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Benzene and synthesis gas alkylation catalyst as well as preparation method and application thereof

A catalyst and fluoroalkane technology, applied in the field of benzene and synthesis gas alkylation catalyst and its preparation, can solve the problems of uneven distribution of metals and acid centers, low selectivity of light aromatics, low reactivity, etc., and achieve the source of raw materials Sufficient, improved conversion rate, simple preparation method

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst prepared by this method has uneven distribution of metal and acid sites, resulting in low reactivity and low selectivity of light aromatics

Method used

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  • Benzene and synthesis gas alkylation catalyst as well as preparation method and application thereof
  • Benzene and synthesis gas alkylation catalyst as well as preparation method and application thereof
  • Benzene and synthesis gas alkylation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0063] Preparation of vector a.

[0064] SiO 2 / Al 2 o 3 65g of hydrogen ZSM-5 molecular sieve with a molar ratio of 27, SiO 2 / Al 2 o 3 5g of hydrogen-type EU-1 molecular sieve with a molar ratio of 35 and 42.9g of macroporous pseudoboth aluminum powder (HY-78) were thoroughly mixed, and then 50mL of dilute nitric acid with a concentration of 3.5% by mass was added, kneaded and then extruded into strands. Dry at 120° C. for 4 hours, and bake at 540° C. for 4 hours in an air atmosphere to obtain a carrier, which contains 65% by mass of HZSM-5, 5% by mass of HEU-1 and 30% by mass of macroporous γ-alumina.

[0065]The above-mentioned carrier was subjected to steam treatment at 440° C. for 4 hours, and then dried at 120° C. for 4 hours to obtain carrier a.

preparation example 2

[0067] Preparation of vector b.

[0068] SiO 2 / Al 2 o 3 50g of hydrogen ZSM-5 molecular sieve with a molar ratio of 38, SiO 2 / Al 2 o 3 10 g of hydrogen-type EU-1 molecular sieve with a molar ratio of 70 and 57.1 g of macroporous pseudo-both aluminum powder (HY-78) were thoroughly mixed, and then 90 mL of dilute nitric acid with a concentration of 3.5% by mass was added, kneaded, and then extruded. Dry at 120° C. for 4 hours, and bake at 540° C. for 4 hours in an air atmosphere to obtain a carrier, which contains 50 mass percent of HZSM-5, 10 mass percent of HEU-1 and 40 mass percent of macroporous γ-alumina.

[0069] The above-mentioned support was subjected to steam treatment at 460° C. for 2 h, and then dried at 120° C. for 4 h to obtain the support b.

preparation example 3

[0071] Preparation of vector c.

[0072] SiO 2 / Al 2 o 3 30g of hydrogen ZSM-5 molecular sieve with a molar ratio of 70, SiO 2 / Al 2 o 3 20g of hydrogen-type EU-1 molecular sieve with a molar ratio of 25 and 71.4g of macroporous pseudoboth aluminum powder (HY-78) were thoroughly mixed, and then 100mL of dilute nitric acid with a concentration of 3.5% by mass was added, kneaded, and then extruded. Dry at 120° C. for 4 hours, and bake at 540° C. for 4 hours in an air atmosphere to obtain a carrier, which contains 30 mass percent of HZSM-5, 20 mass percent of HEU-1 and 50 mass percent of macroporous γ-alumina.

[0073] The above-mentioned support was subjected to steam treatment at 480° C. for 6 h, and then dried at 120° C. for 4 h to obtain the support c.

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Abstract

The invention relates to a benzene and synthesis gas alkylation catalyst and a preparation method and application thereof. The catalyst carrier adopts two composite molecular sieves, optimizes the pore structure and acid distribution of the catalyst, has the advantages of high catalytic activity and good selectivity, and adopts macroporous alumina as a binder to increase the specific surface area and pore volume of the catalyst, improve the mass transfer and heat transfer effects of the catalyst, and improve the catalytic activity of the catalyst. The conversion rate of benzene and the selectivity and yield of methylbenzene and C8 aromatic hydrocarbon are improved, and the preparation method is simple, sufficient in raw material source, low in cost, easy to operate and suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to the field of alkylation of benzene and synthesis gas, in particular to a catalyst for the alkylation of benzene and synthesis gas as well as its preparation method and application. Background technique [0002] Benzene, toluene and xylene (BTX) among aromatic hydrocarbons are important basic chemical raw materials. Toluene and xylene, especially p-xylene, and their derivatives are widely used in chemical products such as polyester, petrochemical, plastic and rubber. With the rapid development of my country's ethylene, reforming and coal chemical industries in recent years, the domestic production of pure benzene is gradually increasing; The 1% of the National V standard has dropped to 0.8% of the National VI standard, and it is difficult for benzene to be used as a blending component of gasoline. [0003] my country is a country with "more coal and less oil". The coal reserves are huge and the price is low. The development of ...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J37/10B01J37/02B01J37/08B01J35/10C07C2/86C07C15/06C07C15/08
CPCC07C2/862B01J29/80B01J37/10B01J37/0201B01J37/088B01J37/0009B01J29/46B01J29/48B01J29/405B01J29/7073B01J29/7646B01J29/7846B01J2229/186C07C2529/80B01J35/615B01J35/635B01J35/695C07C15/06C07C15/08Y02P20/52
Inventor 王京刘中勋周震寰康承琳梁战桥王志强岳欣盖月庭
Owner CHINA PETROLEUM & CHEM CORP
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