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Catalyst for synthesizing iso-propylbenzene

A technology of catalyst and cumene, which is applied in the field of catalysts for synthesizing cumene, can solve the problems of poor stability, high benzene-to-hydrocarbon ratio, high catalyst reaction temperature, etc., and achieve improved reaction stability, good technical effect, and improved dealumination phenomenon Effect

Active Publication Date: 2007-10-03
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 in the prior art that the reaction temperature of the catalyst is high, the ratio of benzene to hydrocarbon is high, and the stability is poor, and a new catalyst for synthesizing cumene is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Synthesize beta molecular sieve according to the method described in CN1249270A, exchange the synthetic molecular sieve with ammonium nitrate to wherein the alkali metal ion content is less than 100ppm, get 200 grams of above-mentioned molecular sieves and add 500 milliliters of analytically pure strong ammonia water, add 40 grams of four Dissolve ethylammonium bromide and 5 grams of sodium aluminate, add 500 milliliters of deionized water and continue stirring for 10 minutes, then transfer to a 2000 milliliter autoclave, heat up to 150 °C for 2 hours, wash the sample with deionized water until ph=8~ 9.

Embodiment 2

[0022] Get 100 grams of molecular sieves processed in the above example 1, mix evenly with 25 grams of aluminum oxide, 10 grams of zinc oxide, 5 grams of zirconium oxide, and 5 grams of titanium oxide, add 160 milliliters of 5% (weight) nitric acid solution, 5 grams of Tianqi The powder was kneaded for 2 hours and then extruded into rods. The formed catalyst was dried at 150°C, and then heated to 580°C for 4 hours in an air atmosphere to obtain a finished catalyst.

Embodiment 3

[0024] The catalyst prepared in Example 2 was pulverized into 20-60 mesh particles, and 1.0 g of the catalyst was carried out in a fixed-bed reactor for liquid-phase alkylation of propylene. The reaction conditions were: propylene space velocity=2.5 hours -1 , temperature of reaction=150 ℃, reaction pressure=2.7MPa, reaction product is isopropyl benzene, propylene transformation rate=100%, product propyl group selectivity is greater than 99.2%, and total benzene-hydrocarbon ratio is 2.1 (mol), and reaction is not completed in 3000 hours A loss of catalyst activity was observed, and the outlet cumene concentration reached 44%.

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Abstract

A catalyst for synthesizing isopropylbenzene with low reaction temp (120-170 deg.C) and benzene / hydrocarbon ratio (2-5) and high stability is a modified molecular sieve.

Description

technical field [0001] The invention relates to a catalyst for synthesizing cumene. 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-alkylation, the catalyst is highly corrosive, polluted heavily and post-treatment is complicated. [0003] Molecular sieve liquid-phase alkylation method has mild reaction conditions, high conve...

Claims

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Application Information

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IPC IPC(8): B01J29/06C07C2/66C07C15/085
CPCY02P20/52
Inventor 周斌高焕新方华顾瑞芳魏一伦
Owner CHINA PETROLEUM & CHEM CORP
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