  • Catalyst used for alkylation reaction, preparation method and application method thereof

Examples

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Embodiment 1

[0032] The catalyst of this embodiment is mainly made of the following raw materials in weight percentage: 70% of alumina, 30% of modified hydrogen EU-1 molecular sieve; the modified hydrogen EU-1 molecular sieve is hydrogen modified by citric acid EU-1 molecular sieve, modified SiO of the aforementioned hydrogen type EU-1 molecular sieve 2 / Al 2 o 3 The molar ratio is 40, and the grain size is 0.8 μm to 1 μm; the preparation process of the modified hydrogen EU-1 molecular sieve is as follows: the hydrogen EU-1 molecular sieve is treated with citric acid solution at 85 °C for 4 hours, and the modified hydrogen EU-1 molecular sieve is obtained. Hydrogen type EU-1 molecular sieve; the mass concentration of the citric acid solution is 1.0%, and the mass ratio of the citric acid solution to the hydrogen type EU-1 molecular sieve is 6:1.

[0033] The specific preparation process of the catalyst in this example is: kneading alumina, modified hydrogen EU-1 molecular sieve and dilut...

Embodiment 2

[0044] The catalyst of this embodiment is mainly made of the following raw materials in weight percentage: 50% of alumina, 50% of modified hydrogen EU-1 molecular sieve; the modified hydrogen EU-1 molecular sieve is hydrogen modified by citric acid EU-1 molecular sieve, modified SiO of the aforementioned hydrogen type EU-1 molecular sieve 2 / Al 2 o 3 The molar ratio is 60, and the grain size is 0.5 μm to 1 μm; the preparation process of the modified hydrogen EU-1 molecular sieve is as follows: the hydrogen EU-1 molecular sieve is treated with citric acid solution at 80 °C for 5 hours, and the modified hydrogen EU-1 molecular sieve is obtained. Hydrogen type EU-1 molecular sieve; the mass concentration of the citric acid solution is 0.8%, and the mass ratio of the citric acid solution to the hydrogen type EU-1 molecular sieve is 8:1.

[0045] The specific preparation process of the catalyst in this example is: kneading alumina, modified hydrogen EU-1 molecular sieve and dilut...

Embodiment 3

[0050] The catalyst of this embodiment is mainly made of the following raw materials in weight percentage: 30% of alumina, 70% of modified hydrogen EU-1 molecular sieve; the modified hydrogen EU-1 molecular sieve is hydrogen modified by citric acid EU-1 molecular sieve, modified SiO of the aforementioned hydrogen type EU-1 molecular sieve 2 / Al 2 o 3 The molar ratio is 80, and the grain size is 0.5 μm to 1 μm; the preparation process of the modified hydrogen EU-1 molecular sieve is as follows: the hydrogen EU-1 molecular sieve is treated with citric acid solution at 90 °C for 3 hours, and the modified hydrogen EU-1 molecular sieve is obtained. Hydrogen type EU-1 molecular sieve; the mass concentration of the citric acid solution is 1.2%, and the mass ratio of the citric acid solution to the hydrogen type EU-1 molecular sieve is 5:1.

[0051] The specific preparation process of the catalyst in this example is: kneading alumina, modified hydrogen EU-1 molecular sieve and dilut...

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Abstract

The invention discloses a catalyst used for an alkylation reaction. The catalyst is mainly prepared from following raw materials comprising, by weight, 30-70% of aluminium oxide and 30-70% of a modified hydrogen-type EU-1 molecular sieve which is a hydrogen-type EU-1 molecular sieve modified by citric acid. In addition, the invention discloses a preparation method of the catalyst. The method includes following steps: kneading the raw materials, performing an extrusion moulding process, carrying out a roasting process, and carrying out a cooling process to obtain the catalyst used for an alkylation reaction. The invention further discloses an application of the catalyst in catalysis of the alkylation reaction of benzene / methylbenzene and ethylene. The catalyst is used for preparing p-toluene ethylene through the alkylation reaction of the methylbenzene and the ethylene, or preparing ethylbenzene through the alkylation reaction of the benzene and the ethylene. By means of the catalyst, side reactions, such as transalkylation and the like, can be greatly inhibited while high conversion rates of the benzene and the methylbenzene can be obtained. A selectivity of a reaction product to methylethylbenzene or ethylbenzene is increased and conversion rates of the benzene or the methylbenzene are increased.

Description

technical field [0001] The invention belongs to the technical field of petrochemical catalysts, and in particular relates to a catalyst for alkylation reaction and its preparation method and application. Background technique [0002] Alkylaromatics are widely used intermediate products, among which the more important ones include ethylbenzene, methylethylbenzene, diethylbenzene and cumene. Ethylbenzene is the key raw material for the production of styrene, and styrene is an important monomer for the synthesis of polymer materials. It is widely used in the preparation of styrene and its copolymers ABS resin, AS resin, butene rubber and unsaturated polyester. P-methylethylbenzene is an important raw material for preparing p-methylstyrene, p-methylethylbenzene can be dehydrogenated to obtain p-methylstyrene, which can be polymerized to produce a new type of plastic, polymethylstyrene. , heat resistance, transparency and shrinkage are superior to existing polystyrene plastics. ...

Claims

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Application Information

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IPC IPC(8): B01J29/70C07C15/02C07C2/66C07C15/073
CPCY02P20/52
Inventor 顾建峰崔楼伟钱晓磊王新星袁岚
Owner XIAN ORIGIN CHEM TECH
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