Chromium and zinc removal and recovery by ion exchange

Details Chromium and zinc removal and recovery by ion exchange Chromium and zinc removal and recovery by ion exchange

C - Chemistry, Metallurgy

02

F

53/119, 53/329,

C02F 1/42 (2006.01)

Patent

CA 1160458

A B S T R A C T In the removal of chromium and zinc, the combination of an anion exchange resin and cation exchange resin in a single vessel, the anion exchange resin being selective of chromium in its chromate and dichromate ionic forms, and the cation exchange resin being an intermediate acid cation exchange resin with a phosphonic acid functional group on a cross-linked polystyrene matrix, having the repeating structural formula: Image selective of zinc in its ionic form, said single vessel, having distributors selected from the group of inlet distributors, regenerant distributors, sub- surface washers, collectors, disposed therein, and inlets and outlets for the addition or removal of effluent, water and regenerant.

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