Method for preparing catalysts
Abstract
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.
Inventors
- 👤 Kiyoshi Morikawa
- 👤 Etsuro Echigoya
- 👤 Takayasu Shirasaki
- 👤 Itsuo Furuoya
Bibliographic Details
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