High solids content titanium dioxide suspension

Details High solids content titanium dioxide suspension High solids content titanium dioxide suspension

1993-07-12

1995-02-28

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

106436, C01G 2304, C09C 136

Patent

active

053935101

ABSTRACT:
A finely divided chloride process titanium dioxide prepared without the use of a dispersing agent. The slurry is dewatered via filtration, and the resulting filter cake is made flowable with an anionic dispersing agent. In order to attain a filter cake with very high solids content, the slurry should contain no, or only very few, multivalent anions. The conditions regarding the content of multivalent anions of the slurry are achieved by selection of suitable dechlorinating agents, especially hydrogen peroxide. The filter cake is thixotropic and is made flowable by the fact that it is put into the "diluted" dispersing agent, especially into a part of the titanium dioxide suspension to which the required quantity of dispersing agent has previously been added. Titanium dioxide suspensions with solids content of approximately 78% are thereby obtained and are of particular use in the paper industry.

REFERENCES:
patent: 3758322 (1973-09-01), Roberts, Jr. et al.
patent: 4225564 (1980-09-01), Tolley
patent: 4280849 (1981-07-01), Howard et al.
patent: 4288254 (1981-09-01), Gladu
patent: 4355015 (1982-10-01), Heckel et al.
patent: 4978396 (1990-12-01), Story

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