Polyglycolic acid polymerization devolatilization system

By using a steam jet vacuum system in conjunction with a multi-stage ejector, a mixing condenser, and a liquid ring pump, the problems of low mass transfer efficiency and inaccurate process control in high-viscosity polyglycolic acid melts are solved, improving product purity and performance, and making it suitable for high-end applications such as medical-grade sutures and biodegradable packaging films.

CN122124702APending Publication Date: 2026-06-02INNER MONGOLIA ZHUOZHENG COAL CHEM CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202610275780.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-09
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing polyglycolic acid polymerization devolatilization systems suffer from low mass transfer efficiency when processing high-viscosity polyglycolic acid melts, making it difficult to effectively remove small molecule residues. Furthermore, the lack of precise process control affects product purity and performance.

Method used

The system employs a steam jet vacuum system combined with a multi-stage ejector to establish a high vacuum environment by progressively compressing gas. A spray device is installed in the mixing condenser for condensation, a liquid ring pump maintains vacuum stability, and a utility system provides power, condensation, and insulation support.

Benefits of technology

It improves mass transfer efficiency and process control precision, reduces residual monomer content in polyglycolic acid products, optimizes polymer purity and mechanical properties, and is suitable for high-end applications such as medical-grade sutures and biodegradable packaging films.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of polyglycolic acid synthesis, in particular to a polyglycolic acid polymerization devolatilization system which comprises a steam injection vacuum system, a mixing condenser, a liquid ring pump and a public engineering system. An inlet of the steam injection vacuum system is connected with the polyglycolic acid polymerization reaction system, and an outlet is connected with an inlet of the mixing condenser for separating volatile matters such as unreacted monomers and low-molecular byproducts; a gas outlet of the mixing condenser is connected with an inlet of the liquid ring pump, condensable components are liquefied through condensation treatment, and non-condensable gas is discharged; the liquid ring pump extracts non-condensable gas to maintain the vacuum degree of the system; the utility system integrates a power steam pipeline, a condensation medium pipeline and a heat preservation medium pipeline, and provides power, condensation and heat preservation support for all the assemblies. The system improves the mass transfer efficiency and the process control precision through the cooperative operation of multi-stage jet compression, spray condensation and heat preservation, effectively removes volatile matters, and enhances the purity, biodegradability and mechanical properties of a polyglycolic acid product.
Need to check novelty before this filing date? Find Prior Art