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

1980-12-15

1983-03-15

Cintins, Ivars C.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210684, 210686, 210688, 423 54, 423100, C02F 142

Patent

active

043767060

ABSTRACT:
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: ##STR1## selective of zinc in its ionic form, said single vessel, having distributors selected from the group of inlet distributors, regenerant distributors, subsurface washers, collectors, disposed therein, and inlets and outlets for the addition or removal of effluent, water and regenerant.

REFERENCES:
patent: 2844546 (1958-07-01), Abrams
patent: 3527718 (1970-09-01), Coburn
patent: 4036751 (1977-07-01), Orita et al.
patent: 4057494 (1977-11-01), Chopra

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