| 摘要 |
1,151,015. Dimethylbutenes; dimethylbutanes. ESSO RESEARCH & ENG. CO. 1 Aug., 1967 [1 Aug., 1966], No. 35330/67. Heading C5E. Dimethylbutenes are prepared by dimerizing propylene in the presence of a solvent and a catalyst complex comprising (1) the acetylacetonate of Co, Ni or Fe, (2) AlR n X 3-n , where R is C 1-6 alkyl, X is halogen, and n is 1-2, and (3) a phosphine of formula R 3 P, where R is an alkyl or cycloalkyl group having up to 10 carbon atoms, the product comprising at least 10 wt. per cent dimethylbutenes. The catalyst may contain a promoter, e.g. propylene or 1,5-cyclooctadiene. Suitable solvents are aliphatic and aromatic hydrocarbons and their halogenated derivatives. The product may be hydrogenated to form dimethylbutanes, suitable as gasoline components, e.g. by contact with spent dimerization catalyst, cobalt molybdate on alumina, or one or more of Ni, Co, Mo, Pt or Ce, supported on alumina, silica-alumina, bauxite, clay, kieselguhr or a molecular sieve. |
