Treating hydrolysis residues from preparation of titanium dioxid

Details Treating hydrolysis residues from preparation of titanium dioxid Treating hydrolysis residues from preparation of titanium dioxid

1980-12-05

1982-03-23

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

75 1T, 423 69, C01G 2300

Patent

active

043212379

ABSTRACT:
In the process wherein a titanium-containing material is subjected to react with sulphuric acid to form a solid reaction mass from which the titanium values are recovered in solution by digestion with water or dilute sulphuric acid leaving behind a reaction residue and the reaction residue is thereafter treated to recover at least part of the titanium contained therein, the improvement wherein the treatment of the reaction residue is effected by contacting with sulphuric acid of a concentration greater than 86% a mixture by weight comprising about 5 to 95% of the reaction residue and 95 to 5% of a slag having a TiO.sub.2 content 60% by weight and a Ti(III) content of about 5 to 40% by weight, and thereafter eventually adding water, steam or dilute sulphuric acid to the mass to start the reaction.

REFERENCES:
patent: 2180961 (1939-11-01), Kramer
patent: 2329641 (1943-09-01), Moran et al.
patent: 2631924 (1953-03-01), McKinney

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