Removal of copper and zinc species from Bayer process liquor by

Details Removal of copper and zinc species from Bayer process liquor by Removal of copper and zinc species from Bayer process liquor by

1981-12-21

1983-11-08

Castel, Benoit

Liquid purification or separation

Processes

Ion exchange or selective sorption

210673, 210688, 210777, 210807, 210506, 210912, 423 37, 423101, C02F 152

Patent

active

044141157

ABSTRACT:
A Bayer process solution is filtered through a bed of particles of a granular substance containing Fe.sub.2 O.sub.3 to remove copper and zinc species from the solution. The particles preferably have an Fe.sub.2 O.sub.3 content of about 40 to 100% by weight. For more effective removal of zinc, the particles are coated with a metal sulfide, preferably zinc sulfide.

REFERENCES:
patent: 3989623 (1976-11-01), Neal
patent: 4094777 (1978-06-01), Sugier et al.
patent: 4280925 (1981-07-01), Kiefer

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