Process for preparing ethylene glycol

Details Process for preparing ethylene glycol Process for preparing ethylene glycol

1982-06-14

1983-08-23

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

549230, 549513, 203 49, 260463, C07C 3120

Patent

active

044005598

ABSTRACT:
Ethylene glycol is prepared by a process in which ethylene oxide is extracted from an aqueous solution with near-critical or super-critical carbon dioxide. Thereafter an ethylene oxide--carbon dioxide--water mixture is contacted with a catalyst to form ethylene carbonate, which is then hydrolyzed to ethylene glycol in the presence of the same catalyst. The ethylene glycol is separated as product and the carbon dioxide and the catalyst are recycled.

REFERENCES:
patent: 4117250 (1978-09-01), Foster et al.
patent: 4237324 (1980-12-01), Rainer et al.
patent: 4283580 (1981-08-01), Odanaka et al.
Peppel, "Industrial and Engineering Chemistry", vol. 50, No. 5 (May 1958), pp. 767-770.
U.S. Ser. No. 284,153, filed 7/17/81, Bhise, et al.
U.S. Ser. No. 321,966, filed 11/16/81, Bhise, et al.
U.S. Ser. No. 326,447, filed 12/2/81, Harvey

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