公开(公告)号：US3629145A

公开(公告)日：1971-12-21

申请号：US3629145D

申请日：1968-08-15

Applicant: TAKEDA CHEMICAL INDUSTRIES LTD

Inventor： MORIKAWA KIYOSHI ,  ECHIGOYA ETSURO ,  SHIRASAKI TAKAYASU ,  FURUOYA ITSUO

IPC: B01J23/40 ,  B01J23/44 ,  B01J37/02 ,  B01J37/03 ,  B01J11/82

CPC classification number: B01J23/44 ,  B01J23/40 ,  B01J37/02 ,  B01J37/03

Abstract: A SUPPORTED PALLADIUM CATALYST OF HIGH CATALYTIC ACTIVITY AND EXCELLENT THERMAL STABILITY IS PREPARED BY CARRYING OUT AT LEAST TWICE A SERIES OF PROCESS STEPS WHICH CONSIST OF BRINGING AN AMORPHOUS SOLID ACID CARRIER (SILICA, ALUMINA, ETC.) CONTAINING ACID SITES INTO CONTACT WITH A BASIC AQUEOUS SOLUTION OF A PALLADIUM AMINE OR A PALLADIUM LOWER ALKYLAMINE COMPLEX-AND, ALTERNATIVELY, ALSO INTO CONTACT WITH AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF A 3- OR 4-VALENT METAL (ALUMINUM NITRATE, TITANIUM TETRACHLORIDE, ETC.), AND SUBJECTING THE THUS-TREATED SOLID CARRIER TO A THERMAL TREATMENT (HEATING E.G. TO 100 TO 800* C.) IF THE STARTING SOLID CARRIER HAS NO ACID SITES, AS E.G. ACTIVE CARBON, ACID SITES ARE PRODUCED BY TREATMENT WITH OXYACID. THE THUS-OBTAINED SUPPORTED PALLADIUM CATALYST IS USEFUL IN INTER ALIA THE HYDROGENATION OF A BENZENE NUCLEUS.