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Magnesium halide adduct, preparation and use thereof

A technology of magnesium halides and adducts, applied in the direction of magnesium organic compounds, etc., can solve the problem of low isotacticity of stereospecific polymers, and achieve the effects of high melt index, reduced fragmentation, and high isotacticity

Active Publication Date: 2009-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the catalyst polymerizes propylene at a high hydrogen concentration, its stereospecificity, especially the isotacticity of the polymer at a high melt index, is relatively low, and needs to be further improved.

Method used

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  • Magnesium halide adduct, preparation and use thereof
  • Magnesium halide adduct, preparation and use thereof
  • Magnesium halide adduct, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of spherical carrier: In a 0.5L autoclave, add 150ml of white oil, 30g of magnesium chloride, 50ml of ethanol and 3ml of o-methoxybenzoyl chloride, heat up to 125°C under stirring, stir at 125°C for 2.5 hours, and dissolve the mixture Put it into silicone oil at 120°C, stir for 45 minutes, then put it into 2L hexane pre-cooled to -30°C to form spherical solid particles, filter off the liquid, wash the solid five times with hexane, and dry in vacuum to obtain 50 g spherical magnesium chloride adduct support. (D50) is 80 microns, and the particle size distribution value (D50 / (D90-D10)) is 1.2.

Embodiment 2

[0042] A. Preparation of Spherical Catalysts

[0043] In a 300ML glass reaction bottle, add 100ml of titanium tetrachloride, cool to -20°C, add 8 grams of the spherical magnesium chloride adduct of Example 1, raise the temperature to 110°C, add diphthalic acid di 1.5 ml of isobutyl ester, the liquid was filtered off, washed twice with titanium tetrachloride, washed three times with hexane, and dried in vacuo to obtain a spherical catalyst.

[0044] B. Propylene Polymerization

[0045] In a 5L autoclave, add 2.5L of propylene, 1mmol of triethylaluminum, 0.05mmol of CHMMS (cyclohexyldimethoxysilane), 10mg of the spherical catalyst obtained above, 1.5L of hydrogen (standard volume), and heat up to 70°C , polymerized for 1 hour. The test results are shown in Tables 1 and 2.

Embodiment 3

[0047] Same as Example 2 except that 5.0 L of hydrogen gas was added during the propylene polymerization.

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Abstract

The invention provides a magnesium halide addition compound shown as general formula MgX2-mROH-nE-pH2O, wherein, X refers to chlorine or bromine, R refers to the alkyl of C1-C12; naphthene base of C3-C10 or the aryl of the C6-C10; E refers to o-alkoxybenzoic ether compound shown in the general formula (II); m ranges from 1 to 5; n ranges from 0.005 to 1.0; and P ranges from 0 to 0.8.

Description

technical field [0001] The invention relates to a magnesium halide adduct, a preparation method and application thereof. Specifically, it relates to a spherical adduct of a ternary component of magnesium halide, alcohol and o-alkoxybenzoic acid ester, and the application of the adduct in the preparation of olefin polymerization catalysts. technical background [0002] Magnesium halide / alcohol adducts and their use as supports in the preparation of olefin polymerization catalysts are well known in the art. The adduct reacts with titanium halide and electron donor compound to obtain a spherical catalyst, which has high polymerization activity and stereoregularity when used in olefin polymerization, especially propylene polymerization, and the obtained polymer also has good particles morphology and higher apparent density. [0003] Most of the disclosed magnesium halide adducts are alcoholates of magnesium chloride, usually including binary components of magnesium chloride an...

Claims

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Application Information

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IPC IPC(8): C07F3/02C08F4/642C08F4/02C08F10/06
Inventor 张纪贵刘月祥夏先知王新生高平乔素珍尹茂平李威莅张天一彭人琪陈颖张志会
Owner CHINA PETROLEUM & CHEM CORP
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