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Process for preparing MgC12-ol-organic complexing agent as spherical carrier of catalyst

A technology of organic complexing agent and catalyst carrier, which is applied in the field of preparation of spherical catalyst carrier MgCl2-alcohol-organic complexing agent complex, which can solve the problems of poor catalyst performance and other problems

Inactive Publication Date: 2004-10-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent USP4,399,054 discloses a method for preparing a magnesium chloride alcoholate carrier by spraying or high-speed stirring dispersion of a magnesium chloride alcoholate melt in a dispersion medium, and then molding it in a cold bath. The carrier obtained by this method is made Catalyst performance is not very good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A 250ml glass three-necked bottle is equipped with a reflux condenser, a mechanical stirrer and a thermometer, add 11.1ml of absolute ethanol, 6.5g of anhydrous magnesium chloride (the mol ratio of absolute alcohol to anhydrous magnesium chloride is 2.8: 1), stir and heat up After the anhydrous magnesium chloride is completely dissolved, add 0.02ml of DIBP, 25ml of liquid paraffin and 25ml of methyl silicone oil, stir at 650 rpm for pre-dispersion, and raise the temperature to 120°C for 15 minutes. Then, 35ml of liquid paraffin and 35ml of methyl silicone oil preheated to 120°C were quickly added to the previous mixture, stirred and dispersed at a speed of 1000 rpm for 25 minutes. The resulting material was quickly transferred to a 500 ml three-necked bottle pre-added with 300 ml of hexane and pre-cooled to -20°C, and stirred at a low speed for 5 minutes. filtered, washed several times with hexane, and dried in vacuo to obtain MgCl 2 -alcohol-organic complexing agent c...

Embodiment 2

[0019] The rest of the preparation conditions were the same as in Example 1 except that the stirring speed was reduced from 1,000 rpm to 700 rpm when adding an inert medium at 120° C. for dispersion. The results are listed in Table 1.

Embodiment 3

[0021] Except that the amount of absolute ethanol added was 11.9ml, the rest of the preparation conditions were the same as in Example 2. The results are listed in Table 1.

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Abstract

A spherical MgCl2-alcohol-organic complexing agent composition as the carrier of catalyst is prepared through sublimation reaction of anhydrous MgCl2 on alcohol to obtain a molten mixture, adding organic complexing agent, low speed stirring in the mixture of methylsilica oil and atoleine, quick cooling, washing and drying.

Description

technical field [0001] The present invention is about carrier MgCl used for α-olefin homopolymerization and copolymerization spherical catalyst 2 - Preparation method of alcohol-organic complexing agent complex. Background technique [0002] There have been a large number of patent literature reports on using magnesium halide to support titanium tetrahalide as an olefin polymerization catalyst, such as: USP4,111,835 (spray method), USP4,399,054 (spray method) and CN1091748A (high-speed stirring method). Especially when spherical magnesium chloride is used as a carrier, a spherical granular catalyst can be prepared, and this spherical granular catalyst can synthesize a spherical olefin polymer that is similar in shape to the catalyst, has good fluidity and bulk density, and does not need to be pelletized , so this kind of catalyst has high industrial application value. The key to obtaining such spherical catalysts is to obtain spherical MgCl 2 . ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/02
Inventor 王立叶朝阳江山马振利范志强
Owner ZHEJIANG UNIV
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