Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1992-10-14
1994-07-26
Sneed, Helen M. S.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502330, 502439, 502300, 502240, B01J 3703, B01J 2108, B01J 2344, B01J 2352
Patent
active
053327101
ABSTRACT:
A method of preparing a catalyst particularly useful in the reaction of ethylene, oxygen and acetic acid in the vapor phase to form vinyl acetate comprises impregnating a porous support with water soluble salts of palladium and gold, fixing the palladium and gold on the support as water insoluble compounds by immersing the impregnated support in a reactive solution and tumbling the impregnated support in the reactive solution for at least 1/2 hour to begin precipitation of the insoluble compounds and completing precipitation of the insoluble compounds on the support and reducing the insoluble compounds to free palladium and gold. The catalysts prepared in this manner have been shown to provide improvement with respect to reduced selectivity to CO.sub.2 during the vinyl acetate forming reaction.
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Davidson, J. M. et al "Selectivity Problems and Kinetic Models in the Palladium Catalysed Oxidation of Ethene and Acetic Acid to Ethenyl Acetate. Related Reactions of Propene, 1-Butene and 1-Hexene." Front. Chem. React. Eng. [Proc.-Int. Chem. React. Eng. Conf.] vol. 1, 300-313. Wiley, N.Y. 1984.
Colling Philip M.
Johnson Leland R.
Nicolau Ioan
Cassady Donald R.
Frenkel Stuart D.
Hoechst Celanese Corporation
McGinty Douglas J.
Sneed Helen M. S.
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