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Spherical magnesium halide adduct and preparation method and application thereof

A magnesium halide and adduct technology, applied in the direction of magnesium organic compounds, etc., can solve the problem that the isotacticity needs to be further improved

Active Publication Date: 2012-11-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of the adduct carrier, it is easy to form special-shaped materials (such as oblate spherical particles, strip particles, etc.), and when the catalyst prepared by the carrier is used for propylene polymerization under high hydrogen concentration, its stereospecificity, especially The isotacticity of polymers with high melt index needs to be further improved

Method used

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  • Spherical magnesium halide adduct and preparation method and application thereof
  • Spherical magnesium halide adduct and preparation method and application thereof
  • Spherical magnesium halide adduct and preparation method and application thereof

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preparation example Construction

[0044] The present invention also provides a method for preparing the spherical magnesium halide adduct, the method comprising:

[0045] (1) MgXY is mixed with alcohol and compound E and heated to obtain a liquid magnesium halide adduct;

[0046] (2) emulsifying the liquid magnesium halide adduct in the presence of an inert liquid medium, and rapidly cooling the emulsified product to obtain spherical magnesium halide adduct particles,

[0047] In MgXY, X is chlorine or bromine, Y is chlorine, bromine, C 1 -C 14 Straight chain or branched chain alkyl, C 6 -C 14 Substituted or unsubstituted aryl, C 1 -C 14 straight-chain or branched-chain alkoxy and C 6 -C 14 One of the substituted or unsubstituted aryloxy groups;

[0048] Described alcohol is general formula R (OH) r The compound shown, R in the general formula is C 1 -C 20 Hydrocarbyl, r is an integer greater than 1;

[0049] Compound E is a hydroxybenzoic acid compound or a hydroxybenzoate compound shown in formul...

Embodiment 1

[0082] This example is used to illustrate the spherical magnesium halide adduct and its preparation method according to the present invention.

[0083] In a 500mL reactor, add 150mL of white oil, 30g of magnesium chloride, 50mL of absolute ethanol and 1mL of ethyl 2-hydroxybenzoate, and raise the temperature to 120°C while stirring. After 2 hours of constant temperature reaction, the mixture was pressed into 300 mL of methyl silicone oil preheated to 120° C., and stirred at high speed (1600 rpm) for 30 minutes to disperse for emulsification. Then, the emulsified product was injected into 2 L of hexane pre-cooled to -30° C. with nitrogen pressure to solidify and form. The liquid was removed by filtration, the solid was washed 5 times with 300 mL of hexane, and dried in vacuo to obtain a spherical magnesium halide adduct. The composition of this magnesium halide adduct is: Mg=10.9wt%, ethanol=55.7wt%, 2-hydroxybenzoic acid ethyl ester=1.43wt%, adopt the particle morphology of o...

Embodiment 2

[0085] This example is used to illustrate the application of spherical magnesium halide adducts according to the present invention in the preparation of olefin polymerization catalysts.

[0086] (1) In a 300mL glass reaction flask, under nitrogen protection conditions, add 18mL of hexane and 90mL of titanium tetrachloride successively, cool to -20°C, add 8.0g of the spherical magnesium halide adduct prepared in Example 1, and Stirring was maintained at -20°C for 30 minutes. Afterwards, the temperature was slowly raised to 110° C., and 1.5 mL of diisobutyl phthalate was added during the temperature rise. After reacting at a constant temperature of 110° C. for 30 minutes, the liquid was filtered off. Add 80 mL of titanium tetrachloride, raise the temperature to 120° C., and filter the liquid after maintaining at 120° C. for 30 minutes; repeat the above operation once. Finally, the obtained solid was washed 5 times with 60° C. hexane (the amount of hexane was 80 mL / time); and t...

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Abstract

The invention provides a spherical magnesium halide adduct and a preparation method thereof, and application of the spherical magnesium halide adduct to preparation of an olefin polymerization catalyst. The spherical magnesium halide adduct is shown as MgXY-mR(OH)r-nE and has a good particle shape, special-shaped materials do not exist, and particles are not adhered. The olefin polymerization catalyst prepared by taking the spherical magnesium halide adduct as a carrier has high hydrogen regulation sensitivity and stereospecificity when used for olefin (particularly propylene) polymerization.

Description

technical field [0001] The invention relates to a spherical magnesium halide adduct, a preparation method and application thereof. More specifically, it relates to a spherical adduct containing multiple components of magnesium halide, alcohol and hydroxybenzoic acid compound or hydroxybenzoic acid ester compound, the preparation method of the adduct and its use in the preparation of olefin polymerization catalysts application. Background technique [0002] Spherical magnesium halide adducts and their use as supports in the preparation of olefin polymerization catalysts are well known in the art. The adduct reacts with a titanium halide and an electron donor compound to obtain a spherical catalyst. When the obtained catalyst is used for the polymerization of olefins (especially propylene), it has high polymerization activity and stereospecificity, and the obtained polymer also has Better particle morphology and higher apparent density. [0003] Most of the disclosed magnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F3/02C08F4/02C08F10/00
Inventor 张纪贵夏先知刘月祥赵瑾高富堂谭扬高平李威莅彭人琪乔素珍凌永泰张志会段瑞林
Owner CHINA PETROLEUM & CHEM CORP
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