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Preparation method of catalyst for ultra-high molecular weight polyethylene synthesis

A technology of ultra-high molecular weight and polyethylene, applied in the production of bulk chemicals, etc., can solve problems such as undiscovered, and achieve the effects of improving activity, reducing agglomeration, and being easy to control

Active Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] There is no report in the existing literature that high-speed emulsification technology is applied to the preparation process of ultra-high molecular weight polyethylene catalysts, thereby improving the activity of the catalyst and the molecular weight of the polymer

Method used

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  • Preparation method of catalyst for ultra-high molecular weight polyethylene synthesis
  • Preparation method of catalyst for ultra-high molecular weight polyethylene synthesis
  • Preparation method of catalyst for ultra-high molecular weight polyethylene synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Main catalyst preparation:

[0051] Under the protection of nitrogen, add 60ml of n-hexane, 1g of anhydrous magnesium chloride, and 5ml of n-butanol into a 250ml three-neck flask equipped with a heating system and a stirring device and a reflux condensing system, then heat up to 70°C and react for 0.5 After 1 hour, a magnesium alkoxide compound solution was obtained; after cooling to room temperature, 0.03 mol of diethylaluminum chloride was added, and reacted at 70°C for 0.5 hour; the emulsification equipment was turned on, and the rotation speed of the emulsification head was adjusted to 16000r / min, and the reaction was maintained for 5 minutes. After closing the emulsification equipment, the reaction was continued at 70°C for 0.5 hour; after cooling to room temperature, 4ml of titanium tetrachloride was added, and the reaction was carried out at 70°C for 2 hours. Finally, the reaction product was repeatedly washed 4 times, and the catalyst was obtained after drying. ...

Embodiment 2

[0055] Catalyst component was prepared in the same way as in Example 1, but in the process of preparing the catalyst, the emulsification treatment time was 0.5 minutes, and the emulsification head rotating speed was 28000r / min, and the catalyst component was polymerized in the same way as in Example 1. The catalyst performance and polymerization product performance are shown in Table 1.

Embodiment 3

[0057] Catalyst component was prepared in the same way as in Example 1, but in the process of preparing the catalyst, the emulsification treatment time was 1 minute, and the emulsification head rotating speed was 22000r / min, and the catalyst component was polymerized in the same way as in Example 1. The catalyst performance and polymerization product performance are shown in Table 1.

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Abstract

The invention relates to a preparation method of a catalyst for compounding ultrahigh molecular weight polyethylene, belonging to the technical field of catalyst preparation. The catalyst is an ultrahigh molecular weight polyethylene catalyst prepared in the following steps of adding alcoholic compounds into a solution formed by the reaction of magnesium halide compound carriers and hydrocarbon solvents to form an alcohol-magnesium compound with magnesium halide; adding halogenated aluminum alkyl to form an intermediate product with the alcohol-magnesium compound; after carrying out emulsification, adding titanium compounds to carry out titanium-carrying reaction; finally washing and drying the generated catalyst particles, so as to obtain the ultrahigh molecular weight polyethylene catalyst. According to the preparation method, by adding the aromatic compounds along with an emulsification technique, the catalyst activity can be substantially improved, meanwhile, the catalyst is stable in reaction kinetics is easily controlled by utilizing a polymerization process, and resin obtained through the polymerization has higher a viscosity-average molecular weight which can reach over four million.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for ultra-high molecular weight polyethylene synthesis, belonging to the technical field of catalyst preparation. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a linear structure polyethylene prepared by ethylene and other olefin monomers through a slurry polymerization process. Its viscosity average molecular weight is greater than 1.5 million, which is more than ten times that of conventional high-density polyethylene (HDPE) The high molecular weight endows it with outstanding properties that many other polymer materials do not have, such as: high impact resistance, high wear resistance, high corrosion resistance even at very low temperatures, Self-lubrication, high comprehensive temperature resistance, good noise reduction performance, good resistance to stress cracking, compliance with hygienic standards, etc. Excellent comprehensive performance makes ...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/658C08F4/655C08F4/654C08F4/651C08F4/02
CPCY02P20/52
Inventor 周建勇李晓庆毕晓龙李留忠李文义于永玲严婕齐立芳李功韬徐晓范大鹏裴小静
Owner CHINA PETROLEUM & CHEM CORP
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