Process for recycling chemical plant waste streams containing re

Details Process for recycling chemical plant waste streams containing re Process for recycling chemical plant waste streams containing re

1978-09-28

1980-09-23

Langel, Wayne A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423165, 423499, C01D 308

Patent

active

042242908

ABSTRACT:
Aqueous waste streams containing recoverable chlorine are reacted with an aqueous solution of an alkali metal hypohalite, such as sodium hypochlorite, to form an aqueous salt solution of an alkali metal halide, such as sodium chloride, and an alkaline earth metal hypohalite, such as calcium hypochlorite. Thereafter the aqueous salt solution is admixed with an organic alcohol to form an organic-aqueous salt solution. A gas containing chemically bound oxygen, such as carbon dioxide, is reacted with the organic-aqueous salt solution to form a slurry of solid particles of calcium carbonate suspended in a liquid mixture. The solid particles of calcium carbonate are separated from the liquid mixture.
The aqueous phase containing sodium chloride may be recycled for use as a reactant in a chlor-alkali electrolytic cell. The organic phase containing organic hypochlorite may be used as a chlorinating agent or may be treated with an acid, such as hydrochloric acid, to reclaim free chlorine.

REFERENCES:
patent: 1713650 (1929-05-01), George et al.
patent: 2694722 (1954-11-01), Katz
patent: 3134641 (1964-05-01), Gleichert
patent: 3584996 (1971-06-01), Hughes

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