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Purifying process of glycolide

A purification method and glycolide technology, applied in the direction of organic chemistry, etc., can solve the problems of low yield and difficult industrialization, and achieve the effect of high yield and high purity

Inactive Publication Date: 2010-11-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using acetone and ethyl acetate as solvents, adopting this method to purify glycolide, the yield is too low, and it is difficult to industrialize

Method used

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Embodiment 2

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Abstract

The invention relates to a glycolide purification method. It obtains high purity glycolide by remove such as glycolide oligomer, glycolic acid, water and other impurities from the crude glycolide.

Description

Purification method of glycolide technical field The invention relates to a method for purifying glycolide, which is a cyclic ester formed from two molecules of glycolic acid. Background technique Glycolide is an important compound that can be used to prepare polyglycolic acid and its copolymers. In recent years, due to the biodegradability of polyglycolic acid and its copolymers, polyglycolic acid and polylactic acid-glycolic acid copolymers are more It is one of the few biomaterials that can be used clinically and has attracted much attention. High molecular weight polyglycolic acid and its copolymers must be obtained by ring-opening polymerization of glycolide. Some methods of synthesizing glycolide will be described below. Usually, glycolide is synthesized by high-temperature distillation using low-molecular-weight polyglycolic acid (hereinafter referred to as oligomer) as an intermediate. The method includes: , to cyclize the above-mentioned intermediate to gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D319/12
Inventor 申雄军阮建明
Owner CENT SOUTH UNIV