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Preparation method of catalyst for ethylene polymerization

A catalyst and polyethylene technology, applied in the field of preparing solid catalysts, can solve the problems of low activity and achieve uniform particle size and apparent density, excellent polymerization activity, and high apparent density

Pending Publication Date: 2021-06-25
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this catalyst composition has the disadvantage of low activity
Moreover, this type of catalyst combination method is not suitable for the polymerization of ultra-high molecular weight polyethylene, which must have uniform particle size and high apparent density.

Method used

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  • Preparation method of catalyst for ethylene polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] [Preparation of a solid catalyst for the production of ultra-high molecular weight polyethylene]

[0029] Step (1): Preparation of magnesium halide alcohol adduct solution

[0030] After replacing the atmosphere in a 1L reactor equipped with a mechanical stirrer with a nitrogen atmosphere, 20 g of solid magnesium dichloride (MgCl 2 ), 120ml toluene and 60ml n-butanol were added to the reactor and stirred at 350rpm. After raising the temperature to 65° C. over 1 hour, the reactor was kept for 2 hours to obtain a homogeneous solution of the magnesium halide alcohol adduct well dissolved in the solvent.

[0031] Step (2): Preparation of magnesium halide carrier

[0032] After cooling the temperature of the solution prepared in step (1) to 20°C, 20ml of TiCl 4 Inject it slowly over 40 minutes (0.5ml / minute). Then, 62.5ml TiCl 4 Inject it faster with 100 minutes (0.625ml / minute). At this point, the temperature was carefully maintained so as not to increase the temperat...

Embodiment 2

[0042] Example 2 was carried out in the same manner as Example 1, except that 2-isopropyl-2-(1-methylbutyl)-1,3-dimethoxypropane in Example 1 was replaced by 36.2 mmol Diethyl succinate.

Embodiment 3

[0044] Example 3 was carried out in the same manner as in Example 1, except that 2-isopropyl-2-(1-methylbutyl)-1,3-dimethoxypropane in Example 1 was replaced by 36.2 mmol Diethyl malonate.

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Abstract

Disclosed is a method for preparing a solid catalyst capable of controlling a molecular weight distribution and polydispersity according to an organic compound as used in a polymerization reaction, in which the solid catalyst contains titanium tetrachloride and a diester or diether organic compound. The catalyst having excellent polymerization activity, and allowing uniform particle size and high apparent density of the ultra-high molecular weight polyethylene, and easily controlling the molecular weight distribution and polydispersity of the ultra-high molecular weight polyethylene may be prepared simply and efficiently.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit and priority of Korean Patent Application 10-2019-0174007 filed on December 24, 2019. The entire content of the aforementioned application is incorporated herein by reference. technical field [0003] The invention relates to a preparation method of a magnesium-loaded titanium solid catalyst for producing ultra-high molecular weight polyethylene. The present invention relates to a method for preparing a solid catalyst which can control the molecular weight distribution and polydispersity according to the organic compound used in the polymerization reaction, wherein the solid catalyst contains titanium tetrachloride and a diester or diether organic compound. Background technique [0004] Ultra-high molecular weight polyethylene (UHMEP) refers to polyethylene having a weight average molecular weight of 250,000 to 10,000,000 g / mol. Because the molecular weight is very large compared w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F110/02C08F4/02C08F4/649C08F4/651
CPCC08F10/02C08F110/02C08F4/022C08F4/6494C08F4/651C08F2500/01C08F4/6545C08F2500/18C08F2500/24C08F4/76
Inventor 李承烨李镇佑
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
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