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Catalyst used for ethylene polymerization or copolymerization and its preparation method

A technology for ethylene polymerization and catalyst, applied in the field of catalyst and preparation thereof, can solve the problems of high production cost, complex catalyst production process, etc., and achieve the effects of low production cost, good particle shape and low fine powder content

Active Publication Date: 2006-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of the catalyst is complex and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Catalyst preparation:

[0027] Add 4.8 grams of magnesium chloride, 40 milliliters of toluene, 3.0 milliliters of epichlorohydrin, 3.6 milliliters of tributyl phosphate, and 10.0 milliliters of ethanol into the reaction kettle, and react for two hours at a stirring speed of 450 rpm and a temperature of 60°C. 0.7 g of phthalic anhydride, continue to react for one hour, lower the temperature to -5°C, add 22 ml of titanium tetrachloride dropwise, gradually raise the temperature to 80°C, keep the temperature constant for one hour, filter off the mother liquor, wash with hexane four times, After filtration, 150 ml of hexane was added, and 10.0 ml of silicon tetrachloride was added dropwise at 60°C. After constant temperature for one hour, it was washed twice with hexane and dried to obtain a solid catalyst component.

[0028] polymerization:

[0029] Condition 1: Fill a 2-liter polymerizer with hydrogen and vacuumize it three times alternately, add 1 liter of n-hexane, 2 mm...

Embodiment 2

[0032] Catalyst preparation:

[0033] Add 4.8 grams of magnesium chloride, 40 milliliters of toluene, 3.0 milliliters of epichlorohydrin, 3.6 milliliters of tributyl phosphate, and 7.0 milliliters of ethanol into the reaction kettle, and react for two hours at a stirring speed of 450 rpm and a temperature of 60°C. 0.7 g of phthalic anhydride, continue to react for one hour, lower the temperature to -5°C, add 22 ml of titanium tetrachloride dropwise, gradually raise the temperature to 80°C, keep the temperature constant for one hour, filter off the mother liquor, wash with hexane four times, filter Afterwards, 150 ml of hexane was added, and 2 ml of silicon tetrachloride was added dropwise at 60°C. After constant temperature for one hour, it was washed twice with hexane and dried to obtain a solid catalyst component.

[0034] polymerization

[0035] With embodiment 1, the results are shown in Table 1.

Embodiment 3

[0037] Catalyst preparation

[0038] Other conditions are the same as in Example 1, and the amount of silicon tetrachloride is changed to 5 milliliters.

[0039] polymerization

[0040] With embodiment 1, the results are shown in Table 1.

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PUM

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Abstract

A catalyst for the polymerizing and copolymerizing of ethene and its preparing process is disclosed. The active component of said catalyst is prepared through dissolving magnesium halide in organic epoxy compound, organic P compound, organic alcohol, or inertial deluent to obtain uniform solution, educing out the solid deposition contain Mg / Ti by adding educing assistant and Ti halide or its derivative, and treating the Ti contained component by hydrogenating improver. Its advantages are high activity, high hydrogenating sensitivity and good granular form.

Description

technical field [0001] The invention relates to a catalyst for ethylene polymerization or copolymerization and a preparation method thereof. Background technique [0002] In the polymerization of olefins, especially the polymerization of ethylene or the copolymerization of ethylene and α-olefins, magnesium, titanium, halogen and electron donors are mostly used as the basic components of the catalyst. Chinese patent CN1229092A discloses a catalyst for ethylene polymerization or copolymerization, which is formed by dissolving magnesium halide in organic epoxy compounds and organic phosphorus compounds and adding a low-carbon alcohol as an electron donor stimulator to form a homogeneous solution , prepared by reacting with at least one precipitation aid and transition metal titanium halide and its derivatives, the catalyst shows high activity when used in the slurry polymerization of ethylene, and the particle shape of the obtained polymer is relatively Well, the apparent dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/645
Inventor 王志武谭忠郭正阳寇鹏杨世峰崔海祥周俊领刘翠莲严立安徐慧娟马永华
Owner CHINA PETROLEUM & CHEM CORP
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