| 摘要 |
<p>An olefin polymerisation catalyst obtainable by depositing on a dry inorganic oxide a bimetallic chromium-containing organometallic complex representable by the general formula; <CHEM> in which the R groups are C1 to C6 hydrocarbyl groups; H is hydrogen; a and b are individually 0 or an integer from 1 to 5, the sum of a + b being equal to 5; M is Ti, Zr, Hf, V, Cr, Fe, Nb, Mn, Ni, or Co; L and L' are ligands which are C1 to C12 hydrocarbyl or carbonyl ligands; x is an integer from 1 to 3 depending on the available co-ordination sites on the chromium atom; y is an integer from 1 to 5 depending on the available co-ordination sites on the metal M and A is a metal-metal bond, an ionic bond or at least one carbonyl bridging group. Embodiments include binuclear chromium complexes and complex salts. Also disclosed is a process for polymerising olefins using the catalysts.</p> |
