Loaded olefin polymerization solid catalyst ingredient, and preparation method and application thereof

A solid catalyst, olefin polymerization technology, applied in the field of olefin polymerization solid catalyst components and preparation, can solve the problems of large relative molecular weight, low melt index, high melt index, etc., and achieve good bulk density, good shape and high hydrogen regulation The effect of sensitivity

Active Publication Date: 2012-10-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relative molecular mass and its distribution have a great influence on the performance of polyethylene. The relative molecular mass is large and the melt index is low, and its mechanical properties are good, but it is not easy to process; poor

Method used

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  • Loaded olefin polymerization solid catalyst ingredient, and preparation method and application thereof
  • Loaded olefin polymerization solid catalyst ingredient, and preparation method and application thereof
  • Loaded olefin polymerization solid catalyst ingredient, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The preparation method of solid catalyst component provided by the invention comprises the following steps:

[0018] (1) Prepare the active component solution: dissolve the pyridine-2-alkylimine compound shown in the formula (II) in the halogenated alkane, add TiCl 4 , the pyridine-2-alkylimine compound and TiCl 4 The molar ratio is 1:1.1~15.0,

[0019]

[0020] In formula (II), R 1 , R 2 Respectively, the single or multiple substituents on the pyridine ring and the aniline ring are selected from hydrogen, C 1 ~C 6 Alkyl, phenyl or C 7 ~C 8 Aralkyl, R 3 selected from hydrogen or C 1 ~C 3 the alkyl,

[0021] (2) Preparation of catalyst: Fully dissolve the magnesium-containing compound with the general formula ClMg(OR) n(ROH) in halogenated alkanes, add activated SiO 2 , fully impregnated, after impregnating, add the active component solution prepared in step (1) to the impregnated solid and impregnate again, the gained solid is washed and dried with inert h...

example 1

[0049] Preparation of the magnesium-containing compound carrier used in the catalyst of the present invention.

[0050] Get 1.0g (41.7mmol) magnesium powder, put into there-necked bottle under nitrogen protection, add 0.1g I 2 and 60mL (80g) CH 2 Cl 2 , stirred at 41° C. for 5 minutes, and slowly added dropwise 5 mL (86.1 mmol) of ethanol, the reaction proceeded violently and produced a large number of bubbles. After the dropwise addition was completed, the reaction was stirred at this temperature for 10 hours until the magnesium powder was completely reacted. The reaction product was cooled to 25° C. to obtain a colorless transparent solution, and 60 mL of hexane was added with stirring, and white crystals were precipitated, and the stirring was continued for 60 minutes. Filter and dry the solid at 25°C to obtain a white powdery crystal, which is carrier A, and its expression is ClMg(OC 2 h 5 )·0.63(C 2 h 5 OH).

[0051] The contents of each component of the carrier A...

example 2

[0053] The carrier was prepared in the same manner as in Example 1, except that 60 mL (89 g) of CHCl 3 instead of CH 2 Cl 2 , and react magnesium powder with ethanol at 61°C to obtain carrier B, whose expression is ClMg(OC 2 h 5 )·0.81(C 2 h 5 OH), the content of each component of carrier B is: Mg, 16.67 mass %; Cl, ​​20.92 mass %; (OC 2 h 5 ), 56.40% by mass.

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Abstract

The invention discloses a loaded olefin polymerization solid catalyst ingredient, comprising a composite carrier SiO2 and a magnesium-containing compound of ClMg(OR)-n(ROH), and pyridine-2-alkyl imine titanium tetrachloride of formula (I) and TiCl4, wherein in the ClMg(OR)-n(ROH), R is selected from C1-C4 alkyl, n ranges from 0.1-1.0; in the formula (I), R1 and R2 are respectively monosubstituents or polysubstituents on pyridine ring and aniline ring and respectively selected from hydrogen, C1-C6 alkyl, phenyl or C7-C8 aralkyl, R3 is selected from hydrogen or C1-C3 alkyl, and the catalyst comprises 1.0-8.0 wt% of magnesium, 0.2-5.0 wt% of titanium, 0.1-0.9 wt% of nitrogen, and 40-80 wt% of SoO2. The catalyst used in olefin polymerization has good hydrogen response, and the obtained polymer has good form and bulk density and high melt index.

Description

technical field [0001] The invention relates to a supported olefin polymerization solid catalyst and its preparation and application, specifically, a TiCl 4 and titanium complexes as active components, and the carrier contains SiO 2 The olefin polymerization solid catalyst component and its preparation method and application. Background technique [0002] In the olefin polymerization process, hydrogen is used as a chain transfer agent and chain terminator for olefin polymerization, and is usually used as a regulator of the relative molecular weight of polyolefins. By changing the amount of hydrogen used in the polymerization process, the relative molecular weight of the polymer can be adjusted. Therefore, the hydrogen tuning performance of olefin polymerization catalysts is an important indicator of the comprehensive performance of catalysts. [0003] During the processing of polyolefin materials, the melt index of the polymer is one of the important indicators to investig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/02C08F4/658C08F4/656C08F4/654
Inventor 林伟国荣峻峰毛国芳于鹏
Owner CHINA PETROLEUM & CHEM CORP
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