Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1983-08-02
1985-04-02
Evans, J. E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
549450, 549538, C07C 2900, C07C 3120
Patent
active
045089272
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.degree. to 200.degree. C. and 5 to 150 kg/cm.sup.2 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.degree. to 200.degree. C. and pressures of about 5 to 150 kg/cm.sup.2 gauge. Optionally, ethylene oxide and ethylene carbonate may be co-produced.
REFERENCES:
patent: 3214892 (1965-11-01), Holbrook et al.
patent: 3629343 (1971-12-01), Zaharovich et al.
patent: 3964980 (1976-06-01), Ozero
patent: 4117250 (1978-09-01), Foster et al.
patent: 4160116 (1979-07-01), Mieno et al.
patent: 4221727 (1980-09-01), Tsang et al.
patent: 4233221 (1980-11-01), Raines et al.
patent: 4237324 (1980-12-01), Raines et al.
patent: 4314945 (1982-02-01), McMullen et al.
patent: 4400559 (1983-08-01), Bhise
Bhise Vijay S.
Gilman Harold
Evans J. E.
Long William C.
Stewart Riggs T.
The Halcon SD Group, Inc.
Wells Harold N.
LandOfFree
Preparation of glycols from ethylene oxide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of glycols from ethylene oxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of glycols from ethylene oxide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1092202