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 limited application range, narrow polymer molecular weight distribution, unsatisfactory toughness and processing performance, etc., and achieve improved polymerization activity, excellent comprehensive performance, instant The effect of high regularity

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

In addition, when phthalate compounds are used as internal electron donors, the molecular weight distribution of the obtained polymer is narrow, and the toughness and processability are not satisfactory, so its application range is limited.

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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Effect test

Embodiment approach

[0035] 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).

[0036] 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.

[0037] Preferably, the magnesium compound is a magnesium dihalide and / or an alcoholate of magnesium dihalide.

[0038] The titanium compound may be selected from titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, tetrabutoxytitanium, tetraethoxytitanium, monochlorotriethoxytitanium, dichlorodiethoxytitanium and At least ...

Embodiment 1～5 and comparative example 1

[0071] (1) Preparation of solid catalyst component a

[0072] 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, and raise the temperature to 50°C while stirring, and maintain it for 2.5h. The solid is completely dissolved. Add 1.4 g of phthalic anhydride and continue for 1 h. Cool the solution to below -25°C, add 56mL TiCl dropwise within 1h 4 , slowly warming up to 80°C, solids were gradually precipitated during the heating process, 5mmol of the complex internal electron donor compound in Table 1 was added, and the temperature was maintained for 1h. After filtration, they were washed twice with 70mL toluene to obtain solid precipitates. Then add 60mL toluene, 40mL TiCl 4 , the temperature was raised to 110°C and maintained for 2h, the same operation was repeated once, and then washed three times with 70mL toluene at 110°C for 10min each, then 60mL of h...

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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 internal electron donor compounds, wherein the internal electron donor compounds are composed of a first internal electron donor compound as shown in a formula (I) which is described in the specificationand a second internal electron donor compound as shown in a formula (II) which is described in the specification; R1 and R2 in the formula are independently selected from a group consisting of C1-10alkyl groups, C3-10 cycloalkyl groups, C6-20 aryl groups, C7-20 aralkyl groups and the like; R3 and R4 in the formula are independently selected from a group consisting of hydrogen, halogen and the like; R5 and R6 in the formula are independently selected from a group consisting of halogen, C1-10 alkyl groups and the like; and R7 and R8 in the formula are independently selected from a group consisting of C3-20 cycloalkyl groups and the like. The catalyst including the solid catalyst component has improved polymerization activity and allows a polymer to have good overall performance when applied to olefin polymerization.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/649C08F4/651
CPCC08F110/06C08F4/6494C08F4/651C08F2500/04
Inventor 李昌秀陈建华马吉星蔡晓霞马晶高明智刘海涛王军胡建军
Owner CHINA PETROLEUM & CHEM CORP
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