The Dow Chemical Company

Gordon G Willis

John B Ivy

Theodore S Boozalis

Douglas L Hunter

Stanley E Moore

Darryl E Cragar

A method of controlling metal leaching in heterogeneous catalysis conducted in the presence of a solid-supported, metal complex catalyst with liquid feed subject to inclusion of ligands competitive with the solid support for the metal complex. The method is specifically applicable where the heterogeneous catalysis reaction is a combined hydroformylation/reduction reaction producing aldehydes and alcohols from olefins.

Metal leach control from processes with polymer-supported catalysts

An improved process for production of allyl chloride which comprises (1) thermally chlorinating propylene above 300.degree. C., but below that at which substantial carbon formation is effected, (2) separating the allyl chloride from its by-products, (3) subjecting the unsaturated compounds in said by-products to a low temperature chlorination, (4) separating the 1,2-dichloropropane from the products of said low temperature chlorination, and (5) passing said 1,2-dichloropropane to a cracking furnace. The effluent from the cracking furnace can be recycled to the allyl chloride finishing system by adding it to the high temperature propylene chlorination reactor effluent. Reaction temperatures are optimized to eliminate problems caused by carbon formation in the high temperature chlorination reactor, while overall yields of allyl chloride are increased and effluents which are ecologically and economically undesirable are reduced.

Allyl chloride process

A process for preparing 1,1,1-trichloroethane from ethylene and chlorine by hydrochlorinating the ethylene in the presence of aluminum chloride in a liquid phase reaction zone followed by chlorination of the resulting reaction product and finally by hydrochlorination of the effluent from the chlorinator in the presence of ferric chloride. The principal product of this reaction is 1,1,1-trichloroethane. Numerous by-products and partially chlorinated and unsaturated chlorohydrocarbons are also produced but, in the major part, these are recyclable and produce, upon being recycled to the appropriate step, the precursors of or the desired 1,1,1-trichloroethane product.

Process for preparing 1,1,1-trichloroethane

1,1,1-Trichloroethane containing 1,2-dichloroethane as a principal contaminant is purified by extractive distillation, employing as an extraction solvent a saturated or unsaturated tertiary C.sub.4 to C.sub.7 alcohol, e.g., t-amyl alcohol, 2-methyl-3-buten-2-ol or 2-methyl-3-butyn-2-ol, or mixtures thereof, organic monocarboxylic acids and organic monocarboxylic acid anhydrides.

Growing community of inventors

Lake Jackson, TX, United States of America

Gordon G Willis