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Catalyst component, preparation method and catalyst for ethylene polymerization

An ethylene polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of inapplicability of supercritical high temperature polymerization process, poor catalyst particle shape, etc., and achieve the effect of high catalyst activity and good particle shape

Active Publication Date: 2009-07-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current high-temperature polymerization catalysts are all concentrated in the solution polymerization process with a polymerization temperature higher than 150°C. For example, patents CN1087302, CN1041834, etc. disclose catalytic systems suitable for high-temperature polymerization. Due to the poor particle shape of this type of catalyst, they are not suitable for polymerization. Supercritical high-temperature polymerization process with low-boiling-point solvent at a temperature of 90-150°C

Method used

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  • Catalyst component, preparation method and catalyst for ethylene polymerization
  • Catalyst component, preparation method and catalyst for ethylene polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Under the protection of nitrogen, in the reaction flask after the high-temperature drying with a stirrer, add 8.0 grams of heat-activated silica gel (model 948, U.S. Grace Company), 100 milliliters of purified hexane and 12.6 ml of dibutylmagnesium successively. Heptane solution (1.0mmol / ml), react at 40°C for 1 hour, add 1.4ml of Cl dropwise 3 CCH 2 OH, after reacting at 40°C for 1 hour, add 2.0ml of tert-butyl chloride dropwise, continue to stir for half an hour, add dropwise 2.0ml of titanium tetrachloride, stir and react at 45°C for 1 hour, then press filter, and use 100ml of hexane It was washed three times with alkane, and finally dried with nitrogen flow to obtain a light brown solid flowable powder.

[0034] Catalyst evaluation: Slurry polymerization of ethylene was carried out at different temperatures. The polymerization conditions are as follows: 2L stainless steel stirred tank, 1L hexane, total pressure of polymerization: 1.03MPa, P H2 / P C2H4 =0.28 / 0.75 ...

Embodiment 2

[0037] Preparation of catalyst components: 2.0ml of tert-butyl chloride in Example 1 was adjusted to 1.5ml of 1,2-dichloroethane, and other conditions were the same as in Example 1.

[0038] The evaluation conditions for the slurry polymerization of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

Embodiment 3

[0040] Preparation of catalyst components: 2.0ml of tert-butyl chloride in Example 1 was adjusted to 2.0ml of chlorocyclohexane, and other conditions were the same as in Example 1.

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Abstract

The present invention provides a catalyst component for ethylene polymerization and its preparation method and application, which comprises an inorganic oxide carrier, on which at least one organomagnesium compound and at least one halogenated alcohol are loaded, at least one organochlorine compound and at least one titanium compound. The catalyst not only has a good particle shape, but also has high catalyst activity in the supercritical high-temperature polymerization process. At the temperature required by the supercritical high-temperature polymerization process, there is no problem that the activity rapidly decays with the increase of the polymerization temperature.

Description

technical field [0001] The present invention relates to a catalyst component and its catalyst for the polymerization or copolymerization of olefins, especially ethylene, as well as the preparation method and application of the catalyst component. technical background [0002] At present, there are many polymerization processes that can polymerize or copolymerize ethylene. The polymerization reaction can be carried out in gas phase, slurry, or solution. If ethylene is polymerized in solution, the polymerization temperature must be higher than the melting temperature of polyethylene. In some slurry In the polymerization process, due to the application of low boiling point solvent supercritical polymerization technology, the polymerization temperature required by the process is also very high. [0003] The polymerization of ethylene is an exothermic reaction that requires the removal of the heat of polymerization during the polymerization process. When the heat of polymerizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/643
Inventor 高克京王洪涛周俊领吕新平陈伟王如恩王仪森赵勤芳
Owner CHINA PETROLEUM & CHEM CORP