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Solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization catalysts, can solve the problems of unsatisfactory performance of catalytically active polymers, achieve excellent comprehensive performance, high tacticity, and improve polymerization activity

Active Publication Date: 2018-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN102212154A reports a kind of 1,2-cyclohexanedicarboxylate compound is used for olefin polymerization, but this compound is all unsatisfactory no matter in catalytic activity or in the polymer performance of making

Method used

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  • Solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization
  • Solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization
  • Solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization

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Experimental program
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Embodiment approach

[0028] According to one embodiment, the solid catalyst component comprises a reaction product of a magnesium compound, a titanium compound and the internal electron donor compound, wherein the molar ratio of the magnesium compound, the titanium compound and the internal electron donor compound can be 1:( 0.5~150): (0.02~0.5).

[0029] Wherein, the magnesium compound can be selected from magnesium dihalide, alkoxy magnesium, alkyl magnesium, hydrate or alcoholate of magnesium dihalide, and a halogen atom in the molecular formula of magnesium dihalide replaced by alkoxy or haloalkoxy At least one of the derivatives substituted by the group.

[0030] Preferably, the magnesium compound is a magnesium dihalide and / or an alcoholate of magnesium dihalide.

[0031] Further preferably, the magnesium compound is an alcoholate of magnesium dihalide.

[0032] The titanium compound may be selected from titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, tetrabutoxytitani...

Embodiment 1～5 and comparative example 1

[0065] (1) Preparation of solid catalyst component a

[0066] In the reactor fully replaced by high-purity nitrogen, add 4.8g of magnesium chloride, 95mL of toluene, 4mL of epichlorohydrin and 12.5mL of tributyl phosphate in sequence, raise the temperature to 50°C under stirring, and maintain it for 2.5h to completely dissolve the solid , Then add 1.4g of phthalic anhydride and continue to maintain for 1h. Cool the solution to below -25°C, add 56mL TiCl dropwise within 1h 4 , and then slowly raised the temperature to 80°C. During the heating process, solids were gradually precipitated, and 5 mmol of the internal electron donor compound shown in Table 1 was added, and reacted at 80°C for 1 hour. After filtering, they were washed twice with 70 mL of toluene to obtain a solid precipitate material, then add 60mL toluene and 40mLTiCl 4 , heated up to 110°C, maintained for 2h, repeated the same operation once, and then washed three times with 70mL toluene at 110°C for 10min, then ...

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Abstract

The invention provides a solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization. The solid catalyst component comprises magnesium, titanium, halogen and aninternal electron donor compound, wherein the internal electron donor compound is at least one selected from compounds as shown in a formula (I) which is described in the specification, and R1 and R2in the formula are same or different and are independently selected from a group consisting of C1-10 alkyl groups, C3-10 cycloalkyl groups, C6-20 aryl groups and C7-20 aralkyl groups. The catalyst including the solid catalyst component has improved polymerization activity when applied to olefin polymerization, and a prepared polymer has high stereo tacticity and wide molecular weight distribution.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, in particular to a solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization. Background technique [0002] It is well known that solid titanium catalyst components based on magnesium, titanium, halogen and electron donors can be used in the polymerization of ethylene and / or α-olefins, especially in α-olefins with 3 or more carbon atoms. Polymers with higher yield and higher stereoregularity can be obtained in olefin polymerization. Among them, the electron donor compound is one of the essential components in the catalyst components, and with the development of the internal electron donor compound, the polyolefin catalyst is constantly updated. At present, a large number of internal electron donor compounds have been disclosed, such as polycarboxylic acid, monocarboxylic acid ester or polycarboxylic acid ester, acid anhydride, ketone, monoet...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646C08F4/654
CPCC08F10/00C08F110/06C08F2500/04C08F2500/15C08F4/6494C08F4/6465C08F4/6543
Inventor 李昌秀高明智刘海涛蔡晓霞马吉星马晶陈建华胡建军王军
Owner CHINA PETROLEUM & CHEM CORP