Production process and production system of glycolide
By using the method of using the Glycolide steam bottom feed and spraying on the top of the spray in the Glycolide production process, rapid condensation and cooling are achieved, the problem of Glycolide self-polymerization is solved, and the product quality and yield are improved.
CN119707912APending Publication Date: 2025-03-28SHANGHAI ZILING CHEM TECH CO LTD
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Patent Information
- Application Number
- CN202311284027.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-28
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
Glycolide tends to self-polymerize during cooling, resulting in a decrease in quality and yield.
Method used
Glycolide steam feed is used to spray the top of the spray liquid, and the steam and liquid are contacted countercurrently, and the crude glycolide is quickly condensed and cooled down to reduce the high-temperature residence time.
Benefits of technology
It effectively reduces the self-polymerization of glycolide, improves product quality and yield, and reduces the pressure drop and risk of blockage in the system.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a production process and a production system of glycolide, and the production process of glycolide comprises the following steps: generating crude glycolide steam through a cracking cyclization reaction of glycollic acid or glycollate oligomer and a catalyst, and enabling the crude glycolide steam to enter a quench tower from the bottom of the quench tower, the crude glycolide steam is in vapor-liquid countercurrent contact with quenching spray liquid which is continuously sprayed downwards in the quenching tower, so that the crude glycolide steam is quickly cooled and condensed, the adopted quenching spray liquid comprises a material flow B1 which is shunted by a crude glycolide material flow A in a pressurizing process, and meanwhile, the invention provides a corresponding glycolide production system. According to the production process and the production system of the glycolide, disclosed by the invention, the retention time of the glycolide in a high-temperature region is finally short, the amount of the glycolide entrained in a vapor phase is less, self-polymerization of the glycolide can be greatly reduced, the pressure drop is low, and the possibility of blockage is low.
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