Process for preparing high solids slurries

Details Process for preparing high solids slurries Process for preparing high solids slurries

C - Chemistry, Metallurgy

09

C

6/206, 117/47.7

C09C 3/08 (2006.01) C09D 17/00 (2006.01) D21H 17/67 (2006.01)

Patent

CA 2010869

A titanium dioxide pigment slurry containing from about 70 to about 80 percent by weight solids content is provided by dewatering, at superatmospheric pressure, a highly dispersed pigment slurry containing from about 20 to about 50 percent by weight of an untreated, nonflocculated titanium dioxide pigment and which slurry has a pH of below about 4.0 or above about 8.0 to produce a wet filter cake. The wet filter cake is reslurried in the presence of a dispersing agent. The high solids content slurry preferably is prepared from rutile titanium dioxide pigment.

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