Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group viib metal
Patent
1976-04-30
1978-01-17
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group viib metal
423 61, 423 68, 423 81, 423 84, 423393, 75 24, 75 1T, 75257, C01G 4500, C01G 3714, C01G 3100, C01G 2308
Patent
active
040692957
ABSTRACT:
A method of treating raw materials containing components of metals of the group IVb of the Periodic Table, which comprises heat-treating a raw material of a component of a metal of the group IVb of the Periodic Table containing coloring poisonous metal components such as Mn, V and Cr components in the presence of a flux composed mainly of an alkali metal nitrate or an alkali metal peroxide which is a thermal decomposition product of the alkali metal nitrate in an amount 2 to 5 times the amount of the raw material on the weight basis in a non-reducing atmosphere to thereby effect fluxing reaction, and subjecting the resulting fluxing reaction product to a leaching treatment of at least one stage in an aqueous medium to separate the fluxing reaction product into said coloring metal components and a concentrate of the component of the group IVb of the Periodic Table which is acid-soluble and substantially free of said coloring poisonous metal components. In practising this treating method, if a residue left after the above leaching step is incorporated into a mixture of the raw material and the flux, the composition is granulated and the granulated composition is heat-treated, the fluxing reaction of the raw material can be accomplished while keeping the granulated composition in the substantially non-sticky granular state throughout the fluxing heat treatment.
REFERENCES:
patent: 1454564 (1923-05-01), Ruff
patent: 1609826 (1926-12-01), Kinzie
patent: 2256536 (1941-09-01), Udy
patent: 2501952 (1950-03-01), Maier
patent: 3137541 (1964-06-01), Cooke
patent: 3447894 (1969-06-01), Gustison et al.
patent: 3859412 (1975-01-01), Okabe et al.
Maruyama Noboru
Naito Hiroyuki
Noshi Yoshibumi
Sugahara Yujiro
Takai Kiyoshi
Hearn Brian E.
Mizusawa Kagaku Kogyo Kabushiki Kaisha
Vertiz O. R.
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