Process for the production of an iron-free chronium (III) compou

Details Process for the production of an iron-free chronium (III) compou Process for the production of an iron-free chronium (III) compou

1981-07-22

1983-07-12

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 53, C01G 3700

Patent

active

043930298

ABSTRACT:
An iron-free chromium(III) compound is precipitated at an elevated temperature and pressure from an acidic aqueous solution which contains iron and chromium. In order to prevent coprecipitation of iron, an additive is added to the precipitation stage in an amount sufficient to provide in the precipitation conditions at least 2 g/l of bivalent chromium in the solution.

REFERENCES:
patent: 3896209 (1975-07-01), Fournier et al.
patent: 3961029 (1976-06-01), Senoo
patent: 4086150 (1978-04-01), Kindl et al.
patent: 4108596 (1978-08-01), Hemming et al.
patent: 4168240 (1979-09-01), Bockelmann et al.
patent: 4207295 (1980-06-01), Kagetsu et al.
patent: 4259297 (1981-03-01), Kaczur et al.

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