Process for the purification of ethylene oxide

Details Process for the purification of ethylene oxide Process for the purification of ethylene oxide

1976-07-08

1977-07-05

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat in subsequent step in process

203 36, 203 38, 203 74, 203 75, 202198, 62 31, 55 50, 55 56, 55 68, 260348R, 2603485R, 203 29, B01D 314, C07D30304

Patent

active

040336174

ABSTRACT:
Crude ethylene oxide present in the dilute aqueous solution resulting from the extraction with an aqueous solvent of ethylene oxide from the gaseous stream obtained by catalytic oxidation of ethylene is purified by desorption, liquefaction, distillation in a fractionating column and final desorption treatment to remove absorbed non-condensable gases. The fractionating column is heated by condensation of the water vapor evolved during desorption and a liquid stream of ethylene oxide rich in acetaldehyde is discharged from the bottom, treated to convert a fraction of said acetaldehyde into high-boiling products, distilled to remove the latter as bottoms and returned to the fractionating column.

REFERENCES:
patent: 3165539 (1965-01-01), Lutz
patent: 3174262 (1965-03-01), Lutz
patent: 3418338 (1968-12-01), Gilman et al.
patent: 3745092 (1973-07-01), Van der Water

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