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Solid catalyst component for olefin polymerization and catalyst system

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization, can solve the problem of low activity of olefin polymerization catalysts, and achieve the effect of wide molecular weight distribution characteristics

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is well known that compared with magnesium chloride-supported catalysts, the activity of olefin polymerization catalysts prepared using molecular sieves or silica gel-based supports is too low

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] A, preparation of solid catalyst component

[0117] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, 10.86g of anhydrous magnesium chloride, 249mL of toluene, 10.75g of epichlorohydrin, and 70.7g of tributyl phosphate were sequentially added, and the temperature was maintained at 60°C under 300rmp stirring for 2 Hour. Then 2.5 g of phthalic anhydride were added and the temperature at 60° C. was maintained for a further 1 hour. The solution was cooled to 15°C. In advance, 2.1g of surfactant (alcoholyzate of maleic anhydride-methacrylate copolymer) and 220mL of food grade No. 100 white oil (kinematic viscosity (40°C) at 100mm2 / s) were mixed uniformly to form a mixture. Within 40 minutes, 151 mL of titanium tetrachloride and the mixture were added dropwise at the same time. After the dropwise addition was completed, the mixture was stirred at 400 rpm for 1 hour. The temperature was then gradually raised to 80°C over 3 hours. Add 3 mL o...

Embodiment 2

[0122] A, preparation of solid catalyst component

[0123] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, 10.86g of anhydrous magnesium chloride, 272mL of toluene, 9.76g of epichlorohydrin, and 78g of tributyl phosphate were added in sequence, and maintained at 60°C for 2 hours under stirring at 300rmp . Then 3 g of phthalic anhydride were added and the temperature at 60° C. was maintained for a further 1 hour. The solution was cooled to 10°C. In advance, 3.2g of surfactant (alcoholyzate of maleic anhydride-methacrylate copolymer) and 240mL of food grade No. 100 white oil (kinematic viscosity (40°C) at 100mm2 / s) were mixed uniformly to form a mixture. Within 40 minutes, 135 mL of titanium tetrachloride and the mixture were added dropwise at the same time. After the dropwise addition was completed, the mixture was stirred at 400 rpm for 2 hours. The temperature was then gradually raised to 85°C over 3 hours. During the heating process, 3 ...

Embodiment 3

[0128] A, preparation of solid catalyst component

[0129] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, 10.86g of anhydrous magnesium chloride, 211mL of toluene, 11.5g of epichlorohydrin, and 68g of tributyl phosphate were added in sequence, and kept under stirring for 2 hours at a temperature of 60°C. Then 2.5 g of phthalic anhydride were added and the temperature at 60° C. was maintained for a further 1 hour. Cool the solution to 0°C, add 3 g of 9,9-dimethoxymethylfluorene, and continue stirring for 60 min. In advance, mix 2.5g of surfactant (alcoholyzate of maleic anhydride-methacrylate copolymer) with 260mL of food grade No. 100 white oil (kinematic viscosity (40°C) at 100mm 2 / s) Mix well to form a mixture. Within 40 minutes, 165 mL of titanium tetrachloride and the mixture were added dropwise at the same time. After the dropwise addition, the mixture was stirred at 400 rpm for 1 hour. Then gradually increase the temperature to 85°C...

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Abstract

The invention provides a solid catalyst component for olefin polymerization, which comprises a solid substance formed by contacting magnesium halide, Lewis base, Lewis acid, an assistant precipitation agent, a surfactant and an internal electron donor in an inert dispersion medium and an organic solvent, and the solid substance has pore size distribution of multiple peaks and a specific surface area of not less than 50m < 2 > / g; wherein the pore size distribution condition of a plurality of peaks of the solid substance is that at least one peak exists in the pore size range of 1 nm to 100 nm, and at least another peak exists in the pore size range of 5 nm to 200 nm. When the catalyst formed by the solid catalyst component is used for propylene polymerization, the catalyst has higher polymerization activity and higher stereotactic ability; particularly, compared with the prior art, under the condition of the same internal electron donor, the catalyst provided by the invention is used for preparing a polymer through propylene polymerization, and the polymer has a wider molecular weight distribution characteristic.

Description

technical field [0001] The invention relates to the technical field of olefin polymerization, in particular to a solid catalyst component and catalyst system for olefin polymerization. Background technique [0002] Magnesium chloride-supported Ziegler-Natta catalysts are the main olefin polymerization catalysts currently on the market. The production of this catalyst can be divided into two types of methods. The first type is to prepare magnesium-containing compounds or complex solids as carriers. To prepare such supports, such as magnesium chloride alcoholate supports, and then contact them with titanium-containing compounds to form magnesium chloride-supported titanium catalyst solids, and then support internal electron donor compounds to form catalyst components. The nitrogen adsorption method is used to test this kind of catalyst components, and it usually shows a unimodal pore distribution with a most probable pore size within 10nm, and there is no report on a catalyst...

Claims

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Application Information

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IPC IPC(8): C08F110/06C08F4/02C08F4/649C08F4/646
CPCC08F110/06C08F4/6465C08F4/6494C08F4/6497C08F4/022C08F2500/04C08F2500/12C08F2500/15C08F2500/18Y02P20/52
Inventor 岑为周俊领严立安付梅艳张纪贵张晓帆张天一齐琳王迎赵惠王宇
Owner CHINA PETROLEUM & CHEM CORP
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