Process for the production of titanium dioxide pigments

Details Process for the production of titanium dioxide pigments Process for the production of titanium dioxide pigments

1988-11-23

1990-02-20

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 85, 423610, 423615, 423616, C01G 2304

Patent

active

049024850

ABSTRACT:
A process for the production of TiO.sub.2 pigments by the sulfate process by digestion of titanium-containing raw materials with sulfuric acid, hydrolysis of the titanyl sulfate formed, purification of the hydrolyzate and calcination of the hydrolyzate in rotary kilns, wherein the calcination conditions are regulated through adjustment of the SO.sub.2 content of the waste gases issuing from the rotary kilns used for calcination.

REFERENCES:
patent: 3105144 (1963-10-01), Luethge
patent: 3211538 (1965-10-01), Gross et al.
patent: 3848860 (1974-11-01), Maeda et al.
patent: 3868441 (1975-02-01), Agee et al.
patent: 4663131 (1987-05-01), Gerken et al.

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