Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal
Patent
1977-11-03
1979-02-20
Hearn, Brian
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ivb metal
423469, 423493, 423500, 423568, 423571, 423633, 260544K, 260654R, 260659R, 260664, C01G 4906, C01B 1745, C01B 3128, C07C 1906
Patent
active
041407466
ABSTRACT:
The invention relates to the recovery of chlorine values from iron chloride by-produced from the chlorination of a titaniferous material containing more than 5% by weight iron oxide, and particularly from the carbo-chlorination of ilmenite, which, for example, can be the first stage in the so-called chloride route to form titanium dioxide pigment.
The iron chloride which may be ferric chloride or ferrous chloride is subjected to a combination of reduction and oxidation reactions. In the reduction reaction, ferric chloride is dechlorinated to ferrous chloride by a reducing agent suitable for producing a chloride compound for recycle to the chlorination process or for sale and in the oxidation reaction ferrous chloride is oxidized to ferric oxide and ferric chloride, the ferric chloride being recycled to the reduction reaction. By this method the chlorine values are recovered from by-product iron chloride by a route which avoids the difficult reaction between ferric chloride and oxygen to produce chlorine and ferric oxide.
REFERENCES:
patent: 2245076 (1941-06-01), Muskat et al.
patent: 2642339 (1953-06-01), Sawyer
patent: 2852339 (1958-09-01), Hill
patent: 3562321 (1971-02-01), Borkowski et al.
Shackleton Charles E. E.
Turner John H. W.
Hearn Brian
Liberman William R.
Mineral Process Licensing Corporation B.V.
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