Olefin polymerization catalyst, and preparation method and application of catalyst

A technology of olefin polymerization and catalyst, which is applied in the field of catalyst and catalyst preparation, and can solve the problems of low catalyst activity and easy adhesion on the container wall

Active Publication Date: 2013-05-01
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst activity is low, and the main cat

Method used

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  • Olefin polymerization catalyst, and preparation method and application of catalyst
  • Olefin polymerization catalyst, and preparation method and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Add 1g of magnesium dichloride, 20ml of n-decane, 0.2ml of ethanol, and 6.5ml of isooctyl alcohol into the reactor fully replaced by nitrogen, stir and heat up to 120°C, react for 2h, and the solid is completely dissolved to form a uniform solution. Cool down to 50°C, add 2.1ml of tributyl orthophosphate and 0.15ml of tetraethoxysilane in sequence, and keep the temperature at 50°C for 2h. Lower the system to -15°C, add 30ml of titanium tetrachloride dropwise, then add 0.01g of fructose, react for 1h, raise the temperature to 110°C for another 2h. Stop stirring, stand still, separate layers, filter, wash with hexane four times (30 ml each time), and vacuum dry at 70°C for 2 hours to obtain a spherical powder with good fluidity, non-stick container wall, uniform particle size distribution solid catalyst.

Embodiment 2

[0044] Add 1g of magnesium dichloride, 30ml of n-decane, 0.25ml of ethanol, and 7ml of isooctyl alcohol into the reactor fully replaced by nitrogen, stir and heat up to 120°C, react for 2h, and the solid dissolves completely to form a uniform solution. Cool down to 60°C, add 1.1ml of tributyl orthophosphate and 0.5ml of tetraethoxysilane in sequence, and keep the temperature at 60°C for 2 hours. The system was lowered to -10°C, 40ml of titanium tetrachloride was added dropwise, and then 0.2 g of tetrahydroxyoctasiloxane was added to react for 1 hour, then heated to 100°C for another 3 hours. Stop stirring, let stand, separate layers, filter, wash with hexane four times (30 ml each time), and vacuum dry at 60°C for 3 hours to obtain a spherical powder with good fluidity, uniform particle size distribution, non-stick container wall solid catalyst.

Embodiment 3

[0046] Add 1g of magnesium dichloride, 20ml of n-decane, 0.2ml of ethanol, and 8ml of isooctyl alcohol into the reactor fully replaced by nitrogen, stir and heat up to 100°C, react for 2h, and the solid dissolves completely to form a uniform solution. The temperature was lowered to 50°C, 13ml of tributyl orthophosphate and 2ml of tetraethoxysilane were sequentially added, and the temperature was raised to 80°C for 2 hours. Lower the system to -15°C, add dropwise 35ml of titanium tetrachloride, and then add 0.2 g of tetrahydroxy POSS, react for 1 hour, raise the temperature to 65°C and react for another 2 hours. Stop stirring, stand still, separate layers, filter, wash with hexane four times (30 ml each time), and vacuum dry at 50°C for 4 hours to obtain a spherical powder with good fluidity, uniform particle size distribution, non-stick container wall solid catalyst.

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Abstract

The invention provides a high-efficiency olefin polymerization catalyst, and a preparation method and an application of the catalyst. The olefin polymerization catalyst comprises a main catalyst and a cocatalyst, and is characterized in that the main catalyst comprises a magnesium halide carrier, transition metal halide, less than C5 alcohol, greater than C5 alcohol, an organic silicon compound, an organic phosphorus compound and a solid polyhydroxy substance. Solid particles of the catalyst are good in shape and spherical; the particles of the catalyst are not adhered to a wall of a container; the catalyst is high in activity and good in hydrogen regulation performance; a melt flow rate (MFR) of polyethylene can be regulated within 0.1g/10min-600g/10min; and the catalyst is suitable for a slurry method polymerization technology, a ring pipe polymerization technology, a gas phase method polymerization technology or a combination polymerization technology.

Description

technical field [0001] The invention belongs to the fields of high-efficiency olefin polymerization catalysts and olefin polymerization, and in particular relates to a catalyst for homopolymerization or copolymerization of olefins, a preparation method and application of the catalyst. Background technique [0002] Olefin polymerization catalysts are the core of polyolefin polymerization technology. From the perspective of the development of olefin polymerization catalysts, there are two main aspects: (1) Development of polyolefin resin catalysts that can prepare special or better performance, such as metallocene catalysts (2) For the production of general-purpose polyolefin resins, on the basis of further improving catalyst performance, simplify the catalyst preparation process, reduce catalyst costs, and develop environmentally friendly technologies to improve efficiency ,Increase competitiveness. Before the 1980s, the focus of polyethylene catalyst research was on the pur...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/658C08F10/02C08F10/06C08F210/16C08F210/06
Inventor 黄启谷程璐刘伟李凤娇
Owner BEIJING UNIV OF CHEM TECH
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