High-activity olefin polymerization catalyst, preparation method and application

A technology of olefin polymerization and catalyst, which is applied in the field of catalyst and catalyst preparation, which can solve the problems of low catalyst activity and easy adhesion on the container wall, etc., and achieve the effects of high catalyst activity, good particle shape, and simple preparation method

Active Publication Date: 2013-02-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst activity is low, and the main catalyst particles are easy to adhere to the container wall

Method used

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  • High-activity olefin polymerization catalyst, preparation method and application
  • High-activity olefin polymerization catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 1 g of magnesium dichloride, 20 ml of n-decane, 0.2 ml of ethanol, and 6.5 ml of iso-octanol into the reactor fully replaced by nitrogen, stir and heat up to 120 ° C, react for 2 h, and the solid is completely dissolved to form a uniform solution . Cool down to 50°C, add 2.1 ml of tributyl orthophosphate and 0.15 ml of tetraethoxysilane in sequence, and keep the temperature at 50°C for 2 h. Lower the system to -15°C, add 30 ml of titanium tetrachloride dropwise, react for 1 h, then raise the temperature to 110°C for another 2 h. Stop stirring, let stand, 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

[0039] Add 1 g of magnesium dichloride, 30 ml of n-decane, 0.25 ml of ethanol, and 7 ml of isooctyl alcohol into the reactor fully replaced by nitrogen, stir and heat up to 120°C, react for 2 h, and the solid is completely dissolved to form a uniform solution . Cool down to 60°C, add 1.1 ml of tributyl orthophosphate and 0.5 ml of tetraethoxysilane in sequence, and keep the temperature at 60°C for 2 h. Lower the system to -10°C, add 40 ml of titanium tetrachloride dropwise, react for 1 h, then raise the temperature to 100°C for another 3 h. Stop stirring, stand still, 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

[0041] Add 1 g of magnesium dichloride, 20 ml of n-decane, 0.2 ml of ethanol, and 8 ml of iso-octanol into a reactor fully replaced by nitrogen, stir and heat up to 100°C, react for 2 h, and the solid is completely dissolved to form a uniform solution . The temperature was lowered to 50°C, 13 ml of tributyl orthophosphate and 2 ml of tetraethoxysilane were sequentially added, and the temperature was raised to 80°C for 2 h. Lower the system to -15°C, add 35 ml of titanium tetrachloride dropwise, react for 1 h, then raise the temperature to 65°C for another 2 h. 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 relates to a high-activity olefin polymerization catalyst, a preparation method and an application and belongs to the field of olefin polymerization. The high-activity olefin polymerization catalyst is composed of a main catalyst and a cocatalyst and characterized in that the main catalyst is composed of a magnesium halide carrier, a transition metal halide, alcohol which is smaller than C5, alcohol which is larger than C5, an organosilicon compound and an organic phosphorus compound; the mole ratio of the magnesium halide carrier, the transition metal halide, the alcohol which is smaller than C5, the alcohol which is larger than C5, the organosilicon compound and the organic phosphorus compound is 1: (1-40): (0.01-5): (0.01-10): (0.01-10): (0.05-5); and the cocatalyst is an organic aluminum compound. Particles of the catalyst are good in shape, spherical and free from adhering to the wall of a container; and the catalyst is high in activity, good in hydrogen regulation performance and applicable to a slurry polymerization process, a loop polymerization process, a gas phase polymerization process or a combined polymerization process, and a melt flow rate (MFR) of polyethylene can be regulated within a range of 0.1g/10min-600g/10min.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649C08F4/646C08F4/02C08F4/658C08F4/656C08F4/654C08F4/651C08F110/02C08F110/06C08F210/16C08F210/06
Inventor 黄启谷刘伟刘智李凤娇程璐
Owner BEIJING UNIV OF CHEM TECH
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