Olefin polymerization catalyst and preparation method and application thereof

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

Inactive Publication Date: 2014-03-05
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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  • Olefin polymerization catalyst and preparation method and application thereof
  • Olefin polymerization catalyst and preparation method and application thereof
  • Olefin polymerization catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 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, 0.15ml of tetraethoxysilane and 2.1ml of tributyl borate in sequence, and keep the temperature at 50°C for 2 hours. 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

[0043] 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, 0.5ml of tetraethoxysilane and 1.0ml of tributyl borate 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

[0045] 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 is completely dissolved to form a uniform solution. Cool down to 50°C, add 13ml of tributyl orthophosphate, 2ml of tetraethoxysilane and 0.5ml of trihexyl borate in sequence, and raise the temperature 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 relates to an efficient olefin polymerization catalyst and a preparation method and application thereof, belonging to the field of olefin polymerization. A main catalyst of the olefin polymerization catalyst is made from a magnesium halide support, a transition metal halide, monohydric alcohol with less than 5 carbon atoms, alcohol with more than 5 carbon atoms, an organosilicon compound, an organophosphorus compound and an organoboron compound, wherein the mole ratio of magnesium halide to the transition metal halide to monohydric alcohol with less than 5 carbon atoms to alcohol with more than 5 carbon atoms to the organosilicon compound to the organophosphorus compound to the organoboron compound is 1: (1-40): (0.01-5): (0.01-10): (0.01-10): (0.01-5): (0.01-5); a cocatalyst of the olefin polymerization catalyst is an organoaluminum compound. Particles of the catalyst disclosed by the invention are good in morphology, are spherical and are not adhered to the wall of a container; the catalyst is high in activity and good in hydrogen regulation performance, the melt index MFR (Melt Flow Rate) of polyethylene is adjustable in the range of 0.1g/10min to 600g/10min, and the bulk density of polyethylene particles is high, so that the catalyst is applicable to slurry-method polymerization, loop-tube polymerization, gas-phase method polymerization or combined polymerization processes.

Description

technical field [0001] The invention belongs to the fields of 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 pursuit of catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/649C08F4/646C08F4/52C08F4/58C08F4/02C08F4/648C08F110/02C08F210/16C08F110/06C08F2/06
Inventor 黄启谷余朦山姜婉鹤王静聂言培周阳周露程璐杨万泰
Owner BEIJING UNIV OF CHEM TECH
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