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Preparation method of solid catalyst component for olefin polymerization and olefin polymerization catalyst and use thereof

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization catalysts, can solve the problems of large titanium tetrachloride and low catalyst activity

Active Publication Date: 2021-07-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of titanium tetrachloride used in the catalyst is relatively large in the synthesis process, the catalyst activity is slightly low, and the productivity and polymerization performance of the catalyst need to be further improved.

Method used

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  • Preparation method of solid catalyst component for olefin polymerization and olefin polymerization catalyst and use thereof
  • Preparation method of solid catalyst component for olefin polymerization and olefin polymerization catalyst and use thereof
  • Preparation method of solid catalyst component for olefin polymerization and olefin polymerization catalyst and use thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] In a first aspect, the present invention provides a method for preparing a solid catalyst component for olefin polymerization, comprising the steps of:

[0023] 1) carrying out the first contact reaction with the magnesium halide and the alcohol compound in the presence of a hydrocarbon solvent to form a solution, preferably a uniform solution;

[0024] 2) In the presence of a precipitation aid, the solution obtained in step 1) is subjected to a second contact reaction with a titanium compound to obtain a mixture containing a solid precipitate,

[0025] The precipitation aid includes a precipitation aid a, wherein the precipitation aid a is selected from compounds shown in formula A,

[0026]

[0027] In Formula A,

[0028] m 1 to M 12 The same or different, each independently selected from hydrogen, hydroxy, halogen, cyano, nitro, amino, mono-C 1 -C 10 Alkylamino, bis-C 1 -C 10 Alkylamino, aldehyde, carboxyl, R a C(O)-, R a O-, C 1 -C 10 Alkyl, C 2 -C 1...

Embodiment approach

[0087] According to some embodiments of the present invention, the preparation method also includes the following steps:

[0088] 3) performing a third contact reaction with the mixture containing solid precipitation obtained in step 2) and the internal electron donor compound to obtain a solid containing magnesium and titanium;

[0089] Optionally, 4) treating the magnesium- and titanium-containing solid obtained in step 3) with a mixture of a titanium compound and an inert diluent, followed by washing with an inert diluent.

[0090] According to some embodiments of the present invention, the precipitation aid further includes at least one of the precipitation aid b and the precipitation aid c.

[0091] The precipitation aid b is selected from the alkyl esters of aliphatic carboxylic acids and the alkyl esters of aromatic carboxylic acids, and the aliphatic carboxylic acids are preferably selected from C 1 -C 8 Carboxylic acid, the aromatic carboxylic acid is preferably sel...

Embodiment 1

[0149] (1) Preparation of catalyst components

[0150] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, 52.5mmol of anhydrous magnesium chloride, 328mmol of toluene, and 140mmol of 2-ethylhexanol were sequentially added, and reacted for 3.0 hours at a stirring speed of 450rpm and a temperature of 110°C to obtain Stable and homogeneous alcoholate solution; then add the precipitation aid shown in Table 1, stir for 60 minutes, and cool to room temperature.

[0151] Add the homogeneous alcoholate solution cooled to room temperature into a reactor fully replaced by nitrogen and equipped with 1.0mol titanium tetrachloride and 190mmol toluene at -20°C, and make them fully contact at -20°C by stirring. After 5 hours, the temperature was raised to 110°C. During the heating process, a solid precipitate was precipitated, and 5.6 mmol of diisobutyl phthalate was added to react for 1 hour. After the reaction, the liquid was filtered out, and then the solid ...

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Abstract

The invention relates to a preparation method of a solid catalyst component for olefin polymerization, an olefin polymerization catalyst and applications thereof. The preparation method comprises 1) carrying out the first contact reaction of the magnesium halide and the alcohol compound in the presence of a hydrocarbon solvent to form a solution; 2) carrying out the solution obtained in step 1) with the titanium compound in the presence of a precipitation aid In the second contact reaction, a mixture containing solid precipitation is obtained, and the precipitation aid includes a compound represented by formula A. By introducing the compound represented by formula A as a precipitation aid component, a novel catalyst with excellent particle shape and comprehensive performance can be obtained.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, and in particular relates to a preparation method of a solid catalyst component for olefin polymerization, an olefin polymerization catalyst and applications thereof. Background technique [0002] The solid particle type polyolefin catalyst with magnesium, titanium, halogen and electron donor as the basic components is firstly prepared into a uniform solution of magnesium chloride, and then precipitated by crystallization and loaded with titanium-containing active components. In the dissolution and elution system, only with the presence of a precipitation aid can it be possible to obtain solids with uniform particle size. The precipitation aid generally uses organic acid anhydrides, organic acids, ketones, ethers, esters and other compounds. [0003] CN1042156A discloses a catalyst system prepared by a co-precipitation method, the Ti-containing solid catalyst component in the cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/00C08F4/654C08F4/651C08F4/649C08F4/646
CPCC08F10/00C08F110/00C08F4/6545C08F4/651C08F4/6494C08F4/6465C08F2500/15C08F2500/18C08F2500/12
Inventor 严立安黄庭林洁郭子芳周俊领孙竹芳岑为张晓帆张军辉赵惠付梅艳
Owner CHINA PETROLEUM & CHEM CORP
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