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Load-type alkene catalyst and preparation and application thereof

A catalyst, supported technology, applied in the application of the catalyst in olefin polymerization, supported olefin polymerization catalyst and its preparation, titanium compounds containing azabenzene, can solve the problem of low bulk density, high content of fine powder, polymerization Solve problems such as poor ethylene form, and achieve the effect of high bulk density and good particle form

Active Publication Date: 2011-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst can catalyze ethylene polymerization to obtain polyethylene with a wide relative molecular mass distribution, but the catalyst carrier used is amorphous magnesium chloride, so the obtained polyethylene has poor morphology, low bulk density and high fine powder content

Method used

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  • Load-type alkene catalyst and preparation and application thereof
  • Load-type alkene catalyst and preparation and application thereof
  • Load-type alkene catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0020] The preparation method of the catalyst of the present invention includes the following steps:

[0021] (1) Preparation of MgCl 2 / SiO 2 Carrier: Anhydrous MgCl 2 Suspended in organic solvent, add ROH at 30~110℃ to make anhydrous MgCl 2 Dissolve completely, add SiO 2 Fully stir the reaction and dry at 50~110℃ to obtain MgCl 2 / SiO 2 Carrier,

[0022] (2) Carrier treatment: take the MgCl prepared in step (1) 2 / SiO 2 The carrier is dispersed by adding an inert hydrocarbon, and then treated with an organoaluminum compound, the solid obtained after the treatment is dried, and the content of -OH in the carrier obtained after drying is 1.0-5.0% by mass,

[0023] (3) Load the active component: Suspend the carrier in an inert hydrocarbon after drying in step (2), add the pyridine-2-alkylimine titanium tetrachloride of formula (I) to the methyl chloride solution to fully react, and then The solid is washed with inert hydrocarbon and dried.

[0024] In the above preparation method, step ...

example 1

[0044] The catalyst active component used in the present invention is prepared.

[0045] 10mmol of 2,6-diisopropylaniline (Sweden, Company) was dissolved in 20mL methanol, and 10mmol of 2-pyridinecarboxaldehyde (Sweden, Company), then add 5 drops of formic acid. Heat to 65°C and reflux for 3 hours, cool to 25°C, remove the solvent under reduced pressure, cool the obtained solid to -50°C, wash twice with 10mL-30°C ethanol, and dry under reduced pressure at 30°C to obtain 1.8 g of N -(2,6-Diisopropylphenyl)pyridine-2-carboximine, dissolve the resulting product with 30mL of dichloromethane, add 0.74mL of TiCl at 10°C 4 The reaction was stirred for 0.5 hours, the solvent was distilled off and dried to obtain 3.0 g of N-(2,6-diisopropylphenyl)pyridine-2-methylimine titanium tetrachloride.

example 2

[0047] The pyridine-2-alkylimine titanium tetrachloride was prepared according to the method of Example 1, except that 2,6-dimethylaniline was reacted with 2-pyridinecarbaldehyde to obtain 1.5 g of N-(2,6-di Methylphenyl) pyridine-2-methimine, dissolved in dichloromethane and mixed with 0.72mL of TiCl 4 The reaction was stirred to obtain 2.6 g of N-(2,6-dimethylphenyl)pyridine-2-methylimine titanium tetrachloride.

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Abstract

The invention relates to a load-type alkene polymerization catalyst. The load-type alkene polymerization catalyst comprises a MgCl2 / SiO2 carrier, fatty alcohol with a general formula of ROH, an organic aluminum compound and pyridine-2-alkyl imine titanium tetrachloride shown as a formula (I), wherein in the formula (I), R1 and R2 are a single substituted group or multi-substitute groups of a pyridine ring and an aniline ring and are selected from hydrogen, alkyl of C1 to C6, phenyl and aralkyl of C7 to C8 respectively; R3 is selected from hydrogen and alkyl of C1 to C3; R of ROH is selected from alkane of C2 to C8; the magnesium content of the catalyst is between 2 and 15 mass percent; the -OH content is between 0.1 to 5.0 mass percent; the aluminum content is between 0.01 to 5.0 mass percent; and the titanium content is between 0.5 and 8.0 mass percent. The catalyst is used for alkene polymerization and has high polymerization reactivity; and a prepared polymer has high bulk density,wide distribution of relative molecular mass and high melt flow ratio.

Description

Technical field [0001] The present invention is a supported olefin polymerization catalyst and its preparation and application. Specifically, it is a titanium compound whose active component is a nitrogen-containing benzene in a ligand, and the carrier contains SiO 2 Supported olefin polymerization catalyst, preparation method thereof, and application of the catalyst in olefin polymerization. Background technique [0002] In the processing of polyolefin materials, the relative molecular mass and its distribution have a great influence on the properties of polyethylene. The relative molecular mass is large, the mechanical properties are good, but it is not easy to process, the relative molecular mass is small, the processing performance is excellent, but the mechanical properties are poor. The polyethylene product with bimodal or broad-peak relative molecular mass distribution contains part of polyethylene with higher relative molecular mass and part of polyethylene with lower rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/76C08F10/00
Inventor 林伟国荣峻峰毛国芳于鹏黄绪耕周旭华张巍
Owner CHINA PETROLEUM & CHEM CORP