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US 4,536,268 AGranted
Process for the reduction of the viscosity of high solids pigment slurries
AssigneeAmerican Cyanamid Company
InventorEarl R. Lawhorne
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Abstract
A process for the reduction of the viscosity of high solids pigment slurries is disclosed whereby the slurries are subjected to electrodialysis utilizing an ammonium salt or dilute acid solution as the anolyte.
Claims4
A method for reducing the viscosity of an aqueous pigment slurry which comprises
- (a) placing a high solids content TiO.sub.2 pigment slurry into a cathode compartment separated from an anode compartment by a low porosity permeable membrane,
- (b) placing an ammonium or dilute acid anolyte solution in said anode compartment,
- (c) passing electric current through said cathode and anode compartments and
- (d) recovering the resultant pigment slurry, whereby said slurry is of a reduced viscosity.
1 more element
Dependencies are inferred from the claim text.