| 摘要 |
Conjugated diolefins are trimerized in the presence of a catalyst comprising a complex of a titanium halide and a primary aliphatic or cycloaliphatic amine having at least 4 C and a complex of a hydrocarbyl aluminium dihalide and an ether or heterocyclic compound. Trimerization may be effected in an inert solvent, e.g. benzene, at from 50-100 DEG C., e.g. in an autoclave. Examples described the trimerization of 1:3-butadiene to yield 1:5:9-cyclododecatriene and isoprene to yield 1:5:9-trimethyl-1:5:9-cyclododecatriene.ALSO:A catalyst system comprises a complex of a titanium halide and a primary aliphatic or cycloaliphatic amine having at least 4C and a complex of a hydrocarbyl aluminium dihalide and an ether or heterocyclic compound. Specified titanium halides are TiCl3, TiCl4, TiBr4 and TiI4. Specified primarily amines are n-hexylamine, nonylamine, 5:5 dimethyl-hexylamine, 3:5:5 trimethylhexylamine, D phonyl-butylamine. Specified ethers are diethyl ether, dipropyl ether, methyl propyl ether, and specified heterocyclics are pyrndine, iso-quinoline, furan and thiophene. Examples are given. |
