Method of treating residual acid

Details Method of treating residual acid Method of treating residual acid

2005-02-08

2005-02-08

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C423S558000, C423S146000, C423SDIG001, C423SDIG002

Reexamination Certificate

active

06852297

ABSTRACT:
A method of treating residual acid from production of chlorine dioxide is described. The method is characterized in that a compound containing iron is added to the residual acid to react therewith and form a product, which contains iron in trivalent form. As iron compound preferably ferrous sulphate is added, which under oxidation reacts with the residual acid to form ferric salt. Preferably sodium chlorate, sodium hypochlorite, hydrogen peroxide or an oxygen-containing gas is added as oxidant.

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Database WPI, Week 200055, Derwent Publication Ltd., London, GB; AN 2000-579818 & CN1259592 A(Chen X, Gu J, Shang G) Jul. 12, 2000, Abstract.

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