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Method for separating acetophenone and alpha-phenethyl alcohol from mixture of acetophenone and alpha-phenethyl alcohol

A technology of acetophenone and phenethyl alcohol, applied in the separation field of chemical industry and perfume, can solve the problems of high cost, difficult to realize industrialization, low separation purity and the like, and achieve the effects of preventing oxidation, low cost and short separation time.

Active Publication Date: 2015-03-25
HANDWAY TECH FOSHAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the aforementioned patents and literature reports use techniques such as vacuum distillation, reactive distillation, extractive distillation and inclusion separation to separate acetophenone and α-benzene in the mixture of acetophenone and α-phenylethanol. Ethanol has the problems of low separation purity, high cost and difficulty in industrialization

Method used

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  • Method for separating acetophenone and alpha-phenethyl alcohol from mixture of acetophenone and alpha-phenethyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for separating acetophenone, α-phenylethyl alcohol binary components from acetophenone and α-phenylethyl alcohol mixture of the present invention comprises the steps:

[0020] Put 400.0 g of a mixture of 50% acetophenone and 50% α-phenylethanol into the material tank 1, control the temperature of the rectification column at 80 °C, the evaporation temperature at 105 °C, and total reflux for 30 min, with a reflux ratio of 3 and The vacuum degree was 1200 Pa, and the components of this section were collected to obtain 152.0 g of acetophenone with a purity of 85.2% and 170.7 g of α-phenylethanol with a purity of 75.6%. Take 152.0 g of a mixture with acetophenone content of 85.2% and α-phenylethanol content of 14.8%, control the rectification column temperature at 72 °C, evaporation temperature at 91 °C, total reflux for 32 min, reflux ratio of 2 and vacuum degree of 1400 Pa, and collect 121.1 g of acetophenone with a purity of 99.6% was obtained for this segment ...

Embodiment 2

[0022] The method for separating acetophenone, α-phenylethyl alcohol from acetophenone and α-phenylethyl alcohol mixture of the present invention comprises the steps:

[0023] Put 400.0 g of the content mixture of acetophenone and α-phenylethanol in equal mass into material tank 1, control the rectification column temperature at 85 °C, evaporation temperature at 112 °C, total reflux for 40 min, reflux ratio of 3 and vacuum degree of 1200 Pa, The components of this section were collected to obtain 156.4 g of acetophenone with a purity of 88.4% and 174.0 g of α-phenylethanol with a purity of 77.1%. Take 156.4 g of a mixture with 88.4% acetophenone content and 11.6% α-phenylethanol content, control the rectification column temperature at 75 °C, evaporation temperature at 95 °C, total reflux for 35 min, reflux ratio of 2.4 and vacuum degree of 1500 Pa, and collect 126.3g of acetophenone with a purity of 99.4% was obtained for this segment of components; 174.0 g of a mixture with a...

Embodiment 3

[0025] The method for separating acetophenone, α-phenylethyl alcohol from acetophenone and α-phenylethyl alcohol mixture of the present invention comprises the steps:

[0026] Put 400.0 g of a mixture of equal mass of acetophenone and α-phenylethanol into material tank 1, control the rectification column temperature at 88°C, evaporation temperature at 110°C, total reflux for 35 min, reflux ratio of 4 and vacuum degree of 1400 Pa, The components of this section were collected to obtain 150.2 g of light components with a purity of 85.0%-acetophenone and 169.0 g of heavy components with a purity of 75.2%. Take 150.2 g of a mixture with 85.0% acetophenone content and 15.0% α-phenylethanol content, control the rectification column temperature at 80°C, evaporation temperature at 100°C, total reflux for 40 min, reflux ratio 3 and vacuum degree 1400 Pa, collect 128.2 g of acetophenone with a purity of 99.5% is obtained for this segment of components; 169.0 g of a mixture with a conten...

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Abstract

The invention discloses a method for separating acetophenone and alpha-phenethyl alcohol from a mixture of the acetophenone and the alpha-phenethyl alcohol. The method comprises the following steps: (1) adding acetophenone and alpha-phenethyl alcohol to a material tank, controlling the temperature, the evaporation temperature, the reflux ratio and the vacuum degree of a molecular distillation and rectification coupling system rectification column, and respectively separating to obtain two components of a light component and a heavy component; (2) adding the light component to the material tank, controlling the temperature, the evaporation temperature, the reflux ratio and the vacuum degree of the molecular distillation and rectification coupling system rectification column, so as to obtain high-purity acetophenone; and (3) adding the heavy component to the material tank, controlling the temperature, the evaporation temperature, the reflux ratio and the vacuum degree of the molecular distillation and rectification coupling system rectification column, so as to obtain high-purity alpha-phenethyl alcohol. According to the separation method, the defects of conventional reduced pressure rectification and molecular distillation are compensated; the method is short in separation time and simple in flow; low-energy consumption and high-efficiency separation of two mixtures can be achieved; and the method is economic, environment-friendly, and easy to achieve industrialization.

Description

technical field [0001] The invention relates to the field of separation of chemical industry and spices, in particular to a method for separating acetophenone and alpha-phenylethanol from a mixture of acetophenone and alpha-phenylethanol. Background technique [0002] Acetophenone is an important organic chemical raw material, widely used in soap, perfume and pharmaceutical industries. α-Phenylethyl alcohol, also known as 1-phenylethyl alcohol, is also an important chemical raw material, and is also widely used in the fragrance and pharmaceutical industries. In industry, ethylbenzene is generally used as raw material to prepare acetophenone through oxidation method, which mainly contains acetophenone and α-phenylethanol; secondly, quite a lot of petrochemical raw materials, intermediate products and wastes contain acetophenone and α-benzene Ethanol, the content of both is more than 90%. Among them, the boiling points of acetophenone and α-phenylethanol are very close, and ...

Claims

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Application Information

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IPC IPC(8): C07C49/78C07C45/82C07C33/22C07C29/80
CPCC07C29/80C07C45/82C07C49/78C07C33/22
Inventor 纪红兵禤耀明杨祖金
Owner HANDWAY TECH FOSHAN
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