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Separation method for acetophenone and 1-phenylethanol

A separation method and technology of acetophenone, applied in chemical instruments and methods, separation/purification of hydroxyl compounds, separation/purification of carbonyl compounds, etc., can solve the problems of unsuitable industrial scale production, long operation cycle and low product purity and other issues, to achieve the effect of high product recovery rate, less three wastes, and stable chemical properties

Active Publication Date: 2016-03-23
山东友道化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN102627544A proposes a method for separating acetophenone and 1-phenylethanol by utilizing the different inclusion abilities of cyclodextrin. Although this method has mild separation conditions, good separation effect, and reusable separation medium, etc. Advantages, but the operation period is long (usually more than 12 hours), the purity of the separated product is low in most cases, and the operation is complicated, so it is not suitable for industrial scale production

Method used

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  • Separation method for acetophenone and 1-phenylethanol
  • Separation method for acetophenone and 1-phenylethanol

Examples

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Embodiment 1

[0039] A kind of separation method of acetophenone and 1-phenylethanol, such as figure 1 shown, including the following steps:

[0040] (1) the mass percent concentration of acetophenone is that the acetophenone of 87.2% and the 1-phenylethanol mixture are squeezed into the bottom of extraction tower 1, and in extraction tower 1 with the extraction agent glycerin that adds from the top of extraction tower 1 Countercurrent contacting is carried out extraction, and the product acetophenone (purity of sampling analysis is 98.2%, recovery rate of acetophenone 99.99%) is obtained at the top of extraction tower 1, and the mixture of acetophenone, 1-phenylethanol and glycerol is obtained at the bottom of the tower, and extraction The operating temperature of the tower is 90.0°C, the pressure is 1MPa, and the molar flow ratio of the mixture of glycerol, acetophenone and 1-phenylethanol is 0.915:1;

[0041](2) the mixture at the bottom of the tower that step (1) obtains is put into re...

Embodiment 2

[0044] A kind of separation method of acetophenone and 1-phenylethanol, such as figure 1 shown, including the following steps:

[0045] (1) the mass percent concentration of acetophenone is that the acetophenone of 41.6% and 1-phenylethanol mixture are squeezed into the bottom of extraction tower 1, and in extraction tower 1 with the extraction agent glycerol that adds from the top of extraction tower 1 Countercurrent contact is carried out extraction, and the product acetophenone (purity of sampling analysis is 98.1%, recovery rate of acetophenone 99.92%) is obtained at the top of extraction tower 1, and the mixture of acetophenone, 1-phenylethyl alcohol and glycerol is obtained at the bottom of the tower, and extraction The operating temperature of the tower is 70.0°C, the pressure is 0.1MPa, and the molar flow ratio of the mixture of glycerol, acetophenone and 1-phenylethanol is 6:1;

[0046] (2) the tower bottom mixture that step (1) is obtained enters rectification in th...

Embodiment 3

[0049] A kind of separation method of acetophenone and 1-phenylethanol, such as figure 1 shown, including the following steps:

[0050] (1) the mass percent concentration of acetophenone is that the acetophenone of 56.4% and the 1-phenylethanol mixture are squeezed into the bottom of extraction tower 1, and in extraction tower 1 with the extraction agent glycerin that adds from the top of extraction tower 1 Countercurrent contact is carried out extraction, and the product acetophenone (purity of sampling analysis is 98.1%, recovery rate of acetophenone 99.96%) is obtained at the top of extraction tower 1, and the mixture of acetophenone, 1-phenylethyl alcohol and glycerol is obtained at the bottom of the tower, and extraction The operating temperature of the tower is 20.0°C, the pressure is 0.05MPa, and the molar flow ratio of glycerol, acetophenone and 1-phenylethanol mixture is 10:1;

[0051] (2) the tower bottom mixture that step (1) obtains is put into rectifying in the f...

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Abstract

The present invention discloses a separation method for acetophenone and 1-phenylethanol. According to the difference of the solubility and the relative volatility of acetophenone and 1-phenylethanol in glycerol, the separation of the acetophenone and 1-phenylethanol is realized by utilizing the coupling operation of extraction and distillation. The separation method has the advantages of simple process, good separation effect, energy conservation, environment protection and the like, and is suitable for industrial large-scale continuous operation.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a method for separating acetophenone and 1-phenylethanol. Background technique [0002] Acetophenone is an important organic chemical raw material. It has the smell of hawthorn. It can be used as a solvent, spice, plasticizer and chemical intermediate and is widely used in soap, cigarettes, spices, medicine, resin, etc., with a melting point of 19.6°C. The boiling point is 202°C and the density is 1.027. 1-Phenylethyl alcohol is also an important organic chemical raw material. It has a soft, pleasant and long-lasting rose aroma. Among various food flavors and tobacco flavors, the melting point is 20°C, the boiling point is 203.6°C, and the density is 1.013. [0003] The industrial production methods of acetophenone include cumene oxidation by-product method and ethylbenzene oxidation method. The cumene oxidation by-product method contains a large amount of acetophenone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/78C07C49/78C07C29/76C07C33/22
CPCC07C29/74C07C29/76C07C29/84C07C45/78C07C45/83C07C49/78C07C33/22C07C49/213
Inventor 王勤波熊振华陈楚雄
Owner 山东友道化学有限公司
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