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Catalyst components and catalyst for olefin polymerization, preparation method of catalyst component, and application of catalyst

A technology of olefin polymerization and catalyst, which is applied in the field of catalyst and its application, catalyst components of olefin polymerization reaction and its preparation, and can solve the problems of catalyst stability and fluidity, insufficient catalyst activity, and increased fine powder content, etc. Achieve the effects of less crushing, low fine powder content and good slurry stability

Inactive Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the activity of the catalyst is still not high enough
[0006] CN100408603C discloses a catalyst for ethylene polymerization prepared by a spray drying process. The catalyst has good activity, but in the gas phase polymerization, it will still produce serious fragmentation and cause the fine powder content to rise
[0007] The above published patents are all emphasizing the polymerization performance of the catalyst, but not involving the performance of the catalyst in terms of stability and flow

Method used

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  • Catalyst components and catalyst for olefin polymerization, preparation method of catalyst component, and application of catalyst
  • Catalyst components and catalyst for olefin polymerization, preparation method of catalyst component, and application of catalyst
  • Catalyst components and catalyst for olefin polymerization, preparation method of catalyst component, and application of catalyst

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preparation example Construction

[0041] The second aspect of the present invention provides a kind of preparation method of above-mentioned catalyst component, and this preparation method comprises:

[0042] Step S1, preparation of mother liquor: contacting electron donor compound, magnesium halide, and titanium halide to prepare mother liquor;

[0043] Step S2, carrier blending: blending the mother liquor prepared in step S1 with the ultrafine inorganic oxide carrier, and then adding a substituted acrylamide monomer to obtain a slurry;

[0044] Step S3, spray forming: spray drying the slurry obtained in step S2 to obtain the catalyst component.

[0045] According to the present invention, preferably, the spray drying conditions in the step S3 include: the inlet temperature is 80-240°C, preferably 120-180°C; the outlet temperature is 60-130°C, preferably 90-110°C.

[0046] In the above preparation method, the ultrafine inorganic oxide carrier should be dry when used, that is, without adsorbed water. A suffici...

Embodiment 1

[0063] (1) Preparation of catalyst components

[0064] Add 1.5 grams of TiCl successively to a 250ml four-neck bottle that has been purged with nitrogen 4 , 4.4 g anhydrous MgCl 2 , 100m1 tetrahydrofuran, heated to 65°C under stirring, reacted at this temperature for 3 hours, and cooled to 35°C to obtain the mother liquor;

[0065] Add 6 grams of silica gel (Cabot Corporation TS-610, particle size 0.02-0.1 micron) into a 250m1 four-necked bottle that has been purged with nitrogen, add the cooled mother liquor, keep the temperature at 35°C, stir for 1 hour, then add 0.2 grams of isooctyl acrylamide, continue stirring for 1 hour to obtain a slurry; the obtained slurry is spray-dried with a spray dryer, spraying conditions: inlet temperature 150 ° C, outlet temperature 110 ° C, to obtain a solid catalyst component, wherein The titanium content is 2.17wt%;

[0066] (2) Ethylene slurry polymerization

[0067] Add 1 liter of hexane to the 2 liter polymerization kettle that has b...

Embodiment 2

[0069] (1) The preparation of the catalyst component is the same as in Example 1. Just replace isooctyl acrylamide with n-hexyl acrylamide, the dosage is 0.15 g, and the titanium content of the obtained solid catalyst component is 2.29 wt %;

[0070] (2) Ethylene slurry polymerization is the same as in Example 1.

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Abstract

The invention belongs to the field of catalysts, and discloses catalyst components and catalyst for olefin polymerization, a preparation method of the catalyst components, and application of the catalyst. The catalyst components comprise (1) an ultrafine inorganic oxide carrier, (2) a reaction product of magnesium halide, titanium halide and an electron donor compound, and (3) a substituted acrylamide monomer. According to the catalyst, activity is high, an obtained polymer has higher bulk density, little polymerization breakage and little polymer fine powder, meanwhile, the clearing cycle ofa catalyst feeding pipeline of a gas-phase fluidized bed reactor can be significantly prolonged, and long cycle stable operation of production is ensured.

Description

technical field [0001] The invention belongs to the field of catalysts, and more specifically relates to a catalyst component for olefin polymerization, a preparation method thereof, a catalyst and an application thereof. Background technique [0002] In the polymerization of ethylene or the copolymerization of ethylene and α-olefins, the performance of the catalyst is of course the most concerned aspect, but as a complete polymerization process, the continuity of the process is maintained and the length of the entire process line is guaranteed. Cycle stability is also critical. [0003] In the Unipol gas-phase fluidized bed process, it is currently popular that the catalyst is configured as a white oil slurry and enters the fluidized bed reactor in the form of slurry. Before entering the reactor, according to the requirements of the production grade, in most cases, it needs to go through the pre-reduction process of alkyl aluminum. From the catalyst slurry mixing tank, th...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F4/649C08F4/642C08F4/02C08F2/34
CPCC08F110/02C08F4/6425C08F4/025C08F4/6494C08F4/6495C08F2/34C08F2500/20C08F2500/12
Inventor 李秉毅周俊领寇鹏傅捷马永华黄廷杰
Owner CHINA PETROLEUM & CHEM CORP