Process for beneficiating bentonite

Details Process for beneficiating bentonite Process for beneficiating bentonite

1983-05-10

1984-11-20

Doll, John

Compositions: ceramic

Ceramic compositions

Clay containing

106DIG4, 423131, 501145, 501146, C01B 3313

Patent

active

044839340

ABSTRACT:
Raw bentonite is beneficiated by treating a substantially iron oxide-free bentonite, as an aqueous suspension, with an alkali at a temperature of at least 60.degree. C.; washing the alkali treated bentonite at least once with water; and then subjecting a suspension of the alkali-treated and washed bentonite to shearing, attrition and impact forces in a homogenizer of the type wherein the suspension is forced in the form of a film through a thin, hard-surfaced gap under a pressure of at least 1.7 MPa, and at high velocity. The suspension of bentonite thus obtained can then be dried to a product which has a good white color and is more resistent to bacteriological growth.

REFERENCES:
patent: 2305404 (1942-12-01), Brown
patent: 3039703 (1962-06-01), Cohn et al.
patent: 3162379 (1964-12-01), Cohn et al.
patent: 3193344 (1965-07-01), Iannicelli et al.
patent: 3408305 (1968-10-01), Torok
patent: 3899343 (1975-08-01), Lim
patent: 4371626 (1983-02-01), Hertz

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