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Montmorillonite//MgCl2 composite carrier load alpha-2 imine nickel catalyst, and method for preparing polythene/montmorillonite composite material

A composite carrier, nickel diimide technology, applied in the chemical industry, can solve the problems of poor processing performance and poor heat resistance, and achieve the effects of excellent heat resistance, good stability and high catalytic activity

Inactive Publication Date: 2008-07-16
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented compound helps make plastic products that are resistant against corrosion caused by certain chemical substances like acids or bases used for cleaning them out during manufacturing processes. It also improves its durability when exposed to harsh environments such as extreme temperature conditions over time without losing effectiveness due to decomposition.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving thermal insulation performance (PE) when making nanocompositons made from polyethlene or other thermally stable organopolymers through addition of silicate clay mineral supports that enhance their strength without compromising their flexibility during processing.

Method used

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  • Montmorillonite//MgCl2 composite carrier load alpha-2 imine nickel catalyst, and method for preparing polythene/montmorillonite composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation of embodiment 1 organically modified montmorillonite

[0020] The montmorillonite and a saturated solution of magnesium chloride were stirred for 24 hours at room temperature. Then wash with pure water and suction filter until the filtrate is tested with 1 mol / L silver nitrate solution for no white precipitate, and magnesium-based montmorillonite is obtained. Then, the magnesium-based montmorillonite, hexadecyltrimethylammonium bromide and pure water were stirred at 80° C. for 24 hours, and finally the organically modified montmorillonite was obtained through suction filtration and vacuum drying.

Embodiment 2

[0021] The preparation of embodiment 2 montmorillonite / ethanol-magnesium chloride carrier

[0022] Under the condition of anhydrous and oxygen-free 120°C, stir 5 grams of organically modified montmorillonite, 5 grams of anhydrous magnesium chloride, and 10 milliliters of absolute ethanol for 24 hours until the magnesium chloride is completely dissolved. Add 30 ml of anhydrous n-heptane to recrystallize the reactant, then drain the unreacted n-heptane to obtain a powdery substance. Next, under anhydrous and anaerobic zero-degree conditions, pour 40 milliliters of triethylaluminum n-heptane solution (triethylaluminum concentration is 0.45 g / ml) into the powdery substance, and stir for 24 hours. Then the reaction product was left standing, and the reaction product was washed several times with anhydrous n-heptane. Finally, the remaining n-heptane was drained to obtain the carrier.

Embodiment 3

[0023] Embodiment 3N, the loading of N'-bis-(2,6-dimethyl-phenyl) nickel dichloride complex catalyst

[0024] Will 1×10 -4 The molar N,N'-bis-(2,6-dimethyl-phenyl)nickel dichloride complex was dissolved in 5 ml of anhydrous dichloromethane. The solution was stirred with 2 g of the carrier obtained in Example 2 and 27 ml of anhydrous dichloromethane under anhydrous and oxygen-free conditions of 40° C. for 5 hours. Then the reaction product was allowed to stand, and the supernatant liquid was taken out and poured into anhydrous dichloromethane for washing. Repeated extraction and washing several times in this way until the extracted supernatant became colorless. Finally, the remaining dichloromethane was sucked dry to obtain a supported catalyst. As determined by ICP, the nickel content of the supported catalyst is 0.08%.

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Abstract

The invention discloses an alpha-diketinimatonickel catalyst loaded on a montmorillonite/MgCl2 composite carrier and a method for preparing a polythene/montmorillonite composite material. The preparation method includes that organic improved montmorillonite, anhydrous magnesium chloride, ethanol and triethylaluminum are firstly used for preparing a novel carrier, then N, N' -di-(2, 6- dimethyl-phenyl)-acenaphthenequinonediimine nickelous chloride is loaded on the carrier to form a support-type catalyst, finally, aluminium diethyl monochloride is used as a drier activator to initiate ethylene polymerization so as to prepare the polythene/montmorillonite composite material under different reaction conditions. The novel support-type catalyst of the invention has simple preparation, good stability, and higher catalytic activity; besides, the montmorillonite can be distributed evenly in polythene resin. The polythene/montmorillonite composite material prepared in the invention is characterized by high molecular weight and good heat resistance.

Description

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Claims

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Application Information

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Owner SUN YAT SEN UNIV
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