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Separation method of acetophenone from 1-phenethyl alcohol

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

Active Publication Date: 2017-06-20
JIANGXI KEYUAN BIOPHARM
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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 of acetophenone from 1-phenethyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for separating acetophenone and 1-phenylethanol, such as figure 1 As shown, including the following steps:

[0027] (1) The mixture of acetophenone with a mass percentage of 28% acetophenone and 1-phenylethanol is fed into the first distillation tower 2 for initial distillation, and the top of the tower obtains a mass percentage of acetophenone of 52 % Of the mixture of acetophenone and 1-phenylethyl alcohol, 1-phenylethyl alcohol product is obtained at the bottom of the tower (sample analysis, purity of 99.4%), the operating pressure of the first distillation tower 2 is 0.1MPa, the temperature of the top and bottom of the tower Are the boiling point of the system;

[0028] (2) The tower top mixture obtained in step (1) is pumped into the bottom of the extraction tower 1, and the extractant glycerol added from the top of the extraction tower 1 is in countercurrent contact in the extraction tower 1 for extraction. The top of the extraction tower 1 obtains the produc...

Embodiment 2

[0033] A method for separating acetophenone and 1-phenylethanol, such as figure 1 As shown, including the following steps:

[0034] (1) The mixture of acetophenone and 1-phenylethanol whose mass percentage concentration of acetophenone is 3% is fed into the first distillation tower 2 for preliminary distillation, and the top of the tower obtains a mass percentage concentration of acetophenone of 41 % Of the mixture of acetophenone and 1-phenylethyl alcohol, 1-phenylethyl alcohol product is obtained at the bottom of the tower (sampling analysis, purity of 99.2%), the operating pressure of the first distillation tower 2 is 0.02MPa, the temperature of the top and bottom of the tower Are the boiling point of the system;

[0035] (2) The tower top mixture obtained in step (1) is pumped into the bottom of the extraction tower 1, and the extractant glycerol added from the top of the extraction tower 1 is in countercurrent contact in the extraction tower 1 for extraction. The top of the e...

Embodiment 3

[0040] A method for separating acetophenone and 1-phenylethanol, such as figure 1 As shown, including the following steps:

[0041] (1) The mixture of acetophenone and 1-phenylethanol whose mass percentage concentration of acetophenone is 95% is fed into the first distillation tower 2 for initial distillation, and the top of the tower obtains a mass percentage concentration of acetophenone of 96.2 % Of the mixture of acetophenone and 1-phenylethyl alcohol, 1-phenylethyl alcohol product is obtained at the bottom of the tower (sample analysis, purity is 99.7%), the operating pressure of the first distillation tower 2 is 0.001MPa, the temperature of the top and bottom of the tower Are the boiling point of the system;

[0042] (2) The tower top mixture obtained in step (1) is pumped into the bottom of the extraction tower 1, and the extractant glycerol added from the top of the extraction tower 1 is in countercurrent contact in the extraction tower 1 for extraction. The top of the ext...

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Abstract

The invention discloses a separation method of acetophenone from 1-phenethyl alcohol. The solubility and the relative volatility of acetophenone and 1-phenethyl alcohol in glycerine are different, so that separation of acetophenone from 1-phenethyl alcohol is realized via coupling operation of extraction and rectification. The separation method is simple; separation effect is excellent; energy is saved; the separation method is friendly to the environment, and is suitable for industrial-scale continuous operation.

Description

[0001] This application is a divisional application with the application number of 201510713615.3 invention patent application. Technical field [0002] The invention belongs to the field of fine chemicals, and specifically relates to a method for separating acetophenone and 1-phenylethanol. Background technique [0003] Acetophenone is an important organic chemical raw material with the odor of hawthorn. It can be used as a solvent, fragrance, plasticizer and chemical intermediate and is widely used in soap, cigarettes, fragrance, medicine, resin, etc. Its melting point is 19.6°C. It has a boiling point of 202°C and a density of 1.027. 1-Phenylethanol is also an important organic chemical raw material. It has a soft, pleasant and long-lasting rose aroma. It is an important and widely used edible spice among the aromatic compounds used in perfumery. Among various edible flavors and tobacco flavors, the melting point is 20℃, the boiling point is 203.6℃, ​​and the density is 1.013. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/78C07C45/83C07C49/213C07C29/74C07C29/84C07C33/22
CPCC07C29/74C07C29/76C07C29/84C07C45/78C07C45/83C07C49/78C07C33/22C07C49/213
Inventor 王勤波熊振华陈楚雄
Owner JIANGXI KEYUAN BIOPHARM
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