Olefin polymerization catalyst, its production and use

A technology of olefin polymerization and catalyst, applied in the field of catalyst

Active Publication Date: 2006-08-16
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purpose of these patents is to find a catalyst with a balanced activity and hydrogen adjustment ability, or to improve the gelation of the polymer, or to increase the activity of the catalyst, and whether the catalyst system composed of a variety of magnesium compounds can help to broaden the polymer The molecular weight distribution of the

Method used

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  • Olefin polymerization catalyst, its production and use
  • Olefin polymerization catalyst, its production and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Preparation of main component A of titanium-containing catalyst

[0071] At room temperature, add 80 ml of heptane and 0.8 ml of dichloromonoethylaluminum (Al / Mg=0.5mol / mol) to 8 grams of heat-treated silica (Grace Davison955), stir for 1 hour, and then add 17 mL (2mmolMg / gSiO 2 ) Magnesium complex A, after stirring evenly at room temperature, the temperature was raised to 70° C., and the reaction was kept at this temperature for 3 hours. Then cool to normal temperature, and add 2 milliliters of titanium tetrachloride (Ti / Mg=1.1mol / mol), heat up to 85 ℃, keep reacting at this temperature for 3 hours, then wash with heptane, carry out under nitrogen purging After drying, the powdery solid titanium-containing catalyst main component is finally obtained.

Embodiment 2

[0073] Preparation of main component B of titanium-containing catalyst

[0074] At normal temperature, add 80 milliliters of heptane and 1.6 milliliters of dichloromonoethylaluminum (Al / Mg=0.7mol / mol) through heat-treated 10 grams of silicon dioxide (Grace Davison955), stir and react for 1 hour, then add 22 mL (2.2mmolMg / gSiO 2 ) Magnesium complex B, after stirring evenly at room temperature, the temperature was raised to 70°C, and the reaction was kept at this temperature for 3 hours. Then cool to normal temperature, and add 1.2 milliliters of titanium tetrachloride (Ti / Mg=0.5mol / mol), heat up to 85 ℃, keep reacting at this temperature for 3 hours, then wash with heptane, carry out under nitrogen purging After drying, the powdery solid titanium-containing catalyst main component is finally obtained.

Embodiment 3

[0076] Preparation of main component C of titanium-containing catalyst

[0077] At normal temperature, add 80 milliliters of heptane and 2 milliliters of dichloromonoethylaluminum (Al / Mg=0.6mol / mol) to 10 grams of heat-treated silica (Grace Davison955), stir for 1 hour, then add 33 mL (3.2mmolMg / gSiO 2 ) Magnesium complex C, after stirring evenly at room temperature, the temperature was raised to 70° C., and the reaction was kept at this temperature for 3 hours. Then cool to normal temperature, and add 5 milliliters of titanium tetrachloride (Ti / Mg=1.4mol / mol), heat up to 85 ℃, keep reacting at this temperature for 3 hours, then wash with heptane, carry out under nitrogen purging After drying, the powdery solid titanium-containing catalyst main component is finally obtained.

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Abstract

An olefin polymerization catalyst, its production and use are disclosed. The procedure is carried out by reacting magnesium compound with alcohol compound to form mono-magnesium composite, immersing it into carrier silica with halogenating agent, reacting it with titanium compound to obtain final product. It has better catalyst activity and wider polymer molecular weight distribution. It can be used for vinyl homopolymerization and copolymerization.

Description

technical field [0001] The present invention relates to a catalyst for olefin polymerization, a preparation method and application of the catalyst in ethylene polymerization or copolymerization. Background technique [0002] Traditional Ziegler-Natta (Ziegler-Natta) catalysts contain a main catalyst and a co-catalyst. The main catalyst is usually a transition metal element compound of Group IVB of the periodic table of elements, and the most commonly used is a Ti compound. Cocatalysts are usually organoaluminum compounds, commonly used are Al(C 2 h 5 ) 3 , Al(C 2 h 5 ) 2 Cl, Al 2 (C 2 h 5 ) 3 Cl 3 Wait. It has been a century since the advent of polyethylene, and the Ziegler-Natta catalyst used to synthesize polyethylene has been developed for several generations, and its performance has been greatly improved. For example, the birth of supported catalysts improves the polymerization activity of Ziegler-Natta catalysts. [0003] Activated magnesium chloride is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/656C08F4/654C08F4/646
CPCC08F10/00C08F110/02C08F4/6565C08F4/6555C08F4/651C08F2500/12C08F2500/18C08F2500/04C08F2500/24
Inventor 肖明威余世炯叶晓峰
Owner CHINA PETROLEUM & CHEM CORP
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