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Catalyst for ethylene polymerization, preparation and application thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of ethylene polymerization catalyst and its preparation and application, and can solve the problems of reducing the performance of polyethylene resin products and unsatisfactory polymerization product forms, etc.

Active Publication Date: 2012-10-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic activity of the catalyst and the morphology of the polymerized product are still unsatisfactory, and when the catalyst is applied to the copolymerization of ethylene and higher α-olefins such as 1-hexene, the content of hexane extractables in the resulting polymer remains low. Higher, which will reduce the final product performance of polyethylene resin

Method used

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  • Catalyst for ethylene polymerization, preparation and application thereof
  • Catalyst for ethylene polymerization, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Catalyst preparation

[0030] to pass through N 2 Add 3.0g TiCl to the fully replaced 250mL three-necked bottle 4 , 6.9 g MgCl 2 and 170mL tetrahydrofuran, heated to 65°C under stirring, and reacted at constant temperature for 2 hours, added thiocyanatopropyltriethoxysilane according to the ratio of Ti to alkoxy molar ratio of 1:0.2, reacted at constant temperature for 2 hours, and cooled to 30°C.

[0031] to a passing N 2 After adding 10.4 grams of silica gel (Cabot Corporation TS-610, particle size 0.02-0.1 μm) into a fully replaced 250 mL three-necked flask, add the cooled mother liquor, keep the temperature at 30 ° C, stir for 2 hours, and spray the stirred mother liquor to The instrument sprays and dries the mother liquor, spraying conditions: inlet temperature 160°C, outlet temperature 80°C, to obtain a solid catalyst component, in which the Ti content is 2.05%, the Mg content is 6.33%, and the THF content is 29.7%. Add mineral oil in the solid catalyst co...

Embodiment 2

[0037] 1. Catalyst preparation

[0038] to pass through N 2 Add 3.0g TiCl to the fully replaced 250mL three-necked bottle 4 , 6.9 g MgCl 2 and 170mL tetrahydrofuran, heated to 65°C under stirring, reacted at constant temperature for 2 hours, added thiocyanatopropyl triethoxysilane according to the ratio of Ti to alkoxy molar ratio of 1:0.4, reacted at constant temperature for 2 hours, and cooled to 30°C.

[0039] to a passing N 2 After adding 10.4 grams of silica gel (Cabot Corporation TS-610, particle size 0.02-0.1 μm) into the replaced 250 mL three-neck flask, add the cooled mother liquor, keep the temperature at 30 ° C, stir for 2 hours, and spray the stirred mother liquor Spray-dry the mother liquor, spraying conditions: inlet temperature 160°C, outlet temperature 80°C, to obtain a solid catalyst component, wherein the Ti content is 2.17%, the Mg content is 6.03%, and the THF content is 29.5%. Add mineral oil in the solid catalyst component that obtains, be made into ...

Embodiment 3

[0045] 1. Catalyst preparation

[0046] to pass through N 2 Add 3.0g TiCl to the fully replaced 250mL three-necked bottle 4 , 6.9 g MgCl 2 and 170mL tetrahydrofuran, heated to 65°C under stirring, reacted at constant temperature for 2 hours, added thiocyanatopropyl triethoxysilane according to the ratio of Ti to alkoxy molar ratio of 1:0.6, reacted at constant temperature for 2 hours, and cooled to 30°C.

[0047] to a passing N 2 After adding 10.4 grams of silica gel (Cabot Corporation TS-610, particle size 0.02-0.1 μm) into the replaced 250 mL three-neck flask, add the cooled mother liquor, keep the temperature at 30 ° C, stir for 2 hours, and spray the stirred mother liquor Spray-dry the mother liquor, spraying conditions: inlet temperature 160°C, outlet temperature 80°C, to obtain a solid catalyst component, wherein the Ti content is 2.38%, the Mg content is 6.25%, and the THF content is 28.9%. Add mineral oil in the solid catalyst component that obtains, be made into ...

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Abstract

The invention relates to a catalyst for ethylene polymerization, its preparation and application. The catalyst comprises titanium-bearing active components and activator component, wherein, the titanium-bearing active components comprise at least one kind of magnesium halide, at least one kind of titanium halide, at least one kind of electron donor compound and at least one kind of modifier whichare loaded on a silica carrier; The electron donor compound is selected from alcohol or ether, and the modifier is thiocyanate propyltriethoxysilane. The activator component shown as AlR'nX3-n is an organo-aluminum compound, wherein, R' represents hydrogen of C1-20 alkyl, X represents halogen, and n represents a number which is larger than 1 and no larger than 3. The molar ration of the titanium-bearing active components to the activator component is 1 to 200. The catalyst for ethylene gasphase polymerization or copolymerization has the advantages of high catalytic activity, high bulk densityof polyethylene powder, little fine powder and the like.

Description

technical field [0001] The present invention relates to a slurry type highly active silica gel carrier catalyst component for ethylene gas phase polymerization or copolymerization process and its preparation, and the application of the catalyst in ethylene gas phase polymerization or copolymerization, especially ethylene gas phase fluidized bed polymerization Applications in condensed or ultra-condensed polymerizations. Background technique [0002] The gas-phase polyethylene process is an advanced polyethylene production process. There are many sets of equipment in the world that use the gas-phase process to produce polyethylene. The Ziegler-Natta catalyst suitable for the gas phase polyethylene process should have good fluidity, and its shape should be spherical or quasi-spherical. The form of the catalyst is usually the form of the copy carrier, so there are two ways of thinking when studying the carrier, one is to use MgCl 2 or MgCl 2 The complex compound is re-precip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/646C08F2/34C08F210/16
Inventor 何书艳姜涛王刚吴林美邹恩广姜进宪王立娟张丽洋马丽杨国兴赵增辉魏静任鹤姜再丰罗明检王鹏张艳玲谷振生常玉红宫向英殷喜丰刘景江宁英男邴淑秋金鑫刘丽军
Owner PETROCHINA CO LTD