| 摘要 |
1,131,146. Oligomerizing olefins. IMPERIAL CHEMICAL INDUSTRIES Ltd. 16 May, 1967 [23 May, 1966; 21 Dec., 1966], Nos. 22869/66 and 57122/66. Heading C5E. Monoalkenes are oligomerized by contacting the monomer with a carbonyl-free catalyst formed from a Group VIII metal compound, a ligand containing a donor atom or atoms of Group V B and a Lewis acid. Preferably the Group VIII metal compound and the ligand form a complex in which at least one of the coordination sites of the metal is occupied by a ligand containing a donor atom or atoms of Group V B linked directly to the metal and at least one other of the said sites is occupied by an anionic ligand. The Group VIII metal complex may be pre-formed and used in admixture with the Lewis acid compound. Examples of suitable complexes are: (PBu) 3 - NiCl 2 , (PCy 3 ) 2 NiBr 2 , (P# 3 ) 2 NiI 2 , (P# 3 ) 2 Ni(NCS) 2 , (P# 3 ) 2 Ni(NO)Br, (PEt 3 )Ni(NCS) 2 , (PMe 3 ) 2 NiCl 2 , (# 2 PCH 2 P# 2 )NiBr 2 ,[# 2 P(CH 2 ) 2 P# 2 ]NiBr 2 ,(PBu 3 ) 2 COCl 2 . The Lewis acid may be a halide or organohalide of aluminium. The monomer may be ethylene, propene, but-1-ene, but-2-ene or a mixture thereof. The oligomerization may be carried out in a solvent, e.g. chlorobenzene, at- 25‹ to 100‹ C. and 1-50 atmospheres pressure. |
