Hydroxameted polymers in the bayer process to reduce solids

Details Hydroxameted polymers in the bayer process to reduce solids Hydroxameted polymers in the bayer process to reduce solids

1995-10-31

1997-02-11

Hadskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

209 5, 210728, 210734, 423121, 423122, B01D 2101

Patent

active

056017260

ABSTRACT:
The filtration rate of Bayer Process primary settler overflow and/or the flocculation in the initial stages of the washer train in the Bayer Process are improved by contacting the settler feed stream or the feed stream to the first stages of the washer train first with a) a lower molecular weight polymer which contains hydroxamic acid and/or salt groups and then with b) a mixture of an anionic polymer and a second, higher molecular weight polymer which contains hydroxamic acid groups.

REFERENCES:
patent: 3493499 (1970-02-01), Zeitoun
patent: 4678585 (1987-07-01), Brownrigg
patent: 4767540 (1988-08-01), Spitzer et al.
patent: 5041269 (1991-08-01), Moody et al.
patent: 5178774 (1993-01-01), Payne et al.
patent: 5217620 (1993-06-01), Mahoney et al.
patent: 5516435 (1996-05-01), Lewellyn
patent: 5539046 (1996-07-01), Lewellyn

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