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US 7,413,664 B2Granted
Selenium removal process
AssigneeConocoPhillips Company
InventorsCharles J. Lord, III, Larry E. Reed
Life of this patent
Estimating the term…
Abstract
A process for removing selenium from an aqueous stream using a supported sulfur material, to convert selenocyanate to selenite, followed by removal of the selenite from the aqueous stream.
Claims13
A process comprising:
- a) contacting a feed stream comprising water and selenocyanate with a composition consisting essentially of sulfur and a porous support, wherein said porous support is selected from the group consisting of alumina, carbon and combinations thereof, in the presence of at least about 6 ppm oxygen, for conversion of at least a portion of said selenocyanate to selenite, thereby forming an intermediate stream;
- and
- b) contacting said intermediate stream with a selenite removal system, thereby forming a treated stream comprising less selenium than said feed stream.
Dependencies are inferred from the claim text.