Chemistry of inorganic compounds – Halogen or compound thereof – Hydrogen halide
Patent
1983-02-28
1984-11-27
Thomas, Earl C.
Chemistry of inorganic compounds
Halogen or compound thereof
Hydrogen halide
423240, C01B 701
Patent
active
044850816
ABSTRACT:
Oxidation of chlorinated hydrocarbons ("CHC") is effected in a fluidized bed of alumina catalyst-support on which is deposited a "soft" metal as the active catalytic ingredient, and the bed is fluidized with a nitrogen-free oxygen-containing stream of HCl gas, in conjunction with steam. The steam, in a particular range of proportions relative to the HCl, stifles the production of free Cl without blinding the active catalyst sites so that conversion of the CHCs is always at least 95%. The process comprises contacting the CHCs in the vapor phase with a fluidized bed of a catalyst-support on which is deposited an effective amount of iron, or copper, or both, in an active form, sufficient to convert in excess of 95% of the CHC on a molar basis, and the bed is fluidized with HCl, superheated steam and oxygen substantially free of nitrogen.
In a particular embodiment using a single ("catoxid") reactor, the effluent is purged of water, unconverted CHCs, CO.sub.2 and some HCl, and the remaining predominantly HCl stream is recycled to the catoxid reactor. In another embodiment of the invention, the effluent from the catoxid reactor is fed to a second ("oxy") reactor to recover the HCl values by reaction with ethylene, air and HCl to produce 1,2-dichloroethane; the effluent from the catoxid reactor helps to fluidize the catalyst in the oxy reactor.
REFERENCES:
patent: 3453073 (1969-07-01), Sims
patent: 3845191 (1974-10-01), Bruce, Jr.
Csontos Alan A.
Lobo Alfred D.
Russel Jeffrey E.
The B. F. Goodrich Company
Thomas Earl C.
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