B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/38 (2006.01) B01J 23/44 (2006.01) B01J 23/52 (2006.01) B01J 23/54 (2006.01) B01J 23/58 (2006.01) B01J 23/60 (2006.01) B01J 37/02 (2006.01) C07C 67/055 (2006.01) C07C 69/15 (2006.01)
Patent
CA 2071699
? HOE 91/F 188 Abstract of the disclosure: Carrier catalyst, process for its preparation, and its use for the preparation of vinyl acetate The invention relates to a process for the preparation of a catalyst which contains palladium and/or compounds thereof and alkali metal compounds, and additionally cadmium compounds and/or gold and/or compounds thereof, on support particles which have been pressed from SiO2 or an iO2-Al203 mixture with the aid of a binder which comprises a) washing the roasted support particles with an acid which does not react with SiO2 or SiO2-Al2O3 mixtures, until no further cations of the binder employed during pressing of the support particles are released from the support particles; b) then impregnating the support particles with palladium, and gold or cadmium; c) then bringing the impregnated support particles into contact with a solution of a base at least until the thickness of the nobel metal shell generated in this way on the support particles no longer changes substantially; and d) then impregnating the support particles with an alkali metal compound. A shell-like distribution of the palladium and if appropriate of the gold in the support particles is generated in this manner. Furthermore, the invention relates to a catalyst prepared in this way and to its use for the preparation of vinyl acetate.
Eichler Klaus
Nicolau Ioan
Roscher Guenter
Wirtz Peter
Woerner Karl-Fred
Celanese Gmbh
Fetherstonhaugh & Co.
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