Method for removal of hexavalent chromium from a solution

Details Method for removal of hexavalent chromium from a solution Method for removal of hexavalent chromium from a solution

1993-06-24

1995-05-16

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 57, 423166, 210749, 210757, 210913, 204DIG13, C22B 3430, C01G 3700, C02F 100

Patent

active

054158486

ABSTRACT:
A process for removing chromium from an aqueous electrolyte solution is disclosed. The process involves admixing with the solution an amount of a chromium-reducing compound and an amount of a precipitant for the anion of the chromium-reducing compound. The invention provides for substantially complete reduction of hexavalent chromium to trivalent chromium and the formation of an insoluble chromium-containing material without leaving unwanted ions in the aqueous electrolyte solution. The aqueous electrolyte solution is regenerated by adjustment of pH and electrolyte concentration.

REFERENCES:
patent: 3607482 (1971-09-01), Selm
patent: 3810542 (1974-05-01), Gloster

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