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Olefine polymerization catalyst, synthesis method and its use

A technology of olefin polymerization and synthesis method, which is applied in the field of synthesis and olefin polymerization catalyst, and can solve the problems such as tridentate nickel complexes that have not been seen

Inactive Publication Date: 2003-06-11
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coordination polymerization of styrene can use IVB, VIII group and rare earth complexes as catalysts, but there is no report on the use of tridentate nickel complexes as styrene polymerization catalysts in literature and patents

Method used

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  • Olefine polymerization catalyst, synthesis method and its use
  • Olefine polymerization catalyst, synthesis method and its use
  • Olefine polymerization catalyst, synthesis method and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment one 2, the preparation of 6-diethyl pyridinedicarboxylate

[0037] Under the protection of nitrogen, dissolve 11g (66mmol) of picolinic acid in 20mL of absolute ethanol, cool in an ice-water bath, and slowly drop into a solution of 12g (63mmol) of p-toluenesulfonic acid, 30mL of absolute ethanol, and 20mL of benzene. Heat to reflux to separate water for 48 hours. After the reaction is complete, spin off most of the solvent, add anhydrous ether, shake and divide into two layers, the upper layer is colorless, and the lower layer is a brownish-red oily liquid. Add solid sodium bicarbonate to neutralize until no bubbles are generated. A large amount of white precipitate appeared, and water was added to dissolve the solid, extracted with ether, the ether layers were combined, dried over anhydrous sodium sulfate, spin-dried, and sucked dry to obtain 12.7 g of white solid, with a yield of 87%. 1H NMR (CDCl3 / TMS, 300 MHz): δ=1.4 (t, J=7.5Hz, 6H); 4.5(q, J...

Embodiment 2

[0038] Example 2 Preparation of 2,6-diacetylpyridine

[0039] Under the protection of nitrogen, add 60mL of absolute ethanol dropwise to 4.75g (200mmol) sodium block, heat to reflux to dissolve the sodium block completely, slowly add dropwise 12.7g (57mmol) diethyl picolinate, 18g (204mmol) acetic acid Ethyl ester in 90mL xylene solution, heat 120-140°C to reflux for 24h, heat up to 160°C to reflux for 36h, add water 40mL, concentrated hydrochloric acid 80mL, oil bath 160°C to reflux for 4h, cool and stand, the solution is separated, the upper organic phase is orange Yellow and transparent, the lower aqueous phase is brown-red turbid, the upper organic phase is separated, dried over anhydrous magnesium sulfate, the solvent xylene is evaporated, the residue is combined with the aqueous phase, refluxed for 4 hours, cooled, neutralized with sodium bicarbonate, extracted with ether, Dry over anhydrous sodium sulfate and purify by column chromatography to obtain 5.8 g o...

Embodiment 3

[0040] Example 3 Preparation of 2,6-diacetylpyridine bis(2,6-diisopropylaniline)

[0041] Under the protection of nitrogen, dissolve 1.5g (9.2mmol) 2,6-diacetylpyridine and 3.3g (18.6mmol) 2,6-diisopropylaniline in 25mL of absolute ethanol, drop a few drops of glacial acetic acid, Refluxed for 24 hours, cooled to room temperature, yellow crystals were precipitated, recrystallized from ethanol, filtered, washed with ethanol, and dried to obtain 3.2 g of yellow solids with a yield of 67%. 1 H NMR (CDCl 3 / TMS, 300MHz): δ=1.2(d, J=6.9Hz, 24H); 2.3(s, 6H); 2.8(sept, J=6.9Hz, 4H); 7.2(m, 6H); 8.0(t, J=7.8, 1H); 8.5 (d, J=7.8, 2H). Mass spectrum (EI): 481 (59.76), 466 (100), 202 (53.37), 467 (36.47), 176 (27.58), 43 (27.47), 186 (25.59), 482 (22.20). IR (KBr) v / cm-1 3059, 2959, 2925, 2867, 1644, 1455, 1365, 1240, 828, 768.

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Abstract

The invention is a styrene or alpha olefine polymerization catalyzer, the synthesizing method and the use. The catalyzer is a pyridyl di-imine back-transition metal suitable matter, synthesized by pyridyl di-imine and back-transition metal compound and can catalyze the polymerization of styrene or alpha-olefine. The product is mainly ruleless polystyrene.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst, a synthesis method and its use in catalyzing olefin polymerization. The catalyst is a new type of late transition metal catalyst of pyridine diimine, which is synthesized from pyridyl diimine and late transition metal compound. It can be used to catalyze the polymerization of styrene or α-olefins and other olefins. Background technique [0002] The appearance of Ziegler-Natta catalyst in the 1850s ushered in a new era of polyolefin industry; while highly active MgCl 2 Catalysts supporting titanium have promoted the development of the polyolefin industry [K.Ziegler et al., Angew.Chem., 1955,67,426; K.Ziegler et al., Angew.Chem.1955,67,541; N.Kashwa et al., USP -3642746, 1968]. The discovery that the catalytic system composed of group IV metallocenes and MAO can synthesize polyolefins with high activity and high stereoregularity is another major breakthrough in the field of olefin polymerizat...

Claims

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Application Information

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IPC IPC(8): C08F4/80C08F10/00
Inventor 张玉良戴厚良郭阳辉蒲晓涛姚小利李晓强唐勇
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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