Supported catalyst for olefinic polymerization, and preparation and use thereof

Abstract

The invention relates to a preparation method of an olefin polymerization catalyst, components thereof and an application thereof used in olefin polymerization. The bulk phase components of a loading catalyst used for olefin polymerization comprise: 1 percent to 10 percent of Ti, 5 percent to 30 percent of Mg, 45 percent to 85 percent of Cl, 5 percent to 45 percent of C, 1 percent to 10 percent of H and 0 percent to 5 percent of N; and surface atom components comprise 5 percent to 40 percent of O, 1 percent to 8 percent of Ti, 0 percent to 4 percent of N, 50 percent to 90 percent of C and 0.5 percent to 10 percent of Mg. The olefin polymerization catalyst is prepared by the following steps: a. MgCl2 / TiCl4 adduct is prepared; b. the MgCl2 / TiCl4 adduct is used for carrying out solid-state-reaction with anion organic ligand L-ER3, the anion organic ligand L-ER3 dissolved in an organic solvent is mixed with an organic solvent suspension of the MgCl2 / TiCl4 adduct, heated, deposited after reaction, filtered to get rid of upper liquid, washed and dried so as to obtain the polymerization catalyst applied to the olefin polymerization. The catalyst prepared by the method shows very high activity to the olefin polymerization under the activation of aluminum alkyl.

Description

technical field [0001] The present invention relates to the preparation method and component of olefin polymerization catalyst, as well as the application for olefin polymerization, and the resulting polymer. technical background [0002] The traditional preparation method of supported olefin polymerization catalyst uses spherical magnesium chloride carrier to carry out multiple times of titanium loading in the presence of a neutral electron donor such as diester or diether, and the prepared catalyst shows good polymerization activity and stereoselectivity. It can be seen that the organic components in the catalyst have a decisive influence on the performance of the catalyst. In recent years, great progress has been made in homogeneous polyolefin catalysts, such as metallocene catalysts and non-polymerocene catalysts. In addition to showing ultrahigh activity and excellent stereoselectivity, these homogeneous catalysts can also effectively control the microstructure of the ...

AI Technical Summary

Problems solved by technology

The disadvantage of homogeneous catalysts is that they cannot effectively control the morphology of the polymer and need to use more expensive methylalumoxane (MAO) or modified methylalumoxane (MMAO) as a cocatalyst

Although a large number of studies have been used to realize the support of homogeneous catalysts, such as the use of silica gel and Al 2 o 3 and other supports, using the residual hydroxyl groups on the surface of these supports to react with metal-organic compounds (homogeneous catalysts), or first loading ligands on the surface of silica gel, and then reacting with metal alkyl compounds to produce supported catalysts, in addition to the more complicated loading process , it is still necessary to use MAO as a cocatalyst, and the activity of the catalyst is greatly reduced

In addition, the stereoselectivity of the supported catalysts is not as good as that of the original homogeneous system

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