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Ethylene polymer catalyst with ultra-high molecular weight, and preparation method and application of catalyst

A technology of ethylene polymerization and catalyst, which is applied in the field of ultra-high molecular weight ethylene polymer catalyst and its preparation, and can solve problems such as unsatisfactory ethylene polymerization activity

Active Publication Date: 2018-01-19
谢炳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the catalyst reported by CN101906181A is used for ethylene polymerization, the bulk density is high, but the ethylene polymerization activity is not satisfactory

Method used

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  • Ethylene polymer catalyst with ultra-high molecular weight, and preparation method and application of catalyst
  • Ethylene polymer catalyst with ultra-high molecular weight, and preparation method and application of catalyst
  • Ethylene polymer catalyst with ultra-high molecular weight, and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Add 2 grams of magnesium ethoxide, 4 ml octanol and 15 ml n-heptane in a reactor protected by inert gas, add 0.03 mol of tetramethyl (1,2,3,4-tetrahydroquinoline-2, 4-disubstituted) bisphosphonate, after heating to reflux for 2 hours, cool the system to -25°C, slowly add 20ml of titanium tetrachloride and stir for 1 hour, then add 0.4g of diisophthalic acid after heating up to 60°C Butyl ester reacted for 2 hours, filtered off the supernatant, then added 25ml of titanium tetrachloride and ethyl titanate (volume ratio = 1:1) mixed solution, raised the temperature to 110°C for 2 hours, filtered, washed, and vacuum dried to obtain The solid catalyst is designated as Catalyst 1.

Embodiment 2

[0073] With reference to the method of Example 1, the catalysts of Example 2 can be prepared according to the ratio of raw materials in Table 1 below, which are respectively denoted as Catalyst 2, Catalyst 3, Catalyst 4, Catalyst 5, Catalyst 6, Catalyst 7 and Catalyst 8.

Embodiment 3

[0076] Embodiment 3 Polymerization activity test

[0077]Catalysts prepared in Examples 1, 2 and Comparative Example 1 were used to test the catalytic activity. Replace the 10L polymerization reactor with nitrogen, add 5000ml of hexane, 0.01mol of triethylaluminum, 30 mg of the catalyst prepared in Example 1, 2 and Comparative Example 1, control the pressure at 1.0MPa, feed ethylene, and control the polymerization temperature at 60 ℃~75℃, polymerized for 2 hours, vented the gas in the reactor, lowered to normal pressure, removed the solvent, and obtained the ultra-high molecular weight polyethylene product. The polymerization results are listed in Table 1:

[0078] Table 1

[0079]

[0080] As can be seen from the results in Table 1, catalyst 1-8 has higher catalytic activity than catalyst 1-3 of comparative example, and the obtained polymer has a high bulk density and higher molecular weight than the product obtained by catalytic polymerization of catalyst 1-3 of comparat...

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Abstract

The invention provides an ethylene polymer catalyst with an ultra-high molecular weight, and a preparation method and application of the catalyst. The catalyst comprises an alkoxy magnesium carrier, and an internal electron donor compound and a titanium-containing compound which are loaded on the carrier, wherein the molecular formula of the alkoxy magnesium is MgOR1R2, the internal electron donorcompound comprises an organic phosphorus compound represented as a formula I, and the titanium-containing compound comprises TiCl4. The catalyst has the characteristics of high activity and flexibleadjustment of the molecular weight of the polymer when the catalyst is used for ethylene polymerization, and the obtained polymer is high in packing density, and has a molecular weight which can reach6.7 million.

Description

technical field [0001] The invention relates to an ultra-high molecular weight ethylene polymer catalyst and its preparation method and application, in particular to a preparation method of a supported titanium series catalyst. Background technique [0002] Ultra-high molecular weight polyethylene (hereinafter referred to as "UHMWPE") has unparalleled impact resistance, abrasion resistance, chemical corrosion resistance, low temperature resistance, stress crack resistance, adhesion resistance, and excellent insulation properties that other engineering plastics cannot match. , safety and health and self-lubricating properties, can be widely used in machinery, papermaking, mining, electric power, agriculture, sports, transportation and other fields. [0003] UHMWPE generally has a molecular weight greater than 1.5 million and a low melt index, and the product is mainly in the form of powder. The morphology, particle size distribution and resulting bulk density of UHMWPE powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F110/02C08F4/649C08F4/651
Inventor 谢炳
Owner 谢炳
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