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Method for hydrating cyclohexene to prepare cyclohexanol

A cyclohexene hydration and cyclohexanol technology, which is applied in the preparation of hydroxyl compounds, organic compounds, and hydroxyl addition preparations, can solve the problems of chemical balance limitations, high energy consumption, and poor solvent and solubilization effects. Achieve the effects of simple process flow, low energy consumption and safe reagents

Active Publication Date: 2018-02-23
YANTAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art of poor solubilizing effect of solubilizer, high energy consumption and hydration reaction limited by chemical balance, the present invention provides a method for preparing cyclohexanol by hydrating cyclohexene

Method used

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  • Method for hydrating cyclohexene to prepare cyclohexanol
  • Method for hydrating cyclohexene to prepare cyclohexanol
  • Method for hydrating cyclohexene to prepare cyclohexanol

Examples

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Embodiment 1

[0023] Embodiment 1 cyclohexene hydration prepares cyclohexanol

[0024] Add 50% cyclohexanol, 25% water, and 25% acetonitrile solution to the reactor of the reactive distillation column, and reach 80% of the liquid level in the reactor of the reactive distillation column, add a certain amount of zeolite to prevent bumping, and heat the reactor , control the heating power of the catalytic distillation tower to 410w, and turn on the tower insulation switch to control the pressure inside the tower. When the temperature of the tower reaches 170°C, start feeding, and the feed molar ratio of water and cyclohexene is controlled at 3.0:1.0, the mol ratio of acetonitrile and cyclohexene is controlled at 9.0:1.0, the cyclohexene feed is 3mol / h, the feed temperature is room temperature, the water feed is 6mol / h, and the acetonitrile feed is 15mol / h h, the feed temperature of acetonitrile and water mixture is 80°C, until the reactive distillation column starts to reflux, stop feeding, th...

Embodiment 2

[0027] Embodiment 2 cyclohexene hydration prepares cyclohexanol

[0028]Add 50% cyclohexanol, 25% water, and 25% acetonitrile solution to the reactor of the reactive distillation tower, and reach 80% of the liquid level of the tower reactor, add a certain amount of zeolite to prevent bumping, heat the tower reactor, and control the catalytic concentration. The heating power of the distillation tower is 400w, and the insulation switch of the tower is turned on to control the pressure inside the tower. When the temperature of the tower reaches 170°C, the feed is started. The feed molar ratio of water and cyclohexene is controlled at 1.5:1.0. The mol ratio of acetonitrile and cyclohexene is controlled at 3.0:1.0, and cyclohexene feed is 3mol / h, and feed temperature is room temperature, and water feed rate is 4.5mol / h, and acetonitrile feed rate is 12mol / h, mixing Liquid feed temperature is 80 ℃, until the reactive distillation column starts to reflux, stop feeding, total reflux f...

Embodiment 3

[0031] Embodiment 3 cyclohexene hydration prepares cyclohexanol

[0032] Add 50% cyclohexanol, 25% water, and 25% acetonitrile solution to the reactor of the reactive distillation tower, and reach 80% of the liquid level of the tower reactor, add a certain amount of zeolite to prevent bumping, heat the tower reactor, and control the catalytic concentration. The heating power of the distillation tower is 430w, and the insulation switch of the tower is turned on to control the pressure inside the tower. When the temperature of the tower reaches 170°C, the feed is started, and the feed molar ratio of water to cyclohexene is controlled at 5.0:1.0. The mol ratio of acetonitrile and cyclohexene is controlled at 15.0:1.0, and cyclohexene feed is 3mol / h, and feed temperature is room temperature, and water feed rate is 9mol / h, and acetonitrile feed rate is 21mol / h, mixed liquid The feed temperature is 80°C, until the reactive distillation tower starts to reflux, stop feeding, and the t...

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Abstract

The invention belongs to the field of chemical synthesis, and discloses a method for hydrating cyclohexene to prepare cyclohexanol. The method is characterized in that acetonitrile is taken as a cosolvent, cyclohexene and water generate hydration reaction under action of a solid acid catalyst to generate cyclohexanol. According to the method for hydrating cyclohexene to prepare cyclohexanol disclosed by the invention, a cyclohexene conversion rate is high, the preparation method is simple, the process is circulating and continuous, the used reagents are safe, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a chemical synthesis method, in particular to a method for preparing cyclohexanol by hydrating cyclohexene. Background technique [0002] Cyclohexanol is an excellent chemical product with medium and high boiling points, and it is mainly used as an intermediate raw material for the production of important chemical products such as adipic acid and caprolactam. At present, the cyclohexene hydration method is the most promising method for producing cyclohexanol. The cyclohexene hydration method includes direct method and indirect method; the direct method is simpler than the indirect method, and cyclohexene is directly reacted with water to generate cyclohexanol. At present, the most mature direct hydration process of cyclohexene was developed by Asahi Kasei Corporation of Japan. In 1986, after a large amount of research, Asahi Kasei Corporation of Japan successfully hydrogenated benzene to obtain cyclohexene, and cyclohexene was ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/04C07C29/80C07C35/08
CPCC07C29/04C07C29/80C07C35/08
Inventor 田晖孙进超陈可明刘海涛邓帅封燕胡明圆
Owner YANTAI UNIV
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