Solid catalyst component containing o-phenylenediamine compound, catalyst and application thereof

Abstract

The present invention provides a solid catalyst component containing an o-phenylenediamine compound, wherein the solid catalyst component contains Mg, Ti, a halogen and at least an electron donor, andthe electron donor is selected from an o-phenylenediamine compound represented by a general formula (I). The invention further discloses a catalyst containing the solid catalyst component, and applications of the catalyst in olefin polymerization reactions, particularly in propylene polymerization reactions. According to the present invention, the catalyst has high activity and good stereospecificity, the obtained polymer has broad and adjustable molecular weight distribution, and the catalyst is suitable for the production of polymers with characteristics of broad molecular weight distribution and low ash content.

Description

technical field [0001] The present invention relates to a method for CH 2 =CHR solid catalyst component for olefin polymerization, wherein R is hydrogen or a hydrocarbyl group containing 1-12 carbon atoms, more specifically, the present invention relates to a solid catalyst component containing an o-phenylenediamine compound, A catalyst containing the solid catalyst component and the use of the catalyst in olefin polymerization, especially in propylene polymerization. Background technique [0002] In the propylene polymerization industry, the most widely studied and applied catalyst is the Ziegler-Natta catalyst, which is prepared by adding an internal electron donor during the process of loading titanium on an active magnesium chloride carrier. Since internal electron donors can change the performance of catalysts to the greatest extent, the research and search for ideal internal electron donor compounds has become the focus and focus of Z-N catalyst research. At present,...

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Problems solved by technology

[0003] However, in practical applications, the above-mentioned compounds have certain problems as internal electron donors of catalysts for olefin polymerization. For example, the activity of catalysts using dibasic aromatic carboxylic acid ester compounds as internal electron donors is not high, and the prepared polypropylene (PP ) has a narrow relative molecular mass distribution, and phthalates, as commonly used plasticizers, are very harmful to human reproductive health and the environment; 1,3-diether compounds are used as internal donating electrons Although the activity of the catalyst is relatively high, and the hydrogenation sensitivity of the catalyst is also good, the relative molecular mass distribution of the prepared PP is narrow, which is not conducive to the development of different grades of PP; succinate compounds as internal electron donors have the advantage of The relative molecular mass distribution of PP is relatively wide, but the disadvantage is that the stereoregularity of PP and the hydrogen adjustment sensitivity of the catalyst need to be improved; while the overall activity of the diol ester catalytic system is not as ideal as that of the diether system

[0004] 1,3-diether compounds need to be prepared through two-step reaction, the production process is long, the production yield of succinate compounds is low, and the main raw materials of diol ester compounds such as 2,4-pentanediol are difficult to prepare. The price is higher, so the production cost of the above-mentioned electron donor compounds is higher, which is not conducive to the marketing of products

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