Methods for producing ethylidene diacetate using catalysts suppo

Details Methods for producing ethylidene diacetate using catalysts suppo Methods for producing ethylidene diacetate using catalysts suppo

1993-07-19

1994-12-06

Prescott, Arthur C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C07C 6736

Patent

active

053712749

ABSTRACT:
The present invention relates to the field of catalyst technology, and more particularly to the preparation of a supported catalyst and a method of producing ethylidene diacetate using that supported catalyst. The catalyst is represented by the formula M.sub.a X. Compound M includes a group VIII transition metal which catalyzes the formation of ethylidene diacetate, preferably a compound of rhodium or palladium. Carrier X is an organic carrier, preferably selected from the divinylbenzene-polystyrene copolymers, most preferably copolymers having about 1-20% crosslinking. The weight percent of metal M contained in the catalyst is represented by the latter a. The supported heterogenized catalyst results from covalent bonding of the transition metal compound to the organic polymer carrier. Ethylidene diacetate was produced by reacting methyl acetate, iodomethane, carbon monoxide and hydrogen in the presence of this supported catalyst and an accelerator at elevated temperature and pressure. According to the present invention, the reaction product, ethylidene diacetate, is easily separated from the catalyst. The produced ethylidene diacetate may be used as a starting material for preparing vinyl acetate monomer.

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