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Alkene coordination polymerization catalyst as well as preparation method and application thereof

A technology of coordination polymerization and catalyst, which is applied in the field of olefin polymerization catalyst and olefin polymerization, and can solve the problems of poor hydrogen adjustment performance of catalysts and other problems

Active Publication Date: 2015-05-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent 96106647.4X discloses an olefin polymerization catalyst and its preparation method, the carrier MgCl 2 Soluble in a mixture of alcohols and alkanes to form liquid MgCl 2 Alcohol adducts, this liquid MgCl 2 Alcohol adducts with TiCl 4 contact to obtain an olefin polymerization catalyst, but the hydrogen adjustment performance of the catalyst is poor, and the melt index MFR of polyethylene can only be adjusted within 0.1g / 10min-220g / 10min

Method used

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  • Alkene coordination polymerization catalyst as well as preparation method and application thereof
  • Alkene coordination polymerization catalyst as well as preparation method and application thereof
  • Alkene coordination polymerization catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] 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 5ml of tetraethoxysilane, and react 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, 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 powdery solid procatalyst with good fluidity, uniform particle size distribution.

Embodiment 2

[0040] 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 0.5ml of tetraethoxysilane, and react for 2h. Lower the system to -10°C, add dropwise 20ml of titanium tetrachloride, and then add 0.2 g of tetrahydroxyoctasiloxane, react for 1 hour, then raise the temperature to 100°C for another 3 hours. Stop stirring, let stand, separate layers, filter, and wash twice with hexane (30 ml each time). Add 20ml of n-decane to the reactor at 10°C, dropwise add 40ml of titanium tetrachloride, react for 1h, raise the temperature to 65°C and react for another 2h. 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 powdery solid procatalyst with good fluidity and uniform pa...

Embodiment 3

[0042] 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 2ml of tetraethoxysilane, and react for 2h. Lower the system to -15°C, add 15ml of titanium tetrachloride dropwise, 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 twice with hexane (30 ml each time), dry in vacuum at 70°C for 2 hours, add 20ml of n-decane to the reactor at 0°C, add dropwise 25ml of tetrachloride TiO, reacted for 1h, and raised the temperature to 65°C for 2h. Stop stirring, let stand, 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 powdery solid procatalyst with good fluidity an...

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Abstract

The invention provides an alkene coordination polymerization catalyst as well as a preparation method and an application thereof. The alkene coordination polymerization catalyst consists of a primary catalyst and an auxiliary catalyst, and is characterized in that the primary catalyst consists of a magnesium halide carrier, a transition metal halide, an ethanol with the carbon number of less than 5, an ethanol with the carbon number of greater than 5, an organosilicon compound and a polyhydroxy solid, wherein the mass ratio of the polyhydroxy solid to the magnesium halide carrier is (0.05-20):100. The catalyst solid particle is in a good shape of sphere, the catalyst is high in activity, the hydrogen regulation performance is favorable, and the melt index MFR of polyethylene can be regulated within 0.1g / 10min-600g / 10min. The alkene coordination polymerization catalyst is suitable for slurry-method polymerization process, gas-phase-method polymerization process or combination polymerization process.

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 and a preparation method 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 efficiency. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F10/06C08F4/649C08F4/648C08F4/646C08F4/70
Inventor 黄启谷郭江平李凤娇刘智
Owner BEIJING UNIV OF CHEM TECH
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