| 摘要 |
1,195,248. Oligomerizing olefins. NORWAY, CENTRAL INSTITUTE FOR INDUSTRIAL RESEARCH. 18 Sept., 1967 [24 Sept., 1966], No. 42466/67. Heading C5E. C 4-30 mono-olefins are obtained by oligomerizing or co-oligomerizing C 2-15 mono-olefins in the presence of a catalyst system comprising: (1) One or more compounds of formula M<SP>0</SP>L n or M<SP>1</SP>XL m , where M‹ and M<SP>1</SP> are Group VIII metals in zero-valent or mono-valent state respectively, X is an acid equivalent or a negatively charged organic residue, the L groups are the same or different neutral groups selected from CO, NO and mono-, bi- or polyfunctional ligands co-ordinately bonded to the metal, n is an integer from 1 to 6 and m is an integer from 1 to 5; and (2) a Lewis acid which is a compound of a Group IIa or IIIa metal (Mendeleev). The catalyst system may additionally contain (3) a Lewis base which is a compound of a Group Vb or VIb element, and which may be present as an addition compound with one of the other catalyst components. The Lewis acid is suitably of the type where R is H or a C 1-20 aliphatic or aromatic hydrocarbon residue, Y is a monobasic acid residue, a is 1-2 and b is 0-2. Many such catalyst systems are given in examples illustrating the oligomerization of ethylene and propylene and the co-oligomerization of ethylene/propylene and ethylene/butene-2. The products are mixtures of mainly beta- and gamma-olefins in which dimers predominate. |
