公开(公告)号：MY124824A

公开(公告)日：2006-07-31

申请号：MYPI20010936

申请日：2001-03-01

Applicant: BASF AG

Inventor： DR ANDREAS TENTEN ,  DR JENS WEIGUNY ,  DR SEBASTIAN STORCK

IPC: C07C51/215 ,  B01J27/198 ,  C07D307/60 ,  B01J35/00 ,  B01J35/02 ,  C07B61/00 ,  C07C51/25 ,  C07C57/145

Abstract: A CATALYST USED IN A PROCESS FOR PREPARING MALEIC ANHYDRIDE BY HETEROGENEOUSLY CATALYZED GAS-PHASE OXIDATION OF A HYDROCARBON HAVING AT LEAST FOUR CARBON ATOMS MEANS OF OXYGEN-CONTAINING GASES COMPRISES A CATALYTICALLY ACTIVE COMPOSITION COMPRISING VANADIUM, PHOSPHORUS AND OXYGEN AND HAS A ESSENTIALLY HOLLOW CYLINDRICAL STRUCTURE IN WICH (A) THE RATIO OF THE HEIGHT H TO THE DIAMETER OF THE CONTINUOUS HOLE D? IS NOT MORE THAN 1.5 AND (B) THE RATIO OF THE GEOMATRIC SURFACE AREA AGEO TO THE GEOMATRIC VOLUME VGEO IS AT LEAST 2 MM??.