Removal of chromium from solution using ferrous sulfate and bari

Details Removal of chromium from solution using ferrous sulfate and bari Removal of chromium from solution using ferrous sulfate and bari

1993-11-29

1995-06-27

Bos, Steven

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210913, 423 55, 204DIG13, C02F 152, C02F 170, C01G 3700

Patent

active

054276926

ABSTRACT:
Hexavalent chromium is removed from aqueous sodium nitrate solutions by reacting hexavalent chromium with an aqueous slurry consisting essentially of ferrous hydroxide and barium sulfate whereby the chromium is reduced to trivalent chromium and precipitated as chromic hydroxide. Adulterating compounds and unwanted ions are not introduced to the electrolytic solution.

REFERENCES:
patent: 2110187 (1938-03-01), Williams
patent: 3616344 (1971-10-01), Peterson
patent: 4086150 (1978-04-01), Kindl et al.
patent: 4481090 (1984-11-01), Childs
patent: 4705639 (1987-11-01), Aldrich
Article--Chapter 7, Removal of Chromate from Aqueous Streams by Ultrafiltration and Precipitation, EE Tucker et al--American Chemical Society (1992) pp. 84-98, no month.

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