Copper catalyst for preparing isopropyl benzene by alpha, alpha-dimethyl benzyl alcohol hydrogenolysis and preparation method thereof

A technology of dimethyl benzyl alcohol and copper catalysts, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, and can solve problems such as poor stability

Inactive Publication Date: 2011-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the copper catalyst prepared by the prior art is applied to α, the problem of poor stability when α-dimethylbenzyl alcohol is hydrogenated to produce cumene, and a new α, α - Copper catalyst for the hydrogenolysis of dimethyl benzyl alcohol to produce cumene

Method used

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  • Copper catalyst for preparing isopropyl benzene by alpha, alpha-dimethyl benzyl alcohol hydrogenolysis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix the required amount of alumina and water to make slurry to obtain slurry I, drop the required amount of copper nitrate, zinc nitrate and manganese nitrate mixed solution and sodium carbonate aqueous solution into the slurry A at the same time for co-precipitation, the precipitation temperature is 70 ° C , control the pH value of the solution to 6.5, after the precipitation is completed and age at 70°C for 2 hours, then the precipitate is washed, filtered and dried at 120°C for 4 hours, and roasted at 400°C for 4 hours, and baked with 2% graphite of solid weight, After 10% of the water phase is mixed, the compression molding obtains the catalyst a (the composition of the catalyst is 55.0%CuO-20.0%ZnO%-24.0%Al in weight percent 2 o 3 -1.0%MnO 2 ).

Embodiment 2

[0020] Catalyst b (catalyst composition is 20.0%CuO-50.0%ZnO-25.0%Al in weight percent 2 o 3 -5.0%MnO 2 ), the precipitation temperature is 80° C., the pH value of the control solution is 8.0, and all the other steps and parameters are the same as in Example 1.

Embodiment 3

[0022] Catalyst c (the composition of catalyst is 30.0%CuO-20.0%ZnO%-45.0%Al in weight percent 2 o 3 -1.5%MnO 2 -3.5%TiO 2 ), the precipitation temperature is 90° C., the pH value of the control solution is 8.0, and all the other steps and parameters are the same as in Example 1.

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Abstract

The invention relates to a copper catalyst for preparing isopropyl benzene by alpha, alpha-dimethyl benzyl alcohol hydrogenolysis and a preparation method thereof, and mainly solves the problem of poor stability of the Cu catalyst prepared in the prior art. The invention well solves the problem by adopting the technical schemes of the catalyst and the preparation method thereof, wherein the catalyst comprises the following components in percentage by weight: 20.0 to 55.0 percent of CuO, 15.0 to 50.0 percent of ZnO, 10.0 to 45.0 percent of Al2O3 and 1.0 to 20.0 percent of at least one of MnO2, TiO2 and ZrO2; and the catalyst can be used in the industrial production of producing the isopropyl benzene by the alpha, alpha-dimethyl benzyl alcohol hydrogenolysis.

Description

technical field [0001] The invention relates to a copper catalyst for preparing cumene by hydrogenolysis of α,α-dimethylbenzyl alcohol and a preparation method thereof. Background technique [0002] Propylene oxide is an important petrochemical organic raw material. At present, the main production methods of propylene oxide are chlorohydrin method and ethylbenzene peroxide method. The ethylbenzene peroxide method uses ethylbenzene peroxide as an oxidizing agent to oxidize propylene to propylene oxide. Although this process can avoid the advantages of high investment and long process of chlorohydrin method of serious environmental pollution, it also has a shortcoming, a large amount of co-production by-product-styrene will be generated in the process, so that the propylene oxide of this technical route The cost of production will be affected by fluctuations in the price of co-products. With cumene hydroperoxide as the oxygen source, propylene oxide can also be oxidized to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/80B01J37/03C07C15/085C07C1/20
CPCY02P20/52
Inventor 汪哲明马静萌王辉刘仲能
Owner CHINA PETROLEUM & CHEM CORP
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