PROCESSING OF CLAYS

摘要

"Improvements in or relating to the processing of clays". A process for treating a clay mineral of the kandite group by contacting a fluid suspension of the clay mineral with a reducing bleaching agent for a time sufficient to give a desired improvement in brightness of the clay, wherein the fluid suspension of the clay mineral in water has a solids content of at least 50% by weight and a pH greater than 7.0 and contains a dispersing agent.