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Preparation method of cumene

A technology of cumene and dimethyl benzyl alcohol, applied in the field of hydrogenolysis α, can solve the problems of high price, low activity, environmental pollution, etc., and achieve good technical effects

Inactive Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of high price when Pd catalyst is used to prepare cumene in the prior art, the problem of low activity and serious environmental pollution when CuCr catalyst is used, and a new method for preparing cumene is provided

Method used

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  • Preparation method of cumene
  • Preparation method of cumene
  • Preparation method of cumene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 10.0g of pseudoboehmite powder to 100.0g of water, add 2.0g of concentrated nitric acid, and peptize at 70°C for 24 hours to obtain alumina sol. Get 23.4g basic nickel carbonate and 100.0g ammonia water and add 100.0g water to prepare nickel ammonia complex solution. Add the nickel ammonia complex solution to the aluminum sol, add sodium carbonate to adjust the pH of the solution to 9 and age for 12 hours, then heat and decompose at 70-120°C for 12 hours, wash, filter and dry to obtain the catalyst precursor. 5.0gMg(NO 3 ) 2 ·6H 2 The solution made of O and 20.0g water is impregnated on the precursor, and the weight percentage is 30%NiO-5%MgO-65%Al after roasting. 2 o 3 catalyst. After the catalyst is reduced by hydrogen at 450°C, the content of α,α-dimethylbenzyl alcohol is 25.0%, and the content of cumene is 75.0% as raw materials, and the reaction pressure is 0.1MPa, H 2 / α, the volume ratio of α-dimethylbenzyl alcohol is 400, and the volume space velocity ...

Embodiment 2～10

[0018] Catalysts 2 to 10 were prepared according to the steps in Example 1, except that the material composition and preparation conditions were changed. The preparation conditions and material composition of the catalysts were shown in Table 1, and the hydrogenolysis evaluation results were shown in Table 2.

[0019] Table 1 The composition and preparation conditions of each catalyst

[0020]

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Abstract

The invention relates to a method for production of cumene through hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol, and aims to mainly solve the problems that a Pd catalyst is expensive, and a CuCr catalyst has low activity and causes serious environmental pollution during cumene production in the prior art. The method of the invention adopts a technical scheme composed of: taking hydrogen and alpha, alpha-dimethyl benzyl alcohol as raw materials, adopting cumene as a solvent, and under the conditions of a volume ratio of hydrogen to alpha, alpha-dimethyl benzyl alcohol of 100-500:1, a reaction temperature of 100-180DEG C, a reaction pressure of 0.1-5.0MPa, and a liquid-phase volume space velocity of 1-10.0h<-1>, contacting the raw materials with a catalyst in a fixed bed reactor to generate cumene. Specifically, the catalyst comprises the following components by weight: a) 10.0-45.0% of NiO; b) 45.0-75.0% of Al2O3; and c) 3.0-15.0% of at least one of MgO, CaO, BaO or ZrO2. The technical scheme of the invention well solve the problems, and can be used for industrial production of cumene through hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol.

Description

technical field [0001] The invention relates to a method for producing cumene, in particular to a method for hydrogenolyzing α,α-dimethylbenzyl alcohol to produce cumene. Background technique [0002] Propylene oxide is the third largest propylene derivative besides polypropylene and acrylonitrile. It is an important raw material for basic organic chemical synthesis, mainly used in the production of polyether and propylene glycol. The largest use of polyether polyols is the production of polyurethane plastics; secondly, they are used as surfactants, lubricants, hydraulic fluids, heat exchange fluids and quenching agents, latex foaming agents, various cutting and drawing agent components and special solvent etc. Propylene oxide in my country is mainly used to produce polyether polyols. The second largest use is for the production of propylene glycol, alcohol ether, and propylene carbonate, which can then be used to manufacture storage tanks, bathroom equipment, and ship hul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/085C07C5/03B01J23/78
CPCY02P20/52
Inventor 王辉刘仲能王德举任杰
Owner CHINA PETROLEUM & CHEM CORP
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