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Solid catalyst component for olefin polymerization, olefin polymerization catalyst and application thereof

A solid catalyst, alkenyl technology, applied in the field of olefin polymerization catalysts, can solve the problems of narrow polymer molecular weight distribution, polymer stereoregularity catalyst hydrogen modulation sensitivity needs to be improved, unfavorable polymer development and other problems

Active Publication Date: 2020-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalysts prepared as internal electron donors have been widely used, there are certain problems in the above-mentioned compounds in practical applications, such as the use of dibasic aromatic carboxylic acid ester compounds. Catalysts with low catalytic activity, and The molecular weight distribution of the obtained polymer is relatively narrow; although the catalyst using 1,3-diether compound has high activity and good hydrogen adjustment sensitivity, the molecular weight distribution of the obtained polymer is narrow, which is not conducive to the development of different grades of polymer; the use of amber Ester compounds are internal electron donors, the advantage of which is that the synthesized polypropylene has a wide molecular weight distribution, but the disadvantage is that the stereoregularity of the polymer and the hydrogen adjustment sensitivity of the catalyst need to be improved
Although catalysts using diol esters can obtain a wider molecular weight distribution, the sensitivity to hydrogen adjustment and the activity under high hydrogen conditions need to be further improved

Method used

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  • Solid catalyst component for olefin polymerization, olefin polymerization catalyst and application thereof
  • Solid catalyst component for olefin polymerization, olefin polymerization catalyst and application thereof
  • Solid catalyst component for olefin polymerization, olefin polymerization catalyst and application thereof

Examples

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preparation example Construction

[0091] The preparation method of solid catalyst component among the present invention includes but not limited to following method:

[0092] Method 1: Magnesium compound is dissolved in organic epoxy compound and organic phosphorus compound to form a uniform solution. After adding a precipitation aid to dissolve, the solid is precipitated under the action of the titanium compound; an internal electron donor is added to make it attached to the solid. , Then treated with titanium tetrahalide and inert diluent.

[0093] Method 2: In an inert solvent such as decane or toluene, dissolve the solid magnesium compound in an organic alcohol compound such as 2-ethylhexanol, add a precipitation aid to dissolve, and precipitate the solid under the action of the titanium compound; The electron body is obtained by loading it on a solid object and then treating it with a titanium compound and an inert diluent.

[0094] Method 3: Disperse the magnesium halide alcoholate in an inert solvent t...

Embodiment 1

[0156] The solid catalyst component was prepared as follows.

[0157] Under the protection of high-purity nitrogen, using a 300mL glass reactor, sequentially add 0.0403 moles of anhydrous magnesium dichloride, 70 milliliters of toluene, 0.0409 moles of epichlorohydrin, and 0.0366 moles of tributyl phosphate at a temperature of 60°C. Dissolve the carrier completely in 120 minutes, add 0.00743 moles of phthalic anhydride (co-eluting agent), continue the reaction for one hour, cool down to -28°C, add 0.401 moles of titanium tetrachloride dropwise, and gradually heat up to 85°C. At 80°C, add 0.002 mol of compound A (the first inner electron compound) and 0.006 mol of 2,4-pentanediol dibenzoate (the second inner electron compound), keep the temperature for one hour, filter, and wash the solid twice with toluene , and then added 0.365 moles of titanium tetrachloride and 60 ml of toluene, kept at 110° C. for 0.5 hours and filtered, and repeated this operation; then the obtained soli...

Embodiment 2

[0162] The preparation method of the solid catalyst in Example 2 is the same as in Example 1, except that the amount of compound A is 0.0005 mol, and it is added in the toluene titanium tetrachloride treatment step, and its composition is shown in Table 1.

[0163] The propylene homopolymerization method of Example 2 is the same as that of Example 1, except that the catalyst component of Example 2 is used, and the data are shown in Table 2.

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Abstract

The invention relates to a solid catalyst component for olefin polymerization, an olefin polymerization catalyst and application thereof, wherein the solid catalyst component comprises magnesium, titanium, halogen and an internal electron donor, the internal electron donor comprises a first internal electron donor compound and a second internal electron donor compound, the first internal electrondonor compound is represented by a formula A, and the second internal electron donor compound is a diol ester compound. By introducing cyclotriveratryl hydrocarbon shown as the formula A or a derivative thereof into an olefin polymerization catalyst component, the activity of the catalyst under a high-hydrogen condition can be effectively improved, the hydrogen regulation sensitivity of the catalyst can be further improved, and the catalyst can still keep relatively high isotacticity under the high-hydrogen condition.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, and in particular relates to a solid catalyst component for olefin polymerization, an olefin polymerization catalyst and applications thereof. Background technique [0002] It is well known that when solid titanium-based catalyst components based on magnesium, titanium, halogen and electron donor compounds are used for olefin polymerization, due to the effect of internal electron donor compounds on polymerization activity, polymer isotactic index, molecular weight and molecular weight distribution And other important indicators play a decisive role, so the development of electron donor compounds has extraordinary significance for the replacement of catalysts. [0003] At present, domestic and foreign research on internal electron donors mainly focuses on fatty acid esters and aromatic ester compounds such as patent CN85100997A and its derivative patents; diethers and diketones such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649
CPCC08F10/00C08F110/06C08F4/6494
Inventor 付梅艳黄庭岑为郭子芳周俊领孙竹芳林洁李昌秀高明智张晓帆赵惠张军辉严立安
Owner CHINA PETROLEUM & CHEM CORP