Reversible deflocculation of clay slurries

Details Reversible deflocculation of clay slurries Reversible deflocculation of clay slurries

1980-06-05

1982-04-27

Hruskoci, Peter A.

Compositions: ceramic

Ceramic compositions

Clay containing

209 5, 210698, C09C 142

Patent

active

043271898

ABSTRACT:
Various clay substances, such as kaolin, can be reversibly deflocculated by treating the flocculant clay slurry with a deflocculating amount of a polymer having the general formula: ##STR1## wherein n averages at least 4; M is selected from the group consisting of alkali metals, ammonium, and alkanol amine groups having from 1 to about 4 carbon atoms; R.sup.1 and R.sup.2 are individually any chemically stable group which stabilizes the polymer against rapid depolymerization in alkaline solution. When the polymer depolymerizes, the clay slurry will reflocculate under agitated or quiescent conditions. The length of time that the slurry remains fluid depends on the pH, the concentration of the polymer, and the hydrolytic stability of the polymer.

REFERENCES:
patent: 3737333 (1973-06-01), Sawyer
patent: 3856755 (1974-12-01), Vogt et al.
patent: 4144226 (1979-03-01), Crutchfield et al.
patent: 4186027 (1980-01-01), Bell et al.

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