Vulcan Materials Company

Vulcan Chemicals

William Q Beard, Jr

Eric L Mainz

Barry M Little

Robert P Hirschmann

Earl B Smith

Richard L Wilson

A process for the purification of 1,1,1-trichloroethane contaminated with at least one undesirable C.sub.1 -C.sub.3 chlorocarbon, for example, 1,2-dichloroethane, 1,2-dichloroethylene and/or trichloroethylene, which process comprises contacting the impure 1,1,1-trichloroethane with a particulate adsorbent, the adsorbent being a particulate product of controlled pyrolysis of a polysulfonated macroporous crosslinked vinylaromatic polymer having a surface area of at least about 500 m.sup.2 /g, a micropore pore volume of at least about 0.24 ml/g, a macropore pore volume of less than about 0.24 ml/g and a ratio of macropore to micropore pore volume of less than 100 percent is provided.

Purification of 1,1,1,-trichloroethane

A superior catalyst for the oxychlorination of C.sub.2 hydrocarbon feeds comprises a mixture of copper chloride and alkali metal chloride, especially potassium chloride, and preferably also magnesium chloride, which mixture is deposited on an alumina support that has been thermally stabilized by integral incorporation therein of a certain class of lanthanide oxide. The use of such thermally stanle catalyst in the production of chlorinated hydrocarbons such as trichloroethylene and perchloroethylene by oxychlorination of a C.sub.2 hydrocarbon feed results in particularly good process efficiencies in terms of long on-stream times, relatively low reactor corrosion rates, high HC1 conversion, reduced burning, and convenienty flexible selectivity to specifically desired product.

Oxychlorination catalysts comprising copper chloride supported on

A superior catalyst for the oxychlorination of C.sub.2 hydrocarbon feeds comprises a mixture of copper chloride and alkali metal chloride, especially potassium chloride, and preferably also magnesium chloride, which mixture is deposited on an alumina support that has been thermally stabilized by integral incorporation therein of a certain class of lanthanide oxide. The use of such thermally stable catalyst in the production of chlorinated hydrocarbons such as trichloroethylene and perchloroethylene by oxychlorination of a C.sub.2 hydrocarbon feed results in particularly good process efficiencies in terms of long on-stream times, relatively low reactor corrosion rates, high HCl conversion, reduced burning, and conveniently flexible selectivity to specifically desired product.

Oxychlorination process using a catalyst which comprises copper chloride

A superior catalyst for the oxychlorination of C.sub.2 hydrocarbon feeds comprises a mixture of copper chloride and alkali metal chloride, for instance, potassium chloride, and preferably also magnesium chloride, which mixture is deposited on an alumina support having a surface area in excess of 20 and less than 100 m.sup.2 /g. The thermal stability of such a catalyst composition can be further improved by incorporating 0.2 to 5 percent silica in the alumina support. The use of such microspheroidal catalyst in the production of perchloroethylene and trichloroethylene by oxychlorination of a C.sub.2 hydrocarbon feed in a fluidized bed reactor results in particularly good process efficiencies in terms of high HCl conversion, and good flexible selectivity to specifically desired product, reduced burning, long on-stream times, and relatively low corrosion rates.

Manufacture of perchloroethylene and trichloroethylene by catalytic

Ferric iron is removed from chlorinated hydrocarbons having less than 6 carbon atoms per molecule by intimately contacting the latter with an oil that comprises one or more hydrocarbons having at least 6 concatenated aliphatic carbon atoms per molecule. The hydrocarbon oil is present in an amount sufficient to interact with a major portion of the ferric iron. The resulting mixture of the chlorinated hydrocarbon stream and the hydrocarbon oil is heated simultaneously with the intimate contacting, and a precipitate is allowed to form. The chlorinated hydrocarbon stream is then separated from the hydrocarbon oil and from the precipitate, and the precipitate is subsequently separated from the hydrocarbon oil, which may be recycled and re-used.

Process for separating ferric iron from chlorinated hydrocarbons

Ferric iron is removed from chlorinated hydrocarbons having less than 6 carbon atoms per molecule by intimately contacting the latter with an oil that comprises one or more hydrocarbons having at least 6 carbon atoms per molecule. The hydrocarbon oil is present in an amount sufficient to interact with a major portion of the ferric iron. The resulting mixture of the chlorinated hydrocarbon stream and the hydrocarbon oil is heated simultaneously with the intimate contacting, and a precipitate is allowed to form. The chlorinated hydrocarbon stream is then separated from the hydrocarbon oil and from the precipitate, and the precipitate is subsequently separated from the hydrocarbon oil.

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Wichita, KS, United States of America

William Q Beard, Jr