| 摘要 |
A catalyst composition and a process for producing olefins is disclosed. The catalyst composition is the reaction product between a) the product obtained by reacting a support which consists of activated silica, in a liquid alkane with an organometallic compound having the formula MR1R2R3, wherein M is a metal in groups I and III of the Periodic Table, R1 is Cl, Br, I or an alkyl group having 1-12 carbon atoms, R2 and R3 independently of each other are selected among H, Cl, Br, I, alkyl groups having 1-12 carbon atoms, and alkoxy groups having 1-12 carbon atoms; and b) a chlorinated oxygen-containing vanadium compound. The catalyst composition is characterized in that the chlorinated oxygen-containing vanadium compound is the reaction product between vanadium pentoxide and a chlorinating agent selected among i) AlCl3, TiCl4, ZrCl4, SbCl5, SbOCl3, SnCl4, PCl5 and POCl3; ii) COCl2, (COCl)2, SOCl2, SO2Cl, C6H5COCl, CnH2n+1COCl wherein n = 1-12; and iii) hexachloropropylene and benzotrichloride. In the process, olefin monomers are contacted with the catalyst composition and allowed to react under polymerisation conditions. |
