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Olefin polymerizing catalyst, preparation and use thereof

A technology for olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalyst and its preparation and application, and can solve problems such as poor stereo orientation

Active Publication Date: 2008-12-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

USP4,298,718 and USP4,495,338 proposed the use of active magnesium halide as the carrier of Ziegler-Natta catalyst for the first time, and the catalyst formed by the action of the carrier and titanium tetrachloride showed high activity in propylene polymerization, but poor stereospecificity

Method used

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  • Olefin polymerizing catalyst, preparation and use thereof
  • Olefin polymerizing catalyst, preparation and use thereof
  • Olefin polymerizing catalyst, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0156] Add 45mL of anhydrous hexane and 15g of anhydrous MgCl to a 250mL three-necked flask in sequence 2 , 144mL of anhydrous n-butanol, hexane was distilled off, and the temperature was lowered to ambient temperature (about 10°C) to obtain a uniform colorless and transparent solution. The prepared MgCl 2 - Add the n-butanol solution to a 500 mL three-neck flask containing 100 mL of paraffin oil and 0.32 g of sorbitan trioleate, and stir at a speed of 1000 rpm for 30 minutes to obtain a stable white emulsion. The temperature is controlled at about 35°C, and 26mL of 5M SiCl is slowly added dropwise over 40 minutes 4 - Solution in hexane, heated to 50°C for 1 hour. Cool, settle, and filter out the paraffin oil in the upper layer. Wash with a total of about 100 mL of anhydrous hexane three times, and drain to obtain 6.3 g of magnesium chloride alcoholate carrier.

[0157] 1.3 g of solid alcoholate carrier and 30 mL of anhydrous heptane were added to a 250 mL three-necked fla...

Embodiment 2

[0160] The method is the same as in Example 1, except that N-methoxyphenyl-bis(trifluoromethanesulfonyl)imide is used as the electron donor to obtain 0.65 g of a solid catalyst with a titanium content of 3.86%. Catalyst activity of 5518 g polymer / g (Ti) hour -1 , Isotacticity 93%.

Embodiment 3

[0162] The method is the same as in Example 1, except that N-phenyl-bis(trifluoromethanesulfonyl)imide is used as the electron donor to obtain 0.49 g of a solid catalyst with a titanium content of 3.95%. Catalyst activity of 11797 g polymer / g (Ti) hour -1 , Isotacticity 90%.

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Abstract

The invention relates to a catalyst used for olefin polymerization, a preparation method and an application thereof. The components of the catalyst comprises an activated magnesium halide (1), a titanium compound (2) that has at least one Ti-halide bond and is loaded on the activated magnesium halide (1), and an electron donor (3) that is chosen from one or a plurality of sulfonyl compounds with a general formula (I). The two preparation methods for the solid catalyst with the components are that: one method comoprises the following steps of processing the grains of the activated magnesium halide (1) with alkyl aluminium, then adding the electron donor (3), processing with the titanium compound (2) solution for one or a plurality of times so as to obtain the catalyst; the other method comprises the following steps of adding spherical grains of magnesium chloride alcoholates and the electron donor (3) into the titanium compound (2) solution in sequence and processing with the titanium compound (2) for one or a plurality of times so as to obtain the catalysis. The catalyst system disclosed by the invention comprises the components of the solid catalyst, a cocatalyst (alkyl aluminium compounds) and an external electron donor.

Description

technical field [0001] The invention relates to a catalyst system for olefin polymerization, its preparation method and its application in catalyzing olefin polymerization. Background technique [0002] The development of high-performance polyolefin resins depends on the continuous improvement of the performance of olefin polymerization catalysts. USP4,298,718 and USP4,495,338 proposed for the first time the use of active magnesium halide as the carrier of Ziegler-Natta catalyst. The catalyst formed by the action of the carrier and titanium tetrachloride showed high activity in propylene polymerization, but poor stereospecificity. Subsequently, researchers have continuously worked hard to improve the performance of the catalyst. GB2,111,066 discloses contacting magnesium chloride alcohol and liquid titanium compound, adding an electron donor (such as phthalate) at the same time to form a solid titanium catalyst, and adding another electron donor when olefins are polymerized...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/643
CPCC08F110/06C08F4/6465C08F4/6567C08F4/6543C08F4/651C08F2500/15
Inventor 义建军崔春明李华姝伊宝作张建颖郎笑梅吴林美
Owner PETROCHINA CO LTD
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