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Catalyst for producing alpha, alpha-dimethyl benzyl alcohol by hydrogenation of cumene hydroperoxide and preparation method thereof

A technology of cumene hydroperoxide and dimethyl benzyl alcohol, which is applied in the field of catalysts and its preparation, and can solve the problems of poor stability of Pd catalysts and the like

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

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Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the prior art, in the process of hydrogenating cumene hydroperoxide as a raw material to produce α, α-dimethylbenzyl alcohol, there is a problem that the stability of the Pd catalyst is not good. Provide A new catalyst for the hydrogenation of cumene hydroperoxide to produce α,α-dimethylbenzyl alcohol

Method used

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  • Catalyst for producing alpha, alpha-dimethyl benzyl alcohol by hydrogenation of cumene hydroperoxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Formed Al 2 o 3 After drying at 120°C for 6 hours and calcining at 600°C for 4 hours to obtain a carrier (specific surface is 208m 2 / g, the pore volume is 0.78mL / g, and the average pore diameter is 12.5nm). The carrier is impregnated with the mixed salt solution containing the required amount of Pb, Na and Pd components, dried at 120°C for 4 hours and calcined at 550°C for 4 hours to obtain a weight percentage of 0.1%Pd-0.1%Pb-0.1%Na / Al 2 o 3 Catalyst a.

Embodiment 2

[0015] Formed Al 2 o 3 After drying at 120°C for 6 hours and calcining at 750°C for 4 hours to obtain a carrier (specific surface is 200m 2 / g, the pore volume is 0.69mL / g, and the average pore diameter is 13.2nm). Impregnate the carrier with the mixed salt solution containing the required amount of Pd, Sn and In components and dry at 120°C for 4 hours, then impregnate the carrier with the mixed solution containing the required amount of K and Mg components, and dry at 120°C for 4 hours Hours and 550 ° C for 4 hours to produce 0.5% Pd-2.0% Sn-1.0% In-0.5% K-1.5% Mg / SiO in terms of weight percentage 2 Catalyst b.

Embodiment 3

[0017] Al after molding 2 o 3 After drying at 120°C for 6 hours and calcining at 1200°C for 2 hours to obtain a carrier (specific surface is 75m 2 / g, the pore volume is 0.28mL / g, and the average pore diameter is 24.6nm). The carrier is impregnated with the solution containing the required amount of Mg component, dried at 120°C for 4 hours, then impregnated with the mixed solution containing the required amount of Pd and Pb, dried at 120°C for 4 hours and calcined at 550°C for 4 hours. 0.5%Pd-1.0%Pb-10.0%Mg / Al by weight 2 o 3 Catalyst c.

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Abstract

The invention relates to a catalyst for producing alpha, alpha-dimethyl benzyl alcohol by hydrogenation of cumene hydroperoxide and a preparation method thereof, mainly solving the problem of poor Pd catalyst stability in the process of producing the alpha, alpha-dimethyl benzyl alcohol in the prior art. In the invention, the adopted technical scheme is as follows: the catalyst comprises the following components in percentage by weight: (a) 0.1-2.0% of mixture selected from metals or oxides of Pd, (b) 85.0-99.7% of at least one of aluminum oxide and silicon oxide, (c) 0.1-5.0% of at least oneof metals or oxides of Sn, Pb or In, and (d) 0.1-10.0% of at least one of metals or oxides of Na, K, Cs, Mg, Ca or Ba. The invention provides the preparation method of the catalyst, thereby better solving the problem in the prior art. The invention can be used for industrially producing the alpha, alpha-dimethyl benzyl alcohol by the hydrogenation of cumene hydroperoxide.

Description

technical field [0001] The invention relates to a catalyst for preparing α, α-dimethylbenzyl alcohol by hydrogenating cumene hydroperoxide and a preparation method thereof. Background technique [0002] α, α-Dimethylbenzyl alcohol is an important fine chemical raw material, which can be used to synthesize dicumyl hydroperoxide and fragrances of different flavors. Usually in industry, α, α-dimethylbenzyl alcohol is produced by reducing cumene hydroperoxide with sulfide, and the α produced in this way, α-dimethylbenzyl alcohol is often polluted by sulfide, which is harmful to the follow-up Negative impact on the use process. The production of α,α-dimethylbenzyl alcohol by hydrogenation of cumene hydroperoxide is a clean and environmentally friendly production method, and the water generated in the reaction can be removed by simple separation operation. [0003] Japanese patent JP55167238 discloses a Pd metal with a specific surface of 100-200m 2 / g Pd / Al 2 o 3 The prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J35/10B01J37/02C07C33/20C07C29/132
Inventor 汪哲明王辉马静萌刘仲能
Owner CHINA PETROLEUM & CHEM CORP
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