Chromate reduction in aqueous medium

Details Chromate reduction in aqueous medium Chromate reduction in aqueous medium

1975-10-31

1977-07-05

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 38B, 210 50, 210 51, 210DIG30, 423 55, 423607, C02C 502

Patent

active

040338673

ABSTRACT:
A method for reducing the residual chromate level in effluent waters comprising catalytic reduction of the chromate ion by hydrogen to the trivalent chromium state and removal of the chromium by passage through a cation exchange resin column or by base precipitation in a settling pond.

REFERENCES:
patent: 2760844 (1956-08-01), Fox
patent: 2879134 (1959-03-01), Halpern
patent: 3666447 (1972-05-01), Saubestre
patent: 3681210 (1972-08-01), Sievers et al.
patent: 3716485 (1973-02-01), Robertson
patent: 3725259 (1973-04-01), Depree
patent: 3761381 (1973-09-01), Yagishita
patent: 3810542 (1974-05-01), Gloster et al.
Watson, Pollution Control in Metal Finishing, 1973, pp. 90-95.
Morrison, "Cr Recovery from Plating Solutions" Ion Exchange Technology, p. 321-332, 1956.
Literature Review, WPCFJ, vol. 45, 1973, p. 1195.

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