Methylated starch compositions and their use as flocculating age

Details Methylated starch compositions and their use as flocculating age Methylated starch compositions and their use as flocculating age

1987-10-21

1989-06-13

Stoll, Robert L.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

423122, 423 42, 423 55, 423 65, 423 92, 423140, 423158, 423184, 423111, 210729, 210728, 210705, 75 2, 252 60, 252 61, 536102, 536107, 127 33, 127 32, 127 70, 127 71, C02F 154, B03D 306

Patent

active

048390607

ABSTRACT:
Modified starch compositions and their use for flocculating mineral waste residues, particularly the red mud containing alumina liquors from bauxite residues, comprising the addition to an alumina liquor of a flocculating amount of a methylated starch which, optionally, may be hydrolyzed, or a methylated starch which is also sulfonated and, optionally, may be hydrolyzed. Preferably, the methylated starch compositions are potato and dasheen starch derivatives prepared at temperatures of about 50.degree. to about 85.degree. C.

REFERENCES:
patent: 2806766 (1957-09-01), Anderson
patent: 3127239 (1964-03-01), Cook
patent: 3142637 (1964-07-01), Cook et al.
patent: 3390959 (1968-07-01), Sibert et al.
patent: 3669915 (1972-06-01), Jones et al.
patent: 3975496 (1976-08-01), Smalley et al.

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