METHOD OF PHOSPHORIC ACID PURIFICATION FROM ARSENIC Russian patent published in 1995 - IPC

Abstract RU 2033965 C1

FIELD: chemical technology. SUBSTANCE: method involves treatment of acid with reductant. Depleted iron-containing catalyst CA-1 used in ammonia synthesis is used as reductant, and evolving gases were absorbed with acid aqueous solutions with pH 1-3. EFFECT: increased purification degree, diminished energy consumption. 1 tbl

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RU 2 033 965 C1

Authors

Stepchenko A.G.

Shirobokov O.A.

Kolesnikova T.G.

Ljutkajtite E.K.

Dates

1995-04-30—Published

1991-07-12—Filed