Preparation of glycols from ethylene oxide

Details Preparation of glycols from ethylene oxide Preparation of glycols from ethylene oxide

C - Chemistry, Metallurgy

07

C

260/634.3, 260/6

C07C 31/20 (2006.01) C07C 29/10 (2006.01) C07C 43/13 (2006.01) C07D 301/10 (2006.01)

Patent

CA 1232918

TITLE Preparation of Glycols from Ethylene Oxide INVENTORS Vijay S. Bhise Harold Gilman ABSTRACT A process for preparation of glycols in which the vapor remaining after the partial condensation of a conventional ethylene oxide stripper overhead vapor stream is contacted with an aqueous solution of ethylene carbonate to recover ethylene oxide. No water need be removed from the enriched ethylene carbonate stream. Carbon dioxide is added and ethylene carbonate is formed by reaction at about 50 to 200°C and 5 to 150 kg/cm2 gauge in the presence of a suitable catalyst, preferably about 0.5-20 wt % of an organic phosphonium halide. After stripping off unreacted components, the ethylene carbonate is hydrolyzed to glycols in the presence of the same carbonation catalyst and at temperatures in the range of about 100 to 200°C and pressures of about 5 to 150 kg/cm2 gauge. Optionally, ethylene oxide and ethylene carbonate may be co-produced. 1252

460141

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