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Adduct of magnesium halides, preparation method, and application

A technology of magnesium halides and adducts, which is applied in the application field of preparing olefin polymerization catalysts, can solve the problems of easy stickiness, difficulty in forming spherical particles of small and large sizes, unsatisfactory problems, etc., and achieve high hydrogen adjustment sensitivity, The effect of reducing fine powder and uniform distribution of active centers

Active Publication Date: 2007-10-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the composite spherical carrier is easily sticky during the preparation process, it is difficult to form spherical particles with a suitable particle size. The size of the disclosed spherical carrier is D50: 70-200, and its catalytic activity for propylene polymerization is only 406gPP / gcat, so not yet satisfactory
[0005] In addition, when the catalyst prepared by the above-mentioned magnesium chloride alcoholate carrier is used for the polymerization of propylene, the sensitivity to hydrogen adjustment is not ideal, so it cannot meet the requirements of industrial production of polypropylene.

Method used

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  • Adduct of magnesium halides, preparation method, and application
  • Adduct of magnesium halides, preparation method, and application

Examples

Experimental program
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Embodiment 1

[0040] In a 1L autoclave, add 110ml of white oil, 220ml of silicone oil, 15g of magnesium chloride, 28ml of ethanol and 4ml of dimethoxypropane, raise the temperature to 125°C with stirring, and stir at 125°C for 3 hours. In 3 L of hexane cooled to -30°C, the liquid was filtered off, the solid was washed three times with hexane, and dried in vacuo to obtain 30.3 g of spherical magnesium chloride adducts with an average particle size of 50 microns.

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, heat up to 100°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, 10mg of spherical catalyst, 5L of hydrogen (standard volume), raise the temperature to 70°C, and polymerize for 1 hour. The test results are shown in Tables 1 and 2.

Embodiment 3

[0047] Same as Example 1 except that it is replaced by 6ml of dimethoxypropane. 31 grams of spherical carriers were obtained, with an average particle diameter of 61 microns.

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Abstract

This invention provides a kind of magnesium halide adducts, whose general chemical formula is MgX2-mROH-nE-pH2O (I), wherein, X is Cl or Br; R is C1-C12 alkyl, C3-C10 cycloalkyl or C6-C10 aryl; E is dialkoxy hydrocarbon compound as shown in formula (II); m is 1-5; n is 0.005-1.0; p is 0-0.8. In formula (II), R1, R2, R3 and R4 are the same or different, and are H or C1-C10 linear or branched alkyl, C3-C10 cycloalkyl, C6-C10 aryl, C7-C10 alkylaryl or arylalkyl; two or more groups of R1 and R2 can bond into one or several fused rings; H is aryl or alkylaryl or H in benzene ring of arylalkyl can be substituted by halogen.

Description

technical field [0001] The invention relates to a magnesium halide adduct, a preparation method and application thereof. More specifically, it relates to a spherical adduct of a ternary component of magnesium halide, alcohol and C, C-dihydrocarbyloxy compound, and the application of the adduct in the preparation of an olefin polymerization catalyst. 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 ...

Claims

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Application Information

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IPC IPC(8): C08F4/02C08F4/06C08F4/42
Inventor 夏先知刘月祥王新生张天一高明智高萍乔素珍尹茂平彭人琪马晶
Owner CHINA PETROLEUM & CHEM CORP
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