Chemistry of inorganic compounds – Halogen or compound thereof – Elemental halogen
Patent
1976-06-18
1978-02-14
Stern, Edward
Chemistry of inorganic compounds
Halogen or compound thereof
Elemental halogen
423636, C01B 703, C01F 502
Patent
active
040738752
ABSTRACT:
The present invention relates to the production of chlorine and magnesium oxide. According to the process substantially anhydrous magnesium chloride, containing at least 95% MgCl.sub.2, is admixed with particulate magnesium oxide and contacted with gas comprising oxygen at a temperature from about 700.degree. C. to about 1100.degree. C. One of the advantages of the process according to the present invention is to utilize the exothermicity of the oxidation of the molten magnesium chloride, the reaction being self-sustained. According to a preferred embodiment, the particulate magnesium oxide is preheated at a temperature of above 720.degree. C. before it is admixed with the molten magnesium chloride and serves as the heat transfer agent for the subsequent oxidation of the magnesium chloride.
The process may be carried out in a stack reactor or in a fluidized bed reactor. The oxidation is effected with substantially dry, pure oxygen or air.
The magnesium oxide obtained in the oxidation reaction may be recycled to be utilized as a support for the magnesium chloride oxidation.
The process of the present invention can be conducted either batchwise or continuously.
REFERENCES:
patent: 292742 (1943-07-01), Beck et al.
patent: 393258 (1943-07-01), Beck et al.
patent: 2413292 (1946-12-01), Christensen
patent: 3067006 (1962-12-01), Ebert et al.
patent: 3516785 (1970-06-01), Smith
patent: 3607017 (1971-09-01), Lloyd
patent: 3953574 (1976-04-01), Toomey
Hackh's Chemical Dictionary, 4th Ed., 1969, by Julius Grant, pp. 401 and 402, McGraw-Hill Book Co., N.Y.
Israel Chemicals Ltd.
Roberts, Jr. John S.
Stern Edward
Yissum Research Development Co. of the Hebrew Univ.
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