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Solid catalyst component for olefin polymerization, and preparation method and application thereof

A solid catalyst and olefin polymerization technology, which is applied in the field of solid catalyst components for olefin polymerization and its preparation and application, and can solve the problems of unfavorable production of high-performance polymers and many defects in PP molecular chains

Active Publication Date: 2015-08-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, catalysts prepared with diether compounds as internal electron donors generally have high catalytic activity, see patents CN1092670, CN1463274, CN1553921, CN1539857, EP361494, but a major disadvantage of this type of catalyst is that the resulting PP molecular chain There are many defects, which is not conducive to the production of high-performance polymers

Method used

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  • Solid catalyst component for olefin polymerization, and preparation method and application thereof
  • Solid catalyst component for olefin polymerization, and preparation method and application thereof
  • Solid catalyst component for olefin polymerization, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] (1) After fully replacing the flask with a branch tube with nitrogen, add 4.94g of anhydrous magnesium chloride, 18.9g of dried isooctyl alcohol, and 30mL of dried decane, and heat up to 130°C while stirring, and react at this temperature for 2 hours. A homogeneous mixture was obtained. Add 2.65g of tetrabutyl titanate and 1.6g of isobutyl 2-methoxybenzoate to 5ml of toluene in advance, and stir at room temperature for 0.5h to obtain a homogeneous solution. The above homogeneous solution was transferred to the above mixture, and the reaction was continued at 130° C. for 1 hour. After the reaction was completed, it was cooled to room temperature to form a stable and uniform alcoholate solution. Seal all joints with parafilm and place in a desiccator overnight.

[0077] (2) Add the homogeneous alcoholate solution prepared above dropwise into a reactor fully replaced by nitrogen and equipped with 250ml of titanium tetrachloride at -20°C within 1 hour. After the dropwise ...

Embodiment 2

[0084] The reaction bottle with branch tube is fully replaced with nitrogen, add 100ml of titanium tetrachloride to cool down to -20°C, then add spherical particles of magnesium chloride alcoholate within 1h, stir and start to heat up after full contact, when the temperature rises to 60°C Add isobutyl 2-methoxybenzoate with a molar ratio of 0.125:1 to magnesium halide, continue to heat up, and when the temperature rises to 110°C, continue to add 2-methoxybenzene with a molar ratio of 0.125:1 to magnesium chloride Isobutyl formate, and react at this temperature for 2 hours. After the reaction, filter out the liquid, add 100ml of titanium tetrachloride, continue the reaction at 110°C for 2 hours, filter out the liquid, wash with dry hexane, vacuum dried to obtain a solid catalyst component. The molar ratio of titanium tetrachloride and alcoholate is 2.8:1. The molar ratio of the total amount of isobutyl 2-methoxybenzoate to magnesium chloride added twice is 0.25:1. Composition...

Embodiment 3

[0090] The reaction bottle with a branch tube is fully replaced with nitrogen, and 100ml of toluene solvent is added to cool down to 0°C, then ethoxylated magnesium spherical particles are added within 1 hour, and then 50ml of titanium tetrachloride and the molar ratio of ethoxymagnesium to 0.125 are added sequentially: 1 of isobutyl 2-methoxybenzoate, stir until fully contacted and start to heat up, when the temperature rises to 60 °C, add 2-methoxyisobutyl benzoate with a molar ratio of 0.125:1 to magnesium ethoxide Esters, continue to heat up, stop heating when the temperature rises to 110°C, react at this temperature for 2 hours, filter the liquid after the reaction, add 50ml titanium tetrachloride and 100ml toluene solvent, continue the reaction at 110°C for 2 hours hours, the liquid was filtered, washed with dry hexane, and dried in vacuo to obtain a solid catalyst component. The molar ratio of titanium tetrachloride and magnesium ethoxide is 2.8:1. The molar ratio of t...

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Abstract

The invention discloses a solid catalyst component for olefin polymerization. The solid catalyst component comprises magnesium halide (1), a titanium active component (2) and a 2-alkoxy benzoate compound (3); the structural general formula of the 2-alkoxy benzoate compound is represented by the formula 1; in the formula 1, R1 and R2 are same or different and are independently selected from alkyl containing 1-12 carbon atoms and naphthenic base, aryl or aralkyl containing 3-8 carbon atoms; and R3, R4, R5 and R6 are same or different and are independently selected from hydrogen, alkyl containing 1-8 carbon atoms and naphthenic base, aryl or aralkyl containing 3-8 carbon atoms. The solid catalyst component, aluminium alkyl and a silane compound form a catalyst for olefin polymerization (copolymerization) so as to obtain a polymer having high activity and high isotacticity.

Description

technical field [0001] The invention relates to a solid catalyst component for olefin polymerization and its preparation method and application, in particular to a solid catalyst component containing 2-alkoxybenzoate compounds and its preparation method and application. Background technique [0002] As a general-purpose plastic, polypropylene is widely used in various industrial and civil plastic products such as injection molding, extrusion, film blowing, coating, spinning, and modified engineering plastics. It has become the fastest growing among the five general-purpose resins. Fast product. The fundamental reason for the rapid development of the polypropylene industry lies in the continuous innovation of catalysts and polymerization processes, which has led to the emergence of new polypropylene products and greatly expanded the application fields of polypropylene. The most widely used propylene polymerization catalyst in industry today is the Ziegler-Natta catalyst. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646
Inventor 李化毅周倩李倩张辽云胡友良
Owner INST OF CHEM CHINESE ACAD OF SCI
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