Honeycomb catalyst for vinyl acetate synthesis

Details Honeycomb catalyst for vinyl acetate synthesis Honeycomb catalyst for vinyl acetate synthesis

B - Operations, Transporting

01

J

B01J 23/52 (2006.01) B01J 21/16 (2006.01) B01J 23/44 (2006.01) B01J 23/58 (2006.01) B01J 23/66 (2006.01) B01J 35/04 (2006.01) B01J 37/02 (2006.01) C07C 67/055 (2006.01) C07C 69/15 (2006.01) B01J 21/08 (2006.01)

Patent

CA 2249229

A catalyst particularly useful in the preparation of unsaturated esters such as the reaction of ethylene, oxygen and acetic acid in a vapor phase to form vinyl acetate. The catalyst comprises a honeycomb carrier coated with silica and containing palladium and gold throughout the silica coat. Such catalysts show reduced pressure drop and a high space time yield for vinyl acetate.

Cette invention se rapporte à un catalyseur particulièrement utile dans la préparation d'esters insaturés, par exemple par la réaction d'éthylène, d'oxygène et d'acide acétique en phase vapeur, afin de former de l'acétate de vinyle. Ce catalyseur est constitué par un support en nid d'abeilles recouvert de silice et contenant du palladium et de l'or dans toute la couche de revêtement en silice. De tels catalyseurs se caractérisent par une chute de pression réduite et par un rendement espace-temps élevé pour l'acétate de vinyle.

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