Catalyst containing MCM-22 zeolite

A technology of MCM-22 and catalyst, which is applied in molecular sieve catalysts, physical/chemical process catalysts, crystalline aluminosilicate zeolites, etc., can solve the problems of low activity and achieve the goal of prolonging the operation period, reducing selectivity and improving utilization rate Effect

Active Publication Date: 2005-08-03
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

MCM-22 zeolite catalyst is more selective than Beta zeolite catalyst, but its activity is lower than the latter
[0004] In the Proceedings of Science and Technology in Catalysis 1998 in 1998, J.C. CHENG and others compared the application of USY, Beta, and MCM-22 zeolite catalysts in the liquid-phase alkylation reaction of benzene and ethylene. Among the catalysts, the MCM-22 zeolite catalyst has the best selectivity, but its activity is lower than that of the Beta zeolite catalyst
A.corma etc. also think that the activity of MCM-22 zeolite catalyst is lower than that of Beta zeolite catalyst in the article published in Journal ofCatalysis192,163-173 (2000)
[0005] At present, there is no report on further improving the activity and selectivity of the benzene liquid-phase alkylation catalyst containing MCM-22 zeolite in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 80g NH 4 NO 3 (chemically pure, Beijing Mengli Fine Chemicals Co., Ltd.) was dissolved in 3200ml deionized water, and after stirring evenly, 80g of MCM-22 zeolite (produced by Changling Catalyst Factory, SiO 2 / Al 2 o 3 =25,Na 2 O 0.5% by weight), exchanged at 90°C for 2 hours, then washed with 6400ml of deionized water, and dried at 120°C for 2 hours.

[0017] Get 43g MCM-22 zeolite and 22g matrix Al 2 o 3 (Manufactured by Wenzhou Catalyst Factory, Al 2 o 3 70% by weight) mixed, adding 0.49gNH 4 F (chemically pure, distributed by China Pharmaceutical Company Beijing Company), 1% by weight of HNO 3 and deionized water were mixed and kneaded on the extruder and then extruded to form catalyst strips with a diameter of 1.5mm, then dried at 120°C for 5 hours, then fired at 550°C in a muffle furnace for 3 hours, cooled to room temperature, and obtained Catalyst A with MCM-22 zeolite content of 70% by weight (theoretical value calculated on the basis of catalyst dr...

Embodiment 2

[0019] Get 43g MCM-22 zeolite and 22g matrix Al 2 o 3 (Manufactured by Wenzhou Catalyst Factory, Al 2 o 3 70% by weight) mixed, adding 0.97gNH 4 F (chemically pure, distributed by China Pharmaceutical Company Beijing Company), 1% by weight of HNO 3 and deionized water were mixed and kneaded on the extruder and then extruded to form catalyst strips with a diameter of 1.5mm, then dried at 120°C for 5 hours, then fired at 550°C in a muffle furnace for 3 hours, cooled to room temperature, and obtained Catalyst B with MCM-22 zeolite content of 70% by weight and fluorine content of 1.0% by weight.

Embodiment 3

[0021] Get 43g MCM-22 zeolite and 22g matrix Al 2 o 3 (Manufactured by Wenzhou Catalyst Factory, Al 2 o 3 70% by weight) mixed, adding 0.97gNH 4 F (chemically pure, distributed by China Pharmaceutical Company Beijing Company), and deionized water are mixed and kneaded on the extruder and then extruded to form catalyst strips with a diameter of 1.5mm, then dried at 120°C for 5 hours, and then dried in a Mafford furnace. It was fired at 550° C. for 3 hours and cooled to room temperature to obtain a catalyst C with an MCM-22 zeolite content of 70% by weight and a fluorine content of 1.0% by weight.

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Abstract

The present invention is a kind of catalyst containing MCM-22 zeolite 30-90 wt%, halogen counting in simple substance 0.1-2 wt% and alumina matrix in the balanced amount. The catalyst is used in liquid phase benzene alkylating reaction, and compared with available technology, the catalyst has raised ethyl benzene selectivity, lowered diethyl benzene and triethyl benzene selectivity, and 7.3-10.0 % raised ethyl benzene STY.

Description

technical field [0001] The invention relates to a catalyst containing MCM-22 zeolite, and more specifically relates to a catalyst containing MCM-22 zeolite for benzene liquid-phase alkylation reaction. Background technique [0002] Ethylbenzene is an important organic chemical raw material, mainly used in the production of styrene. Industrially, it is mainly produced through the alkylation reaction of benzene and ethylene. In its preparation method, traditional AlCl 3 The production process of French ethylbenzene has been replaced by a process using molecular sieve as a catalyst due to the strong corrosion of the catalyst on the equipment and the serious pollution to the environment. The molecular sieve gas-phase alkylation method is gradually replaced by the molecular sieve liquid-phase method because of the high reaction temperature and high xylene content. People call the molecular sieve liquid phase method an environmentally friendly process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70C01B39/06C01B39/48
Inventor 张凤美杜伟彦王卫东
Owner CHINA PETROLEUM & CHEM CORP
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