Production of reduced charge montmorillonite pigment

Details Production of reduced charge montmorillonite pigment Production of reduced charge montmorillonite pigment

1976-09-22

1977-10-11

Garvin, Patrick P.

Compositions: coating or plastic

Materials or ingredients

106 72, 427146, 428331, C09C 128

Patent

active

040533247

ABSTRACT:
Preparation of so-called "reduced charge" montmorillonite or bentonite pigment from a naturally-occurring crude clay containing dioctahedral montmorillonite by ion-exchanging cations in the clay with hydrogen ions while the clay is in slurry form, filtering, pugging the filter cake with a preselected amount of a neutral or alkaline lithium salt, preferably the oxide, hydroxide or carbonate, and heat treating to collapse the mineral structure.

REFERENCES:
patent: 3395029 (1968-07-01), Bizzarri
patent: 3622364 (1971-11-01), Sugahara et al.
patent: 3753761 (1973-08-01), Sugahara et al.
patent: 3915731 (1975-10-01), Sugahara et al.
patent: 3993500 (1976-11-01), Isaac et al.

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