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Method for preparing o-alkoxyphenol from epoxy cyclohexane

A technology for o-alkoxyphenol and epoxy cyclohexane, applied in the field of preparing o-alkoxyphenol, can solve the problems of many side reactions, low yield, poor selectivity, etc., and achieves the effect of simple process

Inactive Publication Date: 2014-10-01
YUEYANG CHANGDE CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is an important reaction to synthesize diphenol derivatives through dehydrogenation of cyclohexanediol derivatives as a bridge. The existing methods for synthesizing cyclohexanediol derivatives are usually synthesized using catechol as a raw material. The conditions of this kind of reaction are harsh, and there are many side reactions, the selectivity is poor, and the yield is not high
In particular, the dehydrogenation method of derivatives of cyclohexanediol containing ether bonds has not been reported

Method used

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  • Method for preparing o-alkoxyphenol from epoxy cyclohexane
  • Method for preparing o-alkoxyphenol from epoxy cyclohexane
  • Method for preparing o-alkoxyphenol from epoxy cyclohexane

Examples

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Effect test

Embodiment 1

[0042] Under alcoholysis conditions, contact epoxycyclohexane and methanol with an alcoholysis catalyst to separate and obtain o-methoxycyclohexanol; wherein, the alcoholysis conditions include: the temperature is 60°C, the alcoholysis catalyst and epoxycyclohexane The mass ratio of alkane is 0.05:1, the alcoholysis catalyst is sodium bisulfate, and the molar ratio of epoxycyclohexane to methanol is 1:3; the selectivity of o-methoxycyclohexanol is 96%, and the conversion of epoxycyclohexane The rate is 98.1%.

Embodiment 2

[0044] Under alcoholysis conditions, contact epoxycyclohexane and ethanol with an alcoholysis catalyst to separate and obtain o-ethoxycyclohexanol; wherein, the alcoholysis conditions include: the temperature is 80°C, the alcoholysis catalyst and epoxycyclohexane The mass ratio of alkane is 0.01:1, the alcoholysis catalyst is phosphoric acid, and the molar ratio of epoxycyclohexane to ethanol is 1:20; the selectivity of o-ethoxycyclohexanol is 96%, and the conversion rate of epoxycyclohexane is 99.3% %.

Embodiment 3-6

[0046] Prepare other o-alkoxy cyclohexanols according to the method of Example 1, the difference is that the alcohols used are n-propanol, n-butanol, cyclohexanol, n-octanol, and finally prepare o-n-propoxy cyclohexanol Hexanol, o-n-butoxycyclohexanol, o-cyclohexyloxycyclohexanol, o-n-octyloxycyclohexanol.

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Abstract

The invention provides a method for preparing o-alkoxyphenol from epoxy cyclohexane. The method comprises the following steps: (1) under an alcoholysis condition, contacting epoxy cyclohexane and alcohol with a catalyst, and separating so as to obtain o-alkoxyphenol; (2) under a catalytic dehydrogenation condition, contacting the o-alkoxyphenol with a dehydrogenation catalyst, whose active component comprises the VIII group metal elements. The method can synthesize o-alkoxyphenol directly from epoxy cyclohexane, and furthermore has the advantages of simple process and high efficiency.

Description

technical field [0001] The invention relates to a method for preparing o-alkoxyphenol from epoxycyclohexane. Background technique [0002] There are many derivatives of cyclohexanediol, many of which are important chemical intermediates. It is an important reaction to synthesize diphenol derivatives through dehydrogenation of cyclohexanediol derivatives as a bridge. The existing methods for synthesizing cyclohexanediol derivatives are usually synthesized using catechol as a raw material. The conditions of this kind of reaction are harsh, and there are many side reactions, the selectivity is poor, and the yield is not high. In particular, there is no report on the dehydrogenation method of derivatives of cyclohexanediol containing ether bonds. Contents of the invention [0003] The purpose of the present invention is to provide a kind of method of preparing o-alkoxyphenol by epoxy cyclohexane on the basis of prior art. [0004] The inventors of the present invention have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/18C07C43/23
CPCC07C41/03C07C41/18C07C2601/14C07C43/23C07C43/196
Inventor 蒋卫和屈铠甲何嘉勇肖海军郑红翠王德清姜红军陈青祥林民汪燮卿
Owner YUEYANG CHANGDE CHEM IND
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