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A method for separating isoamyl alcohol and isoamyl acetate

A technology of isoamyl acetate and isoamyl alcohol, applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve problems such as difficulty in separation and insufficient purity, and achieve the effect of reducing difficulty

Active Publication Date: 2020-03-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of method for separating isoamyl alcohol and isoamyl acetate, overcome the separation difficulty existing in current production, the problems such as purity is not enough

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  • A method for separating isoamyl alcohol and isoamyl acetate

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Embodiment 1

[0033] A method for separating isoamyl alcohol and isoamyl acetate by continuous azeotropic distillation, comprising the following steps:

[0034] (1) Adopting the first rectifying tower 1 whose total number of theoretical plates is 33, adding the separation aid benzyl chloride from the 12th theoretical plate on the top of the tower, adding the raw materials to be separated from the 27th theoretical plate, and carrying out the extraction process Distillation, when the vapor-liquid balance is reached, the steam in the tower top is condensed by the first condenser 2, and the liquid obtained by collecting the condensed reflux is used as the production liquid, which is isoamyl alcohol;

[0035] Among them, the mass ratio of isoamyl alcohol and isoamyl acetate in the raw material to be separated is 68:32, the processing capacity of the raw material to be separated is 100Kg / hr, and the feeding condition is normal pressure bubble point feeding; the addition of the separation aid benzy...

Embodiment 2

[0042] A method for separating isoamyl alcohol and isoamyl acetate by continuous azeotropic distillation, comprising the following steps:

[0043] (1) Adopting the first rectifying tower 1 whose total number of theoretical plates is 33, adding the separation aid benzyl chloride from the 12th theoretical plate on the top of the tower, adding the raw materials to be separated from the 27th theoretical plate, and carrying out the extraction process Distillation, when the vapor-liquid balance is reached, the steam in the tower top is condensed by the first condenser 2, and the liquid obtained by collecting the condensed reflux is used as the production liquid, which is isoamyl alcohol;

[0044] Wherein, the mass ratio of isoamyl alcohol and isoamyl acetate in the raw material to be separated is 1:0.1, the processing capacity of the raw material to be separated is 100Kg / hr, and the feeding condition is normal pressure bubble point feeding; the addition of the separating agent benzyl...

Embodiment 3

[0051] A method for separating isoamyl alcohol and isoamyl acetate by continuous azeotropic distillation, comprising the following steps:

[0052] (1) Adopting the first rectifying tower 1 whose total number of theoretical plates is 33, adding the separation aid benzyl chloride from the 12th theoretical plate on the top of the tower, adding the raw materials to be separated from the 27th theoretical plate, and carrying out the extraction process Distillation, when the vapor-liquid balance is reached, the steam in the tower top is condensed by the first condenser 2, and the liquid obtained by collecting the condensed reflux is used as the production liquid, which is isoamyl alcohol;

[0053] Wherein, the mass ratio of isoamyl alcohol and isoamyl acetate in the raw material to be separated is 1:10, the processing capacity of the raw material to be separated is 100Kg / hr, and the feeding condition is normal pressure bubble point feeding; the addition of the separating agent benzyl ...

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Abstract

The invention discloses a method for separating isoamyl alcohol and isoamyl acetate, and belongs to the technical field of chemical engineering separation. A first rectifying tower and a second rectifying tower are used to continuously extract and rectify the isoamyl alcohol and the isoamyl acetate, a third component which is a separating agent aid is added to greatly change the relative volatilities of the isoamyl alcohol and the isoamyl acetate and reduce the separation difficulty of the isoamyl alcohol and the isoamyl acetate in order to realize the separation of the isoamyl alcohol and the isoamyl acetate and obtain highly pure isoamyl acetate and isoamyl alcohol, and the separating agent aid is effectively recovered.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to a method for separating isoamyl alcohol and isoamyl acetate. Background technique [0002] Isoamyl acetate, molecular formula C 7 h 14 o 2 , is an excellent organic solvent, mainly used in processing industries such as solvents, seasoning, tanning, rayon, film and textiles; it can be used in daily chemical flavor formulas such as soaps and synthetic detergents, and is often used as an important ingredient in food flavor formulas , can be used to make banana, apple, strawberry and other fructose flavors; it can also be used for the extraction of spices and penicillin, fabric dyeing, etc. Since its purity is closely related to food safety, it puts higher demands on our production. [0003] Industrial isoamyl acetate is mostly obtained by esterification of acetic acid and isoamyl alcohol. Therefore, isoamyl acetate is often unavoidably mixed with impuriti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/14C07C67/54C07C31/125C07C29/84
CPCC07C29/84C07C67/54C07C69/14C07C31/125
Inventor 姜占坤张凤娇耿玉琦杨成
Owner UNIV OF JINAN
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