Ethylene oxide/glycols recovery process
A process is described for recovery of a low concentration of ethylene oxide as glycols from an aqueous solution comprising salts and ethylene oxide, which comprises the steps of: passing the aqueous solution comprising salts and ethylene oxide through a hydrolyzing zone at elevated temperature and elevated pressure for a sufficient length of time to insure the conversion of at least the greater portion of the ethylene oxide to glycols to obtain a dilute aqueous glycol solution; passing the dilute aqueous glycol solution through at least one flasher, wherein water is evaporated in the form of steam thereby producing at the bottom of the (last) flasher a solid-liquid two-phase slurry stream comprising salt-containing solids and liquid phase comprising glycol, salt, and water; sending the slurry-containing stream coming out of the (last) flasher to a centrifuge and centrifuging such stream to produce a solid phase and liquid phase; and passing the centrifuged liquid phase to a glycol flasher wherein glycols are separated.
- Assignee:
- Shell Oil Co., Houston, TX
- Patent Number(s):
- US 4822926
- OSTI ID:
- 5965505
- Resource Relation:
- Patent File Date: Filed date 29 Feb 1988
- Country of Publication:
- United States
- Language:
- English
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