公开(公告)号：US3843552A

公开(公告)日：1974-10-22

申请号：US17450271

申请日：1971-08-24

Applicant: PECHINEY SAINT GOBAIN

Inventor： JOUY M ,  COBLENTZ M

IPC: B01J23/22 ,  B01J37/00 ,  C07C51/265 ,  B01J11/40 ,  B01J11/82

CPC classification number: B01J37/0009 ,  B01J23/22 ,  B01J37/00 ,  C07C51/265 ,  C07C63/16

Abstract: 1. A CATALYST FOR THE PREPARATION OF PHTHALIC ANHYDRIDE BY OXIDATION OF ORTHO-XYLENE IN THE GASEOUS PHASE COMPRISING A SUPPORT IMPREGNATED WITH A SILICATE ENAMETL AND A COATING OF CATALYTICALLY ACTIVE MATERIAL ON THE ENAMELLED SUPPORT.