Opposite phase entrainment reduction in solvent extraction/elect

Details Opposite phase entrainment reduction in solvent extraction/elect Opposite phase entrainment reduction in solvent extraction/elect

1996-08-19

1998-05-26

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 9, 423 10, 423 24, 423112, 423DIG14, B01D 1100, C22B 6002, C22B 1500, C22B 3500

Patent

active

057582556

ABSTRACT:
A method of reducing the entrainment of aqueous mineral acid solutions in organic extractants used in the solvent extraction of metals from the aqueous fluid is disclosed. The method comprises adding an effective, entrainment prevention amount of a water soluble cationic polymer having a molecular weight of from about 10,000 to about 500,000 to a metal rich aqueous mineral acid solution, immediately prior to, or during mixing with a metal poor organic extractant, and then recovering a metal poor aqueous mineral acid phase, and a metal rich organic extractant phase having a reduced level of entrainment of the aqueous mineral acid solution. In a preferred embodiment the metal is copper, and the polymer is poly(diallyldimethylammonium) chloride.

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"Evaluation of Copper Dump and Heap Leaching Situations", J.M. Keane & C. K. Chase, Mining Engineering, pp. 197-200, Mar. 1987.

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