Process for disposal of arsenic salts

Details Process for disposal of arsenic salts Process for disposal of arsenic salts

1977-09-02

1978-10-03

Hearn, Brian

Compositions: coating or plastic

Coating or plastic compositions

Proteinaceous material containing

210 50, 423 87, C04B 1110

Patent

active

041182430

ABSTRACT:
Arsenic-containing waste materials comprising water-soluble arsenic salts are processed to a product which comprises water-insoluble arsenic salts by reacting the same in an aqueous system with sulfuric acid and calcium hydroxide in the presence of sulfate ions and ferrous and/or ferric ions, and thereafter curing the system to solid form.
The process can be practiced with conventional waste materials without preliminary special processing, and provides a product which can be easily handled and is amenable to secure landfill disposal.

REFERENCES:
patent: 1672584 (1928-06-01), Travers
patent: 2165344 (1939-07-01), Colton
patent: 2240254 (1941-04-01), Colton
patent: 2316039 (1943-04-01), Wilson
patent: 3855391 (1974-12-01), Selmeczi et al.
patent: 4049462 (1977-09-01), Cocozza
Boynton, Chemistry and Technology of Lime and Limestone, Interscience, N.Y., (1966), [TP886B68], pp. 267, 268, 362-364, 368-373.

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