Process for the preparation of ethylene-vinyl alcohol copolymer
DE602022017487T2Active Publication Date: 2025-07-09LG CHEM LTD
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Patent Information
- Application Number
- DE602022017487
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2022-09-26
- Filing Date
- 2022-09-27
- Publication Date
- 2025-07-09
- Estimated Expiration
- 2042-09-27
AI Technical Summary
Technical Problem
Conventional methods for preparing ethylene-vinyl alcohol copolymers face inefficiencies in removing impurities and catalyst residues, leading to increased wastewater generation and reduced production efficiency.
Method used
A method involving saponification of ethylene-vinyl acetate copolymer with an alkali catalyst and a C1-4 alcohol solvent, followed by concentrating the reaction mixture, cooling to form a cake, pulverizing it into crumb, and washing with water to achieve high-purity ethylene-vinyl alcohol copolymer.
Benefits of technology
This method enhances production efficiency and minimizes wastewater generation by achieving high-purity ethylene-vinyl alcohol copolymer through a simpler and more effective washing process.
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