Catalyst system for alkene polymerization reaction

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalyst system and can solve the problems of different polymer properties

Active Publication Date: 2014-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many compounds are known to act as external electron donors, the use of different external electron donor compounds for a particular catalyst may result in different polymer properties

Method used

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  • Catalyst system for alkene polymerization reaction
  • Catalyst system for alkene polymerization reaction
  • Catalyst system for alkene polymerization reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation of diol ester compound 2,4-pentanediol dibenzoate

[0061] (1) Preparation of 2,4-pentanediol

[0062] A mixture of 10g of 2,4-pentanedione and 30ml of methanol was added dropwise to a mixed solution of 2.5g of sodium borohydride, 0.1g of sodium hydroxide and 25ml of water at 0-10°C. After the addition, the solvent was removed under reduced pressure and extracted continuously with 40ml of ethyl acetate for 15h. The solvent was removed and column chromatography was used to obtain 2,4-pentanediol as a colorless liquid with a yield of 90%.

[0063] (2) Preparation of 2,4-pentanediol dibenzoate

[0064] Add 30ml tetrahydrofuran and 0.09mol pyridine to 0.03mol 2,4-pentanediol, add 0.075mol benzoyl chloride under stirring, and heat to reflux for 4h. After cooling, add 20ml of saturated brine, extract with ethyl acetate, anhydrous Na 2 SO 4 Dry and remove solvent. Column chromatography or vacuum distillation gave colorless liquid 2,4-pentanediol dibenzoate with...

Embodiment 2

[0077] 2A, preparation of titanium-containing solid catalyst component A

[0078] Add 100ml of titanium tetrachloride to a 300ml stirring glass reaction bottle fully replaced by high-purity nitrogen, cool to -20°C, add spherical magnesium chloride alcoholate (see Chinese patent CN1330086A for the preparation method), and slowly raise the temperature in stages To 110°C, add 2.5mmol of 2,4-pentanediol dibenzoate and 3.9mmol of dibutyl phthalate prepared in Example 1 during the heating process, and filter off after keeping the temperature at 110°C for 0.5h The liquid was treated twice with titanium tetrachloride, washed five times with hexane, and vacuum-dried to obtain titanium-containing solid catalyst component A (main catalyst).

[0079] 2B, bulk homopolymerization of propylene

[0080] In a 5-liter autoclave, use a nitrogen stream to purge at 70°C for 1 hour, then replace the polymerization vessel 3 times with gas-phase propylene, and introduce 5 ml of a hexane solution of ...

Embodiment 3～10

[0093] The polymerization results obtained by compounding the solid catalyst prepared in 2A of Example 2 according to the method of propylene polymerization in 2B of Example 2 according to different amounts of hydrogenation and different additions of external electron donors. Polymerization and test results are shown in Table 1 and Table 2, respectively.

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Abstract

The invention relates to a catalyst system for alkene polymerization reaction. According to the invention, a spherical titanium-containing solid catalyst component using polyol ester compounds and pthalic acid ester compounds as internal electron donors is added with trioxyl benzoate compounds and hydrocarbyl dialkyl alkoxysilane compounds used as external electron donor compounds during the alkene polymerization, thereby further improving the molecular weight of polymers and widening molecular weight distribution of polymers. The widened molecular weight distribution is relatively excellent for subsequent processing application of the polymers. The copolymer obtained by compounding technology can improve the xylene soluble substance in the case that the ethylene content is basically unchanged, which indicates that the content of rubber phase in the copolymer is improved; in addition, the copolymer obtained can improve the toughness of the copolymers in the case that the rigidity is basically unchanged.

Description

technical field [0001] The present invention relates to a kind of catalyst that is used for olefin polymerization reaction, relate to a kind of compound that comprises spherical catalyst component, cocatalyst and trihydrocarbyloxybenzoate compound and hydrocarbyl dihydrocarbyloxysilane compound as Catalytic systems for olefin polymerization with external electron donor compounds. technical background [0002] As we all know, the catalyst system used in the homopolymerization or copolymerization of α-olefins generally consists of three parts, which are: (1) main catalyst (solid catalyst), (2) cocatalyst (usually alkyl aluminum compounds) and (3) an external electron donor compound added during polymerization. [0003] The use of one or several external electron donor compounds to control the stereoregularity and morphology of polymers during polymerization is well known to those skilled in the art. In addition to affecting the stereoregularity of the polymer, the external e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646
Inventor 张天一夏先知林洁张志会段瑞林万真马长友
Owner CHINA PETROLEUM & CHEM CORP
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