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Method for producing alkyl benzene

A technology of alkylbenzene and zeolite, which is applied in the field of production of alkylbenzene, can solve the problems of high benzene-to-hydrocarbon ratio and high reaction temperature, and achieve the effects of reducing oligomerization reaction, improving reaction stability, and inhibiting carbon deposition

Inactive Publication Date: 2005-07-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that there are problems of high reaction temperature and high benzene-hydrocarbon ratio in the preparation of alkylbenzene in the above-mentioned documents, and a new method for producing alkylbenzene is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get 100 grams (dry basis) the beta type zeolite former powder that silicon-aluminum mol ratio is 20, exchange with 1N ammonium chloride, make the Na in the zeolite + The ion content is less than 0.05% by weight. Mix the above-treated zeolite with 100 g of γ-alumina, add 200 ml of 1N nitric acid, knead and extrude it into a shape of φ1.6×2 mm, and dry it at 120°C. The above extruded product was steamed at 500°C for 0.5 hours -1 Treat for 2 hours, cool and place in 1N oxalic acid solution at 50°C for 48 hours, wash with distilled water until neutral, and dry.

Embodiment 2

[0022] Get 100 grams (dry basis) the beta type zeolite former powder that silicon-aluminum mol ratio is 20, exchange with 1N ammonium nitrate, make the Na in the zeolite + The ion content is less than 0.05% by weight. Mix the above-treated zeolite with 100 g of γ-alumina, add 200 ml of 1N nitric acid, knead and extrude it into a shape of φ1.6×2 mm, and dry it at 120°C. The above extruded product was steamed at 450°C for 0.5 hours -1 Treat for 5 hours, cool and place in 1N oxalic acid solution at 50°C for 48 hours, wash with distilled water until neutral, and dry.

Embodiment 3

[0024] Get 100 grams (dry basis) the beta type zeolite former powder that silicon-aluminum mol ratio is 30, exchange with 1N ammonium phosphate, make the Na in the zeolite + The ion content is less than 0.05% by weight. Mix the above-treated zeolite with 100 g of γ-alumina, add 200 ml of 1N nitric acid, knead and extrude it into a shape of φ1.6×2 mm, and dry it at 120°C. The above extruded product was steamed at 550°C for 0.5 hours -1 Treat for 2 hours, after cooling, place in 0.5N oxalic acid solution, soak for 48 hours at 50°C, wash with distilled water until neutral, and dry.

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Abstract

The present invention relates to alkylbenzene producing process and aims at lowering catalytic reaction temperature and reducing benzene-to-hydrocarbon ratio. The technological scheme is adopted, in which catalyst is prepared through high temperature vapor treatment and soaking in organic acid and the technological conditions include reaction temperature of 110-200 deg.c, reaction pressure of 0.5-3.0 MPa and benzene-to-hydrocarbon ratio of 2-10 in liquid phase. The present invention may be used in producing alkylbenzene.

Description

technical field [0001] This invention relates to a process for the production of alkylbenzenes, and more particularly, the present invention relates to a process for the production of alkylbenzenes using a zeolite catalyst treated with a combination of steam and an organic acid. Background technique [0002] Cumene is an important intermediate raw material for the production of phenol, acetone and α-methylstyrene. At present, more than 90% of phenol in the world is produced by the cumene method. The traditional method of producing cumene in industry has the solid phosphoric acid method (SPA method) of U.S. Universal Oil Company (UOP) and the improved AlCl of Monsanto / Lummus Crest company 3 Law. The operating conditions of SPA are harsh and there are many impurities, so the yield of cumene cannot be increased by anti-alkylation. while AlCl 3 Although the method has milder reaction conditions and can increase the yield of cumene through anti-a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/66C07C15/02
Inventor 周斌高焕新方华顾瑞芳季树芳
Owner CHINA PETROLEUM & CHEM CORP
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