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Method for preparing cyclohexanone by phenol hydrogenation

A technology for the preparation of cyclohexanone and hydrogen, which is applied in the hydrogenation preparation of aromatic hydroxyl compounds, carbon-based compound preparation, chemical instruments and methods, etc., can solve the problems of low conversion rate and selectivity, achieve convenient separation and improve economic efficiency Effect

Active Publication Date: 2019-12-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the catalysts reported in the above-mentioned patents and documents are used for the industrial production of cyclohexanone and still have the disadvantages of low conversion rate and selectivity

Method used

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  • Method for preparing cyclohexanone by phenol hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 27 g γ-Al 2 o 3 and 3 grams of α-Al 2 o 3 powder mixed with PdCl 2 The Pd / alumina catalyst (catalyst A1) was obtained by impregnating with an aqueous solution (w(Pd)=0.1%), drying and reducing.

Embodiment 2

[0025] 27 g γ-Al 2 o 3 and 3 grams of α-Al 2 o 3 powder mixed with PdCl 2 The Pd / alumina catalyst (catalyst A2) was prepared by impregnating with an aqueous solution (w(Pd)=0.3%), drying and reducing.

Embodiment 3

[0027] 27 g γ-Al 2 o 3 and 3 grams of α-Al 2 o 3 powder mixed with PdCl 2 The Pd / alumina catalyst (catalyst A3) was prepared by impregnating in an aqueous solution (w(Pd)=0.5%), drying and reducing.

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Abstract

The invention relates to a method for preparing cyclohexanone by phenol hydrogenation. The method comprises the step as follows: raw material phenol makes contact with a catalyst to prepare cyclohexanone under a hydrogen reaction condition, wherein the catalyst contains 95wt%-99.9wt% of a carrier and 0.1wt%-5wt% of Pd in terms of total weight of the carrier and Pd; and the carrier contains aluminum oxide in at least two crystal forms, wherein the content of gamma-Al2O3 is 60wt%-99wt% in terms of total weight of the carrier and Pd. The method can be applied to industrial production of preparation of cyclohexanone by phenol hydrogenation.

Description

technical field [0001] The invention relates to a method for preparing cyclohexanone by hydrogenating phenol. Background technique [0002] Cyclohexanone is an important organic chemical raw material for synthetic fiber nylon 6 and nylon 66 monomer caprolactam and adipic acid, and it is also widely used in the fields of medicine, coatings and dyes. [0003] Cyclohexane oxidation is the most commonly used chemical process at home and abroad, but this process has problems such as low conversion rate of cyclohexane, low selectivity of cyclohexanone, serious three wastes in the process, low catalyst utilization rate and difficult separation. The phenol hydrogenation method has the advantages of short production process, high yield of cyclohexanone, and stable technology, and this process is safer than the cyclohexane oxidation method, which has made this method more competitive in recent years. The process of preparing cyclohexanone by gas-phase hydrogenation of phenol is an ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/00C07C49/403
CPCC07C45/006C07C2601/14C07C49/403
Inventor 尤陈佳王高伟高焕新
Owner CHINA PETROLEUM & CHEM CORP
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