Extracting chromium (iii) from aqueous solutions with...

Details Extracting chromium (iii) from aqueous solutions with... Extracting chromium (iii) from aqueous solutions with...

C - Chemistry, Metallurgy

22

B

53/119

C22B 34/32 (2006.01) C01G 37/00 (2006.01) C22B 3/38 (2006.01)

Patent

CA 1220945

EXTRACTING CHROMIUM (III) FROM AQUEOUS SOLUTIONS WITH 2-ETHYLHEXYL ACID PHOSPHATE ABSTRACT This invention concerns a process for extracting chromium (III) from an aqueous solution containing chromium (III) with an extractant comprising a mixture of mono-2-ethylhexyl phosphoric acid and di-2-ethylhexyl phosphoric acid. An organic solvent such as a low aromatic kerosene is employed in this invention for dilution and dissolution of the extractant. Aqueous acid waste streams containing chromium (III) can be reduced to a chromium (III) concentration of 80 ppm thereby enabling the stream to be reclaimed.

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