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Preparation method of solid catalyst component for olefin polymerization, olefin polymerization catalyst and application thereof

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization catalysts, can solve the problems of rapid catalyst activity decay, isotacticity and hydrogen adjustment performance to be improved, and catalyst performance has a greater impact

Active Publication Date: 2020-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the catalyst prepared by this method is greatly affected by the polyol ester compound, the activity of the catalyst decays quickly, and the isotacticity and hydrogen adjustment performance need to be improved.

Method used

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

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preparation example Construction

[0023] In a first aspect, the present invention provides a method for preparing a solid catalyst component for olefin polymerization, comprising the steps of:

[0024] 1) dissolving the magnesium halide in a solvent system preferably consisting of an organic epoxy compound, an organic phosphorus compound and an inert diluent to form a solution;

[0025] 2) contacting the solution obtained in step 1) with a precipitation aid and a titanium compound to produce a mixture containing solid precipitation,

[0026] The precipitation aid includes the compound shown in formula A,

[0027]

[0028] In Formula A,

[0029] 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 10 Alkenyl, C 2 -C 10 Alkynyl, C 3 -C 8 Cycloalkyl, C 6 -C 20 Aryl, C 7 -C 20 Aralkyl, 4-12 membered heterocycloalk...

Embodiment approach

[0089] According to some embodiments of the present invention, the preparation method also includes the following steps:

[0090] 3) contacting the mixture containing solid precipitation obtained in step 2) with an internal electron donor compound to obtain a solid containing magnesium and titanium;

[0091] Optionally, 4) treating the magnesium- and titanium-containing solid obtained in step 3) with a mixture of a titanium compound and an inert diluent, and then washing with an inert diluent to obtain the solid catalyst component.

[0092] According to some embodiments of the present invention, in step 3), firstly, the temperature of the mixture containing solid precipitation is raised to 60-110°C, and the internal electron donor compound is added during the heating process or after the temperature is raised to 60-110°C, preferably the temperature is raised to After 60-110°C, the reaction is continued for 0.2-8 hours, and then solid-liquid separation is carried out, and the s...

Embodiment 1

[0148] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, add 0.05 moles of anhydrous magnesium chloride, 0.75 moles of toluene, 0.1 moles of epichlorohydrin, and 0.033 moles of tributyl phosphate in sequence. , reacted for 2 hours, added 2.5 mmoles of compound A diluted with 0.1 moles of toluene, reacted for 1 hour, cooled to -28°C, added dropwise 0.51 moles of titanium tetrachloride, continued to react for one hour, and gradually raised the temperature to 85°C. Precipitate solid particles, add 4.0 mmol DNBP, keep the temperature for one hour, filter the mother liquor, wash and filter the liquid with inert diluent toluene several times, add 0.44 moles of titanium tetrachloride, 0.7 moles of toluene, keep the temperature at 110 ° C for 2 hours, filter Repeat the treatment twice more, and then wash with hexane for 5 times, and the remaining solid product is vacuum-dried to obtain a solid titanium catalyst component.

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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 application of the olefin polymerization catalyst. The preparation method comprises the following steps: 1)dissolving magnesium halide in a solvent system, preferably a solvent system comprising an organic epoxy compound, an organic phosphorus compound and aninert diluent, to form a solution; and 2)contacting the solution obtained in the step 1)with a precipitation aid and a titanium compound to produce a mixture containing solid precipitates. Accordingto the preparation method provided by the invention, a novel catalyst with excellent particle morphology and comprehensive properties 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 system, solids with uniform particle size can be obtained only with the presence of precipitation aids. Generally, organic acid anhydrides, organic acids, ketones, ethers and other compounds are used as precipitation aids. [0003] In CN85100997A, the titanium-containing catalyst component is a homogeneous solution formed by dissolving magnesium halide in an organic epoxy compound and an orga...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F110/02C08F4/649
CPCC08F10/00C08F110/02C08F110/06C08F4/6494
Inventor 严立安黄庭赵惠郭子芳周俊领孙竹芳林洁岑为张军辉张晓帆付梅艳
Owner CHINA PETROLEUM & CHEM CORP
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