| 摘要 |
1,263,502. Dehydrogenation catalysts. DOW CHEMICAL CO. 20 Feb., 1969, No. 9166/69. Heading B1E. [Also in Divisions C1 and C5] Hydrocarbon dehydrogenation catalysts comprise crystalline strontium nickel phosphate and, optionally as promoter, chromic oxide in an amount which may constitute from 0.2 to 10 per cent by weight of the catalyst which may be in particulate form, for example in the form of pellets which may have been formed with the aid of a fugitive oxidazable binding lubricant, for example graphite or a hydrocarbon oil. The Specification makes reference to various strontium nickel phosphates which are identified by reference to X-ray diffraction data and which are designated as #-strontium nickel phosphate, acidic strontium nickel phosphate, α-strontium nickel acid phosphate and strontium nickel pyrophosphate; details are given of the preparation of such phosphates from strontium-containing compounds, nickelcontaining compounds and phosphorus-containing compounds by methods which generally would appear to be conventional. After use in hydrocarbon dehydrogenation, the catalyst may be regenerated, to remove coke therefrom, by contact with a mixture of air and steam. Reference is made to various U.S. Patent Specifications which relate to calcium nickel phosphates and to the use thereof as catalysts in processes for the dehydrogenation of hydrocarbons. |
