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PROCESS FOR CONVERTING THE ETHYLENE CARBONATE CONTAINED IN THE EFFLUENT OF AN ETHYLENE CARBONATE HYDROLYSIS REACTOR TO ETHYLENE GLYCOL
PROCESS FOR CONVERTING THE ETHYLENE CARBONATE CONTAINED IN THE EFFLUENT OF AN ETHYLENE CARBONATE HYDROLYSIS REACTOR TO ETHYLENE GLYCOL
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机译:将乙烯碳酸酯水解反应器中的乙烯碳酸酯转化为乙二醇的方法
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摘要
Ethylene glycol is purified, particularly for fiber-grade applications, by removal of the residual ethylene carbonate from which the glycol was derived. The effluent from a reactor in which ethylene carbonate is hydrolyzed to ethylene glycol is distilled to produce a lower-boiling fraction comprising substantially ethylene glycol and water and a higher-boiling fraction comprising substantially ethylene glycol, higher glycols, and concentrated in hydrolysis catalyst. The higher-boiling fraction is recirculated to reflux against the lower-boiling product, thereby essentially completing the hydrolysis of unreacted ethylene carbonate thereby reducing the ethylene carbonate content of the ethylene glycol to very low levels suitable for fiber-grade applications.
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