| abstract |
The invention discloses a rare earth metal organic compound and a rare earth catalyst composition and its preparation method and application, wherein, the compound has a structure shown in formula (I): wherein, M is any one of the lanthanide rare earth metal elements ; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each independently selected from hydrogen, C 1-8 alkyl, C 6-12 aryl; L is -OR 7 or -NR 8 , where x is 1, 2 or 3, and y=3-x. When the rare earth metal organic compound containing the present invention is used to form a catalyst, the obtained catalyst has the advantages of high activity, high selectivity, etc.; and can make the polymer cis content higher and Mooney viscosity higher. |