| 摘要 |
1,171,602. Cracking catalysts. IMPERIAL CHEMICAL INDUSTRIES Ltd. 21 Feb., 1967 [14 March, 1966], No. 11073/66. Heading B1E. Cracking catalysts comprise Ni or Co or one or more of the precious Group VIII metals or mixtures thereof, a refractory metal oxide support and optionally a hydraulic cement, the refractory metal oxide having been introduced during the preparation of the catalyst partly as such in a form other than a "dead-burned" form and partly by coprecipitation with a compound of the metal. Additionally the catalyst may contain W or Mo, or an alkali metal compound e.g. K 2 CO 3 . In examples annular catalysts are made which contain NiO, CaO, Al 2 O 3 , SiO 2 and small quantities of Na 2 O and K 2 O and MgO. |
