公开(公告)号：NZ270546A

公开(公告)日：1996-12-20

申请号：NZ27054695

申请日：1995-02-22

Applicant: STANDARD OIL CO OHIO

Inventor： BLUM PATRICIA RAE ,  CIRJAK LARRY MICHAEL ,  LEMANSKI MICHAEL FRANCIS ,  PAPARIZOS CHRISTOS ,  PEPERA MARC ANTHONY ,  DEVASIRVATHAM DHANARAH SURESH

IPC: B01J21/08 ,  B01J23/44 ,  B01J23/52 ,  B01J23/56 ,  B01J23/58 ,  B01J23/60 ,  B01J23/62 ,  B01J23/63 ,  B01J23/644 ,  B01J23/648 ,  B01J23/66 ,  B01J23/68 ,  B01J32/00 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  B01J37/04 ,  C07B61/00 ,  C07C67/04 ,  C07C67/055 ,  C07C69/15 ,  B01J35/08

Abstract: A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a halide-free metal salt of Pd and M, wherein M comprises Ba, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one halide-free alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 100 microns, preferably below 60 microns. The pore volume of these particles is from 0.2 to 0.7cm /g and the surface area is from 100 to 200 m /g.