Process for the production of synthetic rutile

Details Process for the production of synthetic rutile Process for the production of synthetic rutile

1978-05-26

1980-04-22

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 82, 423 86, 75 1TI, C01G 2304

Patent

active

041995520

ABSTRACT:
An improved process for the production of synthetic rutile from ore containing titanium and iron, such as ilmenite ore, by a multi-step procedure employing controlled reduction, controlled oxidation and acid leaching. More specifically, the ilmenite ore first is reduced thermally such that substantially all of the iron (III) present has been converted to iron (II) and some metallic iron. The reduced ore then is oxidized with an oxidizing gas substantially free of elemental oxygen to convert the metallic iron to iron (II) without the substantial formation of iron (III). The oxidized ore then is leached to remove the iron (II) and calcined to produce synthetic rutile. The synthetic rutile so produced contains in excess of 92 percent titanium dioxide and less than 2 percent iron (III), by weight. Often, the synthetic rutile contains less than 1 percent total iron by weight.

REFERENCES:
patent: 2339808 (1944-01-01), Ravnestad et al.
patent: 3660029 (1972-05-01), Naguib
patent: 3734996 (1973-05-01), Bade et al.
patent: 3929963 (1975-12-01), Kurata et al.
patent: 4038364 (1977-07-01), Lailach

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