Extracting chromium (III) from aqueous solutions with 2-ethylhex

Details Extracting chromium (III) from aqueous solutions with 2-ethylhex Extracting chromium (III) from aqueous solutions with 2-ethylhex

1983-08-01

1984-03-13

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

75101BE, C01G 3700

Patent

active

044367058

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.

REFERENCES:
patent: 4016054 (1977-04-01), Gandon et al.
patent: 4082832 (1978-04-01), Watanabe et al.
patent: 4226791 (1980-10-01), Reinhardt et al.
patent: 4230677 (1980-10-01), Kagetsu et al.
patent: 4269705 (1981-05-01), Yoshioka et al.

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