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Method for purification of ss-phenylethyl alcohol

A kind of purification method, the technology of phenethyl alcohol, be applied in the purification field of following β-phenethyl alcohol, can solve the problems such as unfavorable economy, no oxidation reaction etc.

Inactive Publication Date: 2013-03-13
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method has disadvantages and is problematic as an industrial method
That is, in the single distillation method, when the operating pressure of the purification tower is a negative pressure, it has no effect on suppressing the oxidation reaction of β-phenylethanol caused by a small amount of air leaking from the flange portion of the device, etc.
In addition, since a new distillation facility is required upstream of the purification tower, it is also economically disadvantageous

Method used

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  • Method for purification of ss-phenylethyl alcohol

Examples

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Embodiment 1

[0041] Contain the thick beta-phenylethanol of 67.1% (weight) beta-phenylethanol with the speed supply of 425.4kg / hour by supply pipe (1), take out distillation and separation heavy matter with the speed of 310.9kg / hour by drain pipe (4) again For the separated liquid, the above-mentioned supply pipe (1) is arranged on the twelfth stage counted from the top of the heavy separation column (2). The number of sections of the heavy separation column (2) is 33 sections, the top pressure is 29.3kPa, and the reflux ratio is 3.9. The thick β-phenylethanol that will pass through the heavy separation step is supplied to alkali cleaning tank (5), and it is 25% to supply sodium hydroxide concentration in the alkali cleaning tank (5) with the speed of 62.9kg / hour by supply pipe (6) simultaneously (weight) of alkaline water. In order to improve the cleaning efficiency, the alkali cleaning tank (5) uses a reactor with built-in rotating paddles and operates at a temperature of 80° C. and ...

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Abstract

Disclosed is a method for the purification of ß-phenylethyl alcohol, which comprises supplying ß-phenylethyl alcohol to be purified to a distillation column to produce ß-phenylethyl alcohol in a purified form as a side-cut fraction. In the method, it is preferred to recycle a fraction collected from the top section of the distillation column into the light boiling substance separation step, from the view point of preventing the loss of ß-phenylethyl alcohol in the components present in the top section of the distillation column.

Description

technical field [0001] The present invention relates to the purification method of β-phenylethanol. More specifically, the present invention relates to a method for purifying β-phenylethanol, which is characterized in that it can be efficiently selected from β-phenylethanol by simple operations without requiring complex devices and operations. Separation and removal of odorous components generated in the purification tower to obtain high-purity β-phenylethanol with elegant aroma for fragrances. Background technique [0002] β-Phenethyl alcohol is a valuable substance widely used in detergents, cosmetics, etc. as a rose fragrance, and it is required to be a product with high purity and elegant aroma when used. Usually, the product value of fragrance ingredients will be significantly reduced even if there is a trace amount of impurities that affect their original aroma. Therefore, special attention should be paid to its purification method. In particular, in the purificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/80C07C29/84C07C29/86C07C33/22
CPCC07C29/84
Inventor 宇高太郎
Owner SUMITOMO CHEM CO LTD
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