Abstract A method of resolving oil-in-water emulsions resulting from the organic solvent extraction of uranium from aqueous acidic leach liquors which comprises treating said emulsions in accordance with the following steps: (a) adding to said emulsions a water-in-oil emulsion which contains from 2-50% by weight of a water-soluble acrylamide copolymer which contains from 5-50% by weight of a lower alkyl substituted tertiary aminoethyl methacrylate and quaternary ammonium salts thereof in an amount to provide at least 20 parts per million of the acrylamide copolymer; (b) adjusting the pH of the emulsion being treated with ammonia to at least 9; (c) adding to the ammonia treated emulsion a water-soluble surfactant which is capable of inverting the water-in-oil emulsion which contains the polymer; and then (d) slowly mixing the treated oil-in-water emulsion for at least one-half hour to obtain good resolution thereof.
A method of resolving oil-in-water emulsions resulting from the organic solvent extraction of uranium from aqueous acidic leach liquors which comprises treating said emulsions in accordance with the following steps: (a) adding to said emulsions a water-in-oil emulsion which contains from 2-50% by weight of a water-soluble acrylamide copolymer which contains from 5-50% by weight of a lower alkyl substituted tertiary aminoethyl methacrylate and quaternary ammonium salts thereof in an amount to provide at least 20 parts per million of the acrylamide copolymer; (b) adjusting the pH of the emulsion being treated with ammonia to at least 9; (c) adding to the ammonia treated emulsion a water-soluble surfactant which is capable of inverting the water-in-oil emulsion which contains the polymer; and then (d) slowly mixing the treated oil-in-water emulsion for at least one-half hour to obtain good resolution thereof.
Claim 2
Independent Claim
139 words
A method of resolving oil-in-water emulsions resulting from the organic solvent extraction of uranium from aqueous acidic leach liquors which comprises treating said emulsions in accordance with the following steps: (a) adding to said emulsions a water-in-oil emulsion which contains from 2-50% by weight of a water-soluble acrylamide copolymer which contains from 5-50% by weight of a lower alkyl substituted tertiary aminoethyl methacrylate and quaternary ammonium salts thereof in an amount to provide at least 20 parts per million of the acrylamide copolymer; (b) adjusting the pH of the emulsion being treated with ammonia to at least 9; (c) adding to the ammonia treated emulsion a water-soluble surfactant which is capable of inverting the water-in-oil emulsion which contains the polymer; and then (d) slowly mixing the treated oil-in-water emulsion for at least one-half hour to obtain good resolution thereof.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein the organic solvent comprises an organic hydrocarbon liquid which contains a fatty substituted amine and the lower alkyl substituted tertiary aminoethyl methacrylate is dimethylaminoethylmethacrylate which is used at a dosage ranging from 20-200 ppm.