Stauffer Chemical Company

Ramsey G Campbell

Elliott P Doane

M Henry Heines

Joseph S Naworski

Harvey J Vogt

William M Burks, Jr

Vincent C Martines

Allyn J Ziegenhagen

Wendell E Knoshaug

Emilio S Velez

Iron, such as ferric chloride, and other metallic impurities, contained in liquid chlorinated hydrocarbon waste streams, is removed by treatment of such streams with dilute aqueous mineral acid.

Process for treating liquid chlorinated hydrocarbon wastes containing

Method of producing ethylene dichloride characterized by reaction of ethylene and chlorine in a reaction zone containing a circulating medium and maintained below the vaporization point of the medium, and utilization of the heat from the reaction to vaporize and rectify a portion of the circulating medium in another zone to recover the product.

Process for preparing ethylene dichloride

In a process for production of 1,2-dichloroethane by reaction of chlorine and ethylene at temperatures between about 85.degree. C. and about 160.degree. C. conducted in the presence of a liquid medium in which a recycle stream of 1,2-dichloroethane containing chloroprene and optionally other incompletely chlorinated C.sub.4 hydrocarbons is introduced into the chlorination reaction system, the improvement comprising subjecting the recycle 1,2-dichloroethane to controlled chlorination by contacting it with a chlorination agent in such a manner and under such conditions as to partially chlorinate the chloroprene contained therein to produce a chlorinated derivative thereof, fractionating the thus treated 1,2-dichloroethane to separate chlorinated derivates of chloroprene therefrom, and introducing the thus purified 1,2-dichloroethane recycle into the chlorination reactor.

Production of 1,2-dichloroethane with purification of dichloroethane

Oxychlorination of ethylene is carried out using a three-reactor system containing beds of a catalyst comprising a spherical, high-surface area activated alumina impregnated with cupric chloride and potassium chloride. In the first two reactors, the catalyst bed is divided into two sections, with a more active catalyst in the lower section than in the upper. The catalyst is substantially undiluted with inert particles. A new catalyst for such a process is also provided.

Oxychlorination of ethylene

Radioactive lead and polonium can be removed from tobacco by treating uncured tobacco leaves with a dilute acid solution. The solution can also contain hydrogen peroxide and/or a wetting agent.

Removal of radioactive lead and polonium from tobacco

A method for improving the yield of perchloromethyl mercaptan by including with the reaction mixture phosphates or phosphites in amounts effective to suppress the formation of undesirable byproducts, such as carbon tetrachloride and sulfur monochloride.

Production of perchloromethyl mercaptan

Ferric chloride is removed from gas streams containing the same by passing the stream through a bed of activated alumina impregnated with potassium chloride or sodium chloride.

Purification of gas streams containing ferric chloride

An improvement in a process for recovering residual amounts of ethylene in ethylene chlorination effluents is disclosed, whereby ureacted chlorine is virtually eliminated. Elimination of the chlorine is accomplished by reacting it with the clorinated hydrocarbons in the stream over a novel ferric chloride catalyst mixture.

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Berkeley, CA, United States of America

Ramsey G Campbell