Bayer liquor polishing

Details Bayer liquor polishing Bayer liquor polishing

1993-06-24

1995-02-07

Brunsman, David

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423121, 210651, 210654, 210705, 210710, 210727, 210730, 210732, 210733, C01F 700, C02F 156

Patent

active

053874056

ABSTRACT:
A secondary polishing process for Bayer Process liquors suspension is described. The polishing process uses a combination of bio-polymers, particularly such bio-carbohydrates as dextran, with an inert insoluble solid, such as a filter aid, to treat the primary red mud settler overflow, then clarifying these treated overflow liquors in a secondary clarifier. Results provide for from 0-20 milligrams per liter suspended solids, often from 0-5 ppm suspended solids, and may make sand filter or Kelly filter operation an option in the Bayer Process.

REFERENCES:
patent: 3085853 (1963-04-01), Lesinski et al.
patent: 4997573 (1991-03-01), Browne
patent: 5008089 (1991-04-01), Moody et al.

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