METHOD OF REMOVING ARSENIC FROM ARSENIC-CONTAINING MATERIALS Russian patent published in 2004 - IPC

Abstract RU 2226562 C2

FIELD: nonferrous metallurgy. SUBSTANCE: arsenic is precipitated in neutral medium by ferric sulfate taken in proportion (3.5-5.5):1 to dissolved arsenic. In order to transfer ions Fe²⁺→ Fe³⁺ and As³⁺→ As⁵⁺, any oxidant, e. g. pyrolusite, may be used. EFFECT: increased removal of arsenic from production cycle, minimized environmental danger due to reduced maximum allowed concentration of soluble forms, and reduced expenses to reusing reagents. 3 ex

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RU 2 226 562 C2

Authors

Van Elena Jur'Evna

Van Andrej Gennad'Evich

Van Konstantin Gennad'Evich

Dates

2004-04-10—Published

2002-03-20—Filed