| 摘要 |
Mercury is recovered from brines containing mercury in the form of soluble salts, preferably the chloride, by passing the brine over and through a strongly basic anion exchange resin and recovering the mercury from the resin by treating with an excess of an aqueous sulphide solution, for example sodium, potassium, lithium caesium, rubidium, ammonium or hydrogen sulphide, which preferably is from 1/20 to 3N, and is preferably employed in an excess of 100 to 400% over that theoretically required. The brine may derive from mercury cathode electrolytic cells. The resins employed are preferably those containing quaternary ammonium groups, especially those whose recurring units have a structure of one of the following types. <FORM:0914918/III/1> <FORM:0914918/III/2> where X is any negatively charged atom or radical, for example OH-, Cl-, Br-, 1-, NO3-. The mercury may be recovered from the sulphide solution by conventional means. |
