Distillation: processes – separatory – Plural distillations performed on same material – One a distillation under positive pressure or vacuum
Patent
1988-12-16
1990-10-30
Bascomb, Wilbur
Distillation: processes, separatory
Plural distillations performed on same material
One a distillation under positive pressure or vacuum
203 77, 203 87, 203 92, 203 93, 549541, B01D 338, C07D30132
Patent
active
049666576
ABSTRACT:
An improved process for separating ethylene-oxide from formaldehyde and acetaldehyde in contaminated ethylene oxide, the process involves introducing the contaminated ethylene oxide into a reflux column and distilling the contaminated ethylene oxide under conditions such that the fluid stream leaving the bottom of the reflux column contains the water present in the contaminated ethylene oxide and the ethylene oxide in amounts corresponding, on a weight basis, to 0.15 to 3 times the weight of the water, and the ethylene oxide resulting from the separation of the formaldehyde and acetaldehyde leaves the column at its top.
REFERENCES:
patent: 2615901 (1952-10-01), McClellan
patent: 3165539 (1965-01-01), Lutz
patent: 3265593 (1966-08-01), Leis et al.
patent: 3418338 (1968-12-01), Gilman et al.
patent: 3745092 (1973-07-01), Vanderwater
patent: 4134797 (1979-01-01), Ozero
patent: 4778567 (1988-10-01), Kakimoto et al.
French Search Report FR 8718246 dated Aug. 23, 1988.
Delannoy Francis
Letray Gerard
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