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US 5,437,797 AGranted
Mercury removal from waste water
AssigneeAmerican Home Products Corporation
InventorEdward G. Helmig
Life of this patent
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Abstract
Method for removal of organic and inorganic mercury contaminants from a biological vaccine production facility.
Claims7
A process for removal of mercury from an aqueous effluent stream containing organic and inorganic mercury contaminants produced in a biological vaccine production facility, which consists essentially in:
- (a) removing solids from said effluent stream in excess of about five millimicrons in size by filtration through one or more molecular sieve filters providing pore sizes from about 100 millimicrons to about 1 millimicron;
- (b) adjusting the pH of the effluent stream to about 6 or below if it is above pH6,
- (c) decolorizing the effluent stream with activated carbon;
- (d) removing both organic and inorganic mercury compounds with a macroporous, cross-linked polystyrene chelating resin having polyisothiouronium functional groups.
1 more element
Dependencies are inferred from the claim text.