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Coproduction method of acetate and ethylene glycol

A technology of ethylene glycol and acetate, applied in the field of co-production of acetate and ethylene glycol, can solve the problems of high separation energy consumption and complicated process, achieve good technical effects, reduce emissions, and reduce equipment investment and the effect of process energy consumption

Active Publication Date: 2019-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the traditional acetate production process, water, acetate and alcohol form a variety of azeotropes due to esterification reaction, resulting in high energy consumption for separation and complicated process. New method for the co-production of acetate and ethylene glycol

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  • Coproduction method of acetate and ethylene glycol
  • Coproduction method of acetate and ethylene glycol
  • Coproduction method of acetate and ethylene glycol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Under the condition that catalyst exists, the mixture of alcohol and oxirane reacts with acetic acid, coproduces acetate and ethylene glycol, comprises the following steps:

[0037] a) Acetic acid is added to the upper part of a single reactive distillation column, and a mixture of alcohol and ethylene oxide is added to the lower part; the rectification section is from the feed position of acetic acid to the top of the tower, between the feed position of acetic acid and the feed position of the mixture of alcohol and ethylene oxide The middle is the reaction section, and the feed position of the mixture of alcohol and ethylene oxide to the tower kettle is the stripping section;

[0038] b) The rectification section is filled with fillers, the reaction section is filled with catalysts and fillers, and the stripping section is filled with fillers;

[0039] c) acetic acid and alcohol undergo esterification to generate acetate, while ethylene oxide and the water generated b...

Embodiment 2

[0051] Under the condition that catalyst exists, the mixture of alcohol and oxirane reacts with acetic acid, coproduces acetate and ethylene glycol, comprises the following steps:

[0052] a) Acetic acid is added to the upper part of a single reactive distillation column, and a mixture of alcohol and ethylene oxide is added to the lower part; the rectification section is from the feed position of acetic acid to the top of the tower, between the feed position of acetic acid and the feed position of the mixture of alcohol and ethylene oxide The middle is the reaction section, and the feed position of the mixture of alcohol and ethylene oxide to the tower kettle is the stripping section;

[0053] b) The rectification section is filled with fillers, the reaction section is filled with catalysts and fillers, and the stripping section is filled with fillers;

[0054] c) acetic acid and alcohol undergo esterification to generate acetate, while ethylene oxide and the water generated b...

Embodiment 3

[0065] Under the condition that catalyst exists, the mixture of alcohol and oxirane reacts with acetic acid, coproduces acetate and ethylene glycol, comprises the following steps:

[0066] a) Acetic acid is added to the upper part of a single reactive distillation column, and a mixture of alcohol and ethylene oxide is added to the lower part; the rectification section is from the feed position of acetic acid to the top of the tower, between the feed position of acetic acid and the feed position of the mixture of alcohol and ethylene oxide The middle is the reaction section, and the feed position of the mixture of alcohol and ethylene oxide to the tower kettle is the stripping section;

[0067] b) The rectification section is filled with fillers, the reaction section is filled with catalysts and fillers, and the stripping section is filled with fillers;

[0068] c) acetic acid and alcohol undergo esterification to generate acetate, while ethylene oxide and the water generated b...

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Abstract

The invention relates to a co-production method of acetate and ethylene glycol. The technical problems that due to the fact that existing acetate production process produced water forms multiple types of azeotrope, the workflow is complex, and energy consumption of separation is high are mainly solved. According to the technical scheme, on the condition that a catalyst exists, acetic acid is added into the upper portion inside a single reactive distillation tower, at least one of C1-C5 alcohols and ethylene oxide are added into the lower portion inside the single reactive distillation tower, acetic acid and alcohols are subjected to an esterification reaction, and acetate and water are generated; ethylene oxide reacts with water generated through the esterification reaction to generate ethylene glycol, and an acetate mixture is obtained on the top of the reactive distillation tower; the acetate mixture is further subjected to distillation separation, ethylene glycol, diethylene glycol, triethylene glycol and polyethylene glycol are obtained in a reactive distillation tower kettle, and an ethylene glycol product, a diethylene glycol product, a triethylene glycol product, a polyethylene glycol product and other heavy components are obtained through distillation respectively. The problems are better solved, and the co-production method of acetate and ethylene glycol can be used for co-production industrial production of acetate and ethylene glycol.

Description

technical field [0001] The invention relates to a co-production method of acetate and ethylene glycol. Background technique [0002] Acetate is an important organic solvent widely used in coatings, adhesives, medicine and many other fields. With the strengthening of environmental protection requirements and the improvement of environmental awareness, acetate will gradually replace methyl ethyl ketone, toluene, benzene and other solvents that are harmful to the environment and humans in products such as coatings and adhesives. Most esterification production processes have the problem of separation of acid, alcohol, ester and water. The system has alcohol-water, alcohol-ester, ester-water binary azeotrope, alcohol-water-ester ternary azeotrope , leading to the traditional production process of acetates, most of which are based on the reaction of acid and alcohol, and then undergo a series of separation processes, which are long in process and high in energy consumption. For ...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/14C07C29/10C07C31/20
CPCC07C29/106C07C67/08C07C69/14C07C31/202Y02P20/10
Inventor 郭毅胡松杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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