Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1995-12-28
1998-05-12
Clardy, S. Mark
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570243, C07C 17154, C07C 17156
Patent
active
057508127
ABSTRACT:
An improved process is disclosed for manufacturing chlorinated hydrocarbon by way of a once-through air-based oxychlorination process which yields reduced levels of environmental toxins such as chlorobenzenes, polychlorinated biphenyls, polychlorinated dibenzodioxins and polychlorinated dibenzofurans. The process involves fixed bed or fluid bed catalyzed oxychlorination of a hydrocarbon reactant containing from 1 to 3 carbon atoms. The oxychlorination process consists of contacting the hydrocarbon reactant with air or oxygen enriched air and hydrogen chloride in the presence of the oxychlorination catalyst in a heated reaction zone operated at from 150.degree. C. to 600.degree. C. and recovering chlorinated hydrocarbon from the effluents of the reaction zone. The improvement consists of the use of air which is pretreated before use in the operated oxychlorination process by a means for removal of the aromatic hydrocarbons.
REFERENCES:
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Effect of Temperature, Carrier Gas and Precursor Structure on PCDD and PCDF formed from precursors by Catalytic Activity of MSW Incinerator Fly Ash, Ross, et al., Chemosphere, vol. 19 Nos. 1-6, pp. 291-298, (1989).
Formation of PCDFs, PCDDs and Related Compounds by Oxychloringation of Ethane, Evers, MTC Publication No. MTC89EE, (1989). English Translation from Dutch.
Cowfer Joseph Allen
Johnston Victor James
Popiel Lawrence
Clardy S. Mark
Powell Joe A.
The Geon Company
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