Method for improved flotation of discoloring impurities from kao

Details Method for improved flotation of discoloring impurities from kao Method for improved flotation of discoloring impurities from kao

1989-11-13

1991-03-05

Lacey, David L.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209167, B03D 112, B03D 12

Patent

active

049975501

ABSTRACT:
Flotation of a kaolin clay slurry to remove titanium-based impurities is improved by adding a biocide to the slurry prior to the flotation and effecting the flotation in the presence of the biocide. The addition of the biocide improves the efficacy of flotation and thereby increases the brightness of the clay. Preferred biocides are tetrahydrothiadiazine thiones, especially tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione.

REFERENCES:
patent: 3266917 (1966-08-01), Sawyer
patent: 3282715 (1966-11-01), Sawyer
patent: 3337048 (1967-08-01), Mercade
patent: 3450257 (1969-06-01), Cundy
patent: 3462013 (1969-08-01), Mercade
patent: 3503499 (1970-03-01), Allegrini
patent: 3594203 (1971-07-01), Sawyer
patent: 3655038 (1972-04-01), Mercade

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