Process for the separation of sulphate

Details Process for the separation of sulphate Process for the separation of sulphate

1990-07-16

1992-03-03

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423193, 423184, 423190, 423551, C01G 3700

Patent

active

050930893

ABSTRACT:
Process for separating sulphate from a contaminating chromium component contained in an aqueous liquor by the crystallization of a sulphate compound. The sulphate may be separated substantially free of chromium component by adjustment of the pH to the range of from about 2.0 to about 6.5, followed by cooling of the liquor to precipitate the sulphate compound from solution which sulphate is subsequently removed. The process provides an effective method for the separation of sulphate from dichromate, and is particularly useful in the production of chlorate.

REFERENCES:
patent: 3970528 (1976-06-01), Zirngiebl et al.
patent: 4132759 (1979-01-01), Schafer
patent: 4259297 (1981-03-01), Kaczur et al.
patent: 4268486 (1981-05-01), Noack et al.
patent: 4636376 (1987-01-01), Maloney et al.
patent: 4702805 (1987-10-01), Burkell et al.
patent: 4795535 (1989-01-01), Bolduc et al.

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