Use of selected catalyzed hydrazine compositions to reduce hexav

Details Use of selected catalyzed hydrazine compositions to reduce hexav Use of selected catalyzed hydrazine compositions to reduce hexav

1982-04-29

1983-01-04

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423 55, 210720, 210757, C01G 3702

Patent

active

043672132

ABSTRACT:
Disclosed is a process for reducing hexavalent chromium [Cr(VI)] in aqueous solutions to trivalent chromium [Cr(III)] by reacting a catalyzed hydrazine composition with the hexavalent chromium at a pH in the range from about 6.0 to about 8.0 to form an aqueous slurry of trivalent chromium compound, said catalyzed hydrazine composition comprising

REFERENCES:
patent: 4026664 (1977-05-01), Noack
patent: 4079018 (1978-03-01), Noack
patent: 4086150 (1978-04-01), Kindl et al.
patent: 4124500 (1978-11-01), Arghiropoulos et al.
patent: 4268486 (1981-05-01), Noack et al.
Olin Corporation Application Data Sheet entitled "Hydrazine for Chromium (VI) Reduction", published 1981.
Olin Corporation Data Sheets for Scav-Ox.RTM. II and Scav-Ox Plus.RTM., published 1980 and 1981.
Product brochure by Olin Corporation for Scav-Ox.RTM. hydrazine products.

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