Process for preparing high solids slurries

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

1989-05-12

1990-12-18

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106444, 106499, C09C 136

Patent

active

049783963

ABSTRACT:
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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patent: 3981978 (1976-09-01), Weiler et al.
patent: 4115144 (1978-09-01), Chambers et al.
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patent: 4280849 (1981-07-01), Howard et al.
patent: 4288254 (1981-09-01), Gladu
patent: 4448609 (1984-05-01), Tear et al.

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