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Solid catalyst component for ethylene polymerization and catalyst therefor

An ethylene polymerization and catalyst technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical/physical process, etc. Low and other problems, to achieve the effect of uniform feeding, uniform feeding, and stable operation

Inactive Publication Date: 2003-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the Chinese patent CN85100997, a catalyst for olefin polymerization is disclosed, which is formed by dissolving magnesium halide in organic epoxy compounds and organic phosphorus compounds to form a uniform solution, and then giving it with at least one precipitation aid and a polycarboxylic acid ester. It is prepared by the action of electron bodies and transition metal titanium halides and their derivatives. When the catalyst is used for propylene polymerization, it shows high polymerization activity and good stereospecificity, but when it is used for ethylene polymerization, the activity is low. , and the particle size distribution of the polymer is wide, and the hydrogen adjustment sensitivity of the catalyst is not good
But in fact, when this catalyst component added with alcohol activator is used in ethylene gas phase polymerization process, especially in the fluidized bed polymerization process, especially in the initial stage of polymerization reaction, the polymerization reaction is faster, so that the resulting polymer The material is easily broken, the polymer particles are relatively fine, and the particle size distribution of 70-150 microns accounts for 50Wt%-60Wt%, and the shape regularity of the polymer particles is not good, and the result is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: 1, the preparation of catalyst component

[0029] Add 4.8 grams of magnesium chloride, 93 milliliters of toluene, 4.0 milliliters of epichlorohydrin, and 12.5 milliliters of tributyl phosphate into the reaction kettle, and react for two hours at a stirring speed of 450 rpm and a temperature of 60°C, and add 1.4 grams of o-benzene Diformic anhydride, continue to react for one hour, lower the temperature to -28°C, add 56 ml of titanium tetrachloride dropwise, gradually raise the temperature to 85°C, keep the temperature for one hour, filter off the mother liquor, pass through the inert diluent toluene and the organic solvent hexane twice After washing and drying, a magnesium / titanium-containing solid A is obtained.

[0030] Add 10 grams of solid A to another reaction kettle, add 90 ml of isopentane, 0.3 g of titanium trichloride and 30 ml of tetrahydrofuran, react at room temperature for one hour, filter off the solution, then add 90 ml of isopentane, 3.5 ml...

Embodiment 2

[0034] In the reaction kettle, add 10 grams of solid A prepared in Example 1, add 90 ml of isopentane, add 0.7 ml of titanium tetrachloride and 5 ml of tetrahydrofuran dropwise at room temperature, react at room temperature for one hour, and then add 2 ml of volume Concentration of 26.43% diethylaluminum chloride was reacted for one hour, and evaporated to dryness to obtain 11.3 grams of solid component B, containing 2.9% (weight) of Ti, 11.96% (weight) of Mg, and 20.6% (weight) of tetrahydrofuran.

[0035] Polymerization evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0037] Add 10 g of the solid component A prepared in Example 1 to the reaction kettle, add 60 ml of toluene and 40 ml of titanium tetrachloride, add 8.3 ml of tetrahydrofuran dropwise at room temperature, raise the temperature to 120° C., react for one hour, and filter off the solution. 100ml of hexane was washed three times, the solution was filtered off, and vacuum-dried to obtain 10.6 grams of solid component B, containing 3.61% (weight) of Ti, 13.5% (weight) of Mg, and 24.1% (weight) of tetrahydrofuran.

[0038] Polymerization evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

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Abstract

The catalyst components for polymerization or copolymerization of ethylene includes at least one titanium compound, at least one electron donor and at least one activator carried onto one kind of Mg / Ti containing solid matter. The catalyst components has relatively narrow grain size distribution and relatively small average grain size, and the catalyst with the catalyst components has relativelyhigher activity and is especially suitable for slurry polymerization and gaseous polymerization to obtain polymer with lower fine powder content. The catalyst is especially suitable for ethylene polymerization with slurry feeding and gaseous fluidized bed polymerization.

Description

technical field [0001] The present invention relates to a solid catalyst component for the polymerization or copolymerization of olefins, especially ethylene, and a catalyst containing the solid catalyst component. technical background [0002] It is well known that in the polymerization of olefins, especially the polymerization of ethylene or the copolymerization of ethylene and α-olefins, catalyst components based on magnesium, titanium, halogens and electron donors are mostly used. When this type of catalyst is used in a gas-phase fluidized bed polymerization process, in order to ensure that the shape and particle size distribution of the catalyst particles are more suitable for the operation in a fluidized state, the above-mentioned catalyst components are usually supported on a carrier such as silica gel. For example: the catalysts disclosed in US4,302,565, US4,379,759 and CN 1064870A for gas-phase fluidized bed reactions are impregnated with matrix components prepared ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/65C08F4/654C08F10/00C08F110/02C08F210/16
CPCC08F210/16C08F10/00C08F110/02C08F2410/06C08F4/651C08F4/6557C08F4/6543C08F2500/12C08F2500/18C08F2500/24C08F210/08B01J31/00C08F4/44C08F4/64
Inventor 王志武谭忠李天益李兴波张凯寇鹏崔海祥郭正阳潘良
Owner CHINA PETROLEUM & CHEM CORP
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