| 摘要 |
The present invention relates to a process for preparing a catalyst support comprising a layered double hydroxide (LDH), the process comprising, a) providing a water-wet layered double hydroxide of formula: [Formula should be inserted here] wherein M and M' are,metal cations, z = 1 or 2; y = 3 or 4, x is 0.1 to 1, preferably x<1, more preferably x=0.1 - 0.9, b is 0 to 10, X is an anion, r is 1 to 3, n is the charge on the anion and a is determined by x, y and z, preferably a = z(1-x)+xy-2 b) maintaining the layered double hydroxide water-wet, c) contacting the water- wet layered double hydroxide with at least one solvent, the solvent being miscible with water and preferably having a solvent polarity (P') in the range 3.8 to 9, and d) thermally treating the material to produce a catalyst support, a process for producing a solid catalyst, a polymerization catalyst as well as the use of an olefin polymerization catalyst in a polymerization process. |
