| 摘要 |
1483158 Trimerisation catalysts E I DU PONT DE NEMOURS & CO 10 July 1975 [11 July 1974] 29063/75 Heading B1E [Also in Division C5] A catalyst system is formed by combining (a) an aluminium component of the formula where Z is C 2 -C 4 alkyl or phenyl (b) TiA 4 where A is Cl, Br, I or OR, R being a C 1 -C 20 organic radical, and (c) an iodine-containing component selected from Z( 2À5-3À5 )Al 2 I( 3À5-2À5 ) Z 2 AlI, ZAlI 2 and I 2 , the molar ratio of (c) to (a) being 0.05:10 to 5:10. The catalyst system may also contain a promoter selected from water, oxygen and oxygen-containing organic compounds. |
