| 摘要 |
1,164,855. Oligomerizing olefins. IMPERIAL CHEMICAL INDUSTRIES Ltd. 19 Aug., 1968 [4 Sept., 1967], No. 40242/67. Addition to 1,131,146. Heading C5E. Monoalkenes are oligomerized by contacting the monomer with a catalyst formed from (1) a nickel compound, (2) a substituted halophosphine of the formula PXR 2 or PX 2 R where X is halogen and R is a hydrocarbyl group, and (3) a Lewis acid. The Ni compound preferably contains at least one anionic ligand e.g. napthenate, acetylacetonate or halide. The halophosphine may be Ph 2 ClP or PhCl 2 P. The Lewis acid may be an aluminium trihalide, alkyl halide or trialkyl. Instead of compounds (1) and (2) a complex of nickel containing one or more halophosphine ligands may be used e.g. NiCl 2 (PCl- Ph 2 ) 2 or Ni(napthenate)2(PClPh 2 ) 2 . The oligomerization may be carried out in a solvent, e.g. chlorobenzene, at -25 to 200‹ C. and 1-300 atmospheres pressure. Examples describe the co-dimerization of butene and propene and the dimerization of propene. |
