Process for the purification of industrial waste water from a propylene oxide production process
AssigneeShell Oil Company
InventorsJohan Hendrik De Bie, Robert Frank Dee, Raymond Lawrence June, Marinus Van Zwienen
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Abstract
A process for treating waste water from an industrial process for producing propylene oxide, which process involves the steps of: (a) subjecting the waste water to a multi-effect evaporation treatment resulting in a vaporous top fraction and a liquid bottom fraction containing the non-volatile contaminants; and (b) condensing at least part of the vaporous top fraction into a liquid stream which is subject to a stripping treatment resulting in an overhead stream containing volatile waste organic material and purified water as the liquid bottom stream.
Claims9
A process for treating waste water from an industrial process for producing propylene oxide, comprising:
- (a) subjecting the waste water to a multi-effect evaporation treatment resulting in a vaporous top fraction and a liquid bottom fraction containing the non-volatile contaminants;
- and,
- (b) condensing at least part of the vaporous top fraction into a liquid stream which is subjected to a stripping treatment resulting in an overhead stream containing volatile waste organic material and purified water as the liquid bottom stream.
Dependencies are inferred from the claim text.