| 摘要 |
<p>1374460 Olefin oxidation catalyst NIPPON KAYAKU KK 30 Dec 1971 [26 May 1971] 03671/74 Divided out of 1374459 Heading B1E Olefin oxidation catalyst comprises (i) a composition having the empirical formula Ni a Co b Fe c Bi d Q e M h Mo f O g wherein M is at least one element selected from potassium, rubidium and caesium, Q is at least one element selected from titanium, tin, chromium and manganese, a is 0-6, b is 0-20, c is 0.5-8, d is 0.1-7, e is less than 3 but is not zero, f is 12, g is 36-90 and h is not greater than 0.5 but is not zero and, optionally, (ii) carrier material, for example selected from alumina, silica and silicon carbide. The catalyst, which may be in the form of grain, powder or pellets, may be prepared by a generally conventional procedure which involves co-precipitation, optionally in the presence of carrier material or precursor therefor, and subsequent calcination in a stream of air or oxygen. Specified catalysts comprise silica carrier material and a composition which contains cobalt, iron, bismuth, chromium, potassuim and molybdenum.</p> |
