Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium
Patent
1976-01-06
1978-04-04
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iiia metal or beryllium
423137, 423341, 423343, 423 76, 423 79, 423496, 423136, C01G 1500
Patent
active
040828336
ABSTRACT:
One of the major obstacles toward the needed and economic production of alumina and other values from kaolinitic clay and other ores by chlorination has been the slow reaction rates and low yields of the metal values. The present information provides methods for improving reaction rates and/or yields in the halogenation of various ores which comprises the addition of sulfur and/or functionally equivalent sulfur containing compounds as an ore conditioning agent and/or reaction promoter. These improvements also permit operation at low temperatures with advantage of savings of energy and of equipment and maintenance costs. The invention is applicable to both displacement halogenation and carbo-halogenation processes. The sulfur and/or functionally equivalent sulfur containing compounds can be added to the reaction mass during pre-halogenation steps or to the halogenation step or to combinations of steps ordinarily with additional benefits. The preferred embodiments are directed toward the carbochlorination of ores with illustrative examples given for clay, bauxite, ilmenite and aluminum phosphate; and for displacement chlorination of ores with illustrative examples given for hematite and ilmenite.
REFERENCES:
patent: 2127240 (1938-08-01), Stott
patent: 3244509 (1966-04-01), Nowak et al.
patent: 3861904 (1975-01-01), Othmer
Chemical Abstracts, vol. 55, Nos. 14223d,f, 20346, (1961).
Terry John Christopher
Wyndham Ronald
Hearn Brian E.
Toth Aluminum Corporation
Vertiz O. R.
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