Biopolymer use as a sand filter aid

Details Biopolymer use as a sand filter aid Biopolymer use as a sand filter aid

1996-12-13

1998-02-10

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

209 5, 210730, 210731, 210734, 210778, 423122, B01D 2101

Patent

active

057165300

ABSTRACT:
In the Bayer process for producing alumina from bauxite of the type wherein the bauxite is added to a caustic solution to produce a soluble aluminate solution and an insoluble red mud fraction which is then subjected to one or more separation steps to produce a thickener overflow which is then subjected to a Sand Filter to polish the thickener overflow the improvement which comprises treating the thickener overflow with a solids removal efficiency improving amount of a biopolymer.

REFERENCES:
patent: 3085853 (1963-04-01), Lesinski et al.
patent: 3975496 (1976-08-01), Smalley et al.
patent: 5008089 (1991-04-01), Moody et al.
patent: 5041269 (1991-08-01), Moody et al.
patent: 5091159 (1992-02-01), Connelly et al.
patent: 5217620 (1993-06-01), Mahoney et al.
patent: 5387405 (1995-02-01), Connelly et al.

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