Methods for preparing ethylidene diacetate

Details Methods for preparing ethylidene diacetate Methods for preparing ethylidene diacetate

1993-07-23

1994-12-06

Prescott, Arthur C.

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

Organic compounds

Carboxylic acid esters

C07C 6736

Patent

active

053712757

ABSTRACT:
The present invention relates to a process for preparing a catalyst useful in producing ethylidene diacetate and to a process for producing ethylidene diacetate by a continuous process using the catalyst prepared. In the preparation of ethylidene diacetate from carbon monoxide and hydrogen, the conventional preparation method using a homogeneous catalyst system comprising a transition metal catalyst is hampered by difficulty in separating the catalyst from the reaction product after completion of the reaction. The catalyst of the present invention is separated easily from the reaction product. The heterogeneous catalyst of the present invention is prepared by adding a compound of a group VIII metal, preferably rhodium or palladium, to a carrier, preferably .alpha.-alumina, kieselguhr or silica, together with an accelerator containing phosphorus or nitrogen, preferably triphenylphosphine. Using the improved catalyst of the present invention also resulted in increased yield of product over conventional methods. The ethylidene diacetate produced using the present method is useful as a starting material for the production of vinyl acetate monomer.

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Rideal, Concepts in Catalysis, 1968, Pub. by Academic Press, New York, N.Y., pp. 4-5.

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