| 主权项 |
1. A process for producing a supported nonmetallocene catalyst, comprising the steps of: dissolving a magnesium compound in a first solvent in the presence of an alcohol, to obtain a magnesium compound solution; mixing a porous carrier with the magnesium compound solution to obtain a first slurry, and drying the first slurry, or introducing into the first slurry a precipitating agent, to obtain a Mg-containing carrier, OR drying the magnesium compound solution, or introducing into the magnesium compound solution a precipitating agent, to obtain a Mg-containing carrier; contacting the Mg-containing carrier with a silicon compound represented by the following formula (X) and a chemical treating agent selected from the group consisting of a Group IVB metal compound, to obtain a modified Mg-containing carrier;
Si(OR)mX4-m (X) wherein Rs may be identical to or different from one another, each independently selected from a C1-C8 straight chain or branched alkyl, preferably selected from a C1-C4 straight chain or branched alkyl, more preferably ethyl, m is 0, 1, 2, 3, or 4, Xs may be identical to or different from one another, each independently selected from a halogen atom, preferably Cl, and, contacting the modified Mg-containing carrier with a nonmetallocene complex in the presence of a second solvent, to obtain the supported nonmetallocene catalyst, optionally further comprising the step of pre-contacting the Mg-containing carrier with an assistant chemical treating agent selected from the group consisting of an aluminoxane, an alkylaluminum and any combination thereof, before contacting the Mg-containing carrier with the silicon compound and the chemical treating agent. |
