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公开(公告)号：US3806469A
公开(公告)日：1974-04-23
申请号：US27296872
申请日：1972-07-18
Applicant: NIPPON STEEL CHEMICAL CO
IPC: B01J27/055 , C07C46/04 , B01J11/82
CPC classification number: B01J27/055 , C07C46/04 , C07C50/12
Abstract: A NEW CATALYST COMPOSITION USEFUL FOR THE VAPOR PHASE OXIDATION OF NAPHTHALENE TO NAPHTHOQUINONE, HAS BEEN FOUND, SAID CATALYST COMPOSITION COMPRISING SILICON OXIDE, VANADIUM PENTOXIDE AND POTASSIUM SULFATE IN COMBINATION WITH 30 TO 300% BY WEIGHT, BASED ON THE WEIGHT OF THE VANADIUM PENTOXIDE, OF A BORON COMPOUND AS B2O3. THE CHARACTERISTIC FEATURE OF THIS COMPOSITIONS IS TO INCLUDE THE BORON COMPOUND TOGETHER WITH THE SILICON OXIDE. THE TECHNICAL ADVANTAGES OBTAINED THEREBY INCLUDE EXCELLENT SELECTIVITY FOR DESIRED REACTION AND GOOD SERVICE LIFE OVER A LONG RUN OPERATION.
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