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    • 3. 发明授权
    • Solvent extraction of impurity metals from a valuable metal sulphate solution
    • 从有价值的金属硫酸盐溶液中溶剂萃取杂质金属
    • US07727496B2
    • 2010-06-01
    • US10168704
    • 2000-12-19
    • John O'CallaghanTony Chamberlain
    • John O'CallaghanTony Chamberlain
    • B01D11/00
    • C22B3/0066C22B23/043C22B23/0453C22B23/0484Y02P10/234
    • The present invention relates generally to a method of extracting cobalt and other impurity metals from a concentrated nickel sulphate solution by a solvent extraction process whereby a cationic solvent extractant is separately pre-equilibrated with a portion of a purified nickel sulphate solution in such a manner that it is loaded with nickel without precipitating insoluble nickel double salts. The nickel loaded extracted is then transferred to an impure cobalt nickel solution where the cobalt and certain other impurity metals exchange with nickel leaving a purified concentrated nickel sulphate solution suitable for hydrogen reduction or electrowinning. The cobalt loaded extractant is stripped with dilute sulphuric acid before being recycled while an aqueous cobalt stripped solution is further processed to recover cobalt.
    • 本发明一般涉及一种通过溶剂萃取方法从浓硫酸镍溶液中提取钴和其它杂质金属的方法,其中阳离子溶剂萃取剂与一部分纯化的硫酸镍溶液分开预平衡,使得 它装载有镍,而不会沉淀出不溶性的镍复合盐。 然后将镍负载的萃取物转移到不纯的钴镍溶液中,其中钴和某些其它杂质金属与镍交换,留下适合于氢还原或电解沉积的纯化的浓硫酸镍溶液。 将钴负载的萃取剂在再循环之前用稀硫酸汽提,同时进一步处理钴汽提溶液以回收钴。