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Rare earth complex, catalyst, preparation method thereof and preparation method of polybutadiene

A rare earth complex and rare earth catalyst technology, applied in the field of polymers, can solve the problems of strong corrosion of the catalytic system and pollution of the environment, and achieve the effects of rich species, small corrosion and high cis content.

Active Publication Date: 2011-02-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above reports, the neodymium-based catalytic system uses halogen as an essential component, so the catalytic system has a strong corrosion effect and pollutes the environment.

Method used

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  • Rare earth complex, catalyst, preparation method thereof and preparation method of polybutadiene
  • Rare earth complex, catalyst, preparation method thereof and preparation method of polybutadiene
  • Rare earth complex, catalyst, preparation method thereof and preparation method of polybutadiene

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preparation example Construction

[0027] The invention also provides a preparation method of the sulfonic acid rare earth catalyst, which includes:

[0028] Mixing the rare earth trifluoromethanesulfonate compound, the electron donating ligand and the solvent, heating to obtain the rare earth trifluoromethanesulfonate complex, the molar ratio of the rare earth element to the electron donating ligand is 1:3-10;

[0029] The rare earth trifluoromethanesulfonate complex and the alkyl aluminum are mixed to obtain a sulfonate rare earth catalyst, and the molar ratio of the alkyl aluminum to the rare earth element in the rare earth trifluoromethanesulfonate complex is 10-60:1 .

[0030] The above-mentioned rare earth trifluoromethanesulfonate compound is preferably prepared according to the following method:

[0031] The rare earth oxide and trifluoromethanesulfonic acid are mixed, heated to 40-80°C, and reacted for 2-10 hours to obtain a rare earth trifluoromethanesulfonic acid compound. The molar ratio of the rare earth o...

Embodiment 1

[0048] Preparation of Neodymium Trifluoromethanesulfonate

[0049] In the reactor, add neodymium oxide to the trifluoromethanesulfonic acid solution at a molar ratio of 10:1 to neodymium oxide and trifluoromethanesulfonic acid, heat to 70°C under stirring, and react for 8 hours. Unreacted neodymium oxide is removed, the aqueous neodymium trifluoromethanesulfonate is concentrated, and then the concentrated neodymium trifluoromethanesulfonate aqueous solution is placed at room temperature to naturally precipitate crystals, that is, neodymium trifluoromethanesulfonate with crystal water.

Embodiment 2

[0051] Preparation of Lanthanum Triflate

[0052] In the reactor, lanthanum oxide was added to the trifluoromethanesulfonic acid solution at a molar ratio of 10:1 to the lanthanum oxide and trifluoromethanesulfonic acid solution, heated to 70°C under stirring, reacted for 8 hours, filtered, Unreacted lanthanum oxide is removed, the lanthanum triflate aqueous solution is concentrated, and then the concentrated lanthanum triflate aqueous solution is placed at room temperature to naturally precipitate crystals, which is lanthanum triflate with crystal water.

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Abstract

The embodiment of the invention discloses a rare earth complex the molecular formula of which is Ln(CF3SO3)3.xH2O.yL. The invention also provides a rare earth sulfonate catalyst and a preparation method thereof. The rare earth sulfonate catalyst comprises aluminum alkyls and the rare earth complex, wherein the mol ratio of the aluminum alkyls to the Ln is 10-60:1. Besides, the invention also provides a preparation method of polybutadiene. The rare earth sulfonate catalyst provided by the invention has small corrosion behavior, thereby being environment friendly. The rare earth sulfonate catalyst provided by the invention provides a new catalysis system for the field of synthetic rubber. Experimental results indicate that the cis-content of the polybutadiene obtained by using the prepared rare earth sulfonate catalyst in the invention is high and can be up to 97% or above, and the weight-average molecular weight of the prepared polybutadiene is 4*10<5>-20*10<5>.

Description

Technical field [0001] The invention relates to the technical field of polymers, and more specifically to a rare earth complex, a catalyst, a preparation method thereof, and a preparation method of polybutadiene. Background technique [0002] Polybutadiene rubber is an important synthetic rubber obtained by polymerization of 1,3-butadiene as monomer. According to the difference in microstructure, polybutadiene rubber is divided into cis-1,4-polybutadiene rubber, trans-1,4-polybutadiene rubber, syndiotactic-1,2 polybutadiene rubber, Identical-1,2 polybutadiene rubber, random-1,2 polybutadiene rubber, etc. Among them, among polybutadiene rubbers with various microstructures, cis-1,4 polybutadiene rubber has excellent comprehensive properties, low glass transition temperature, high adhesion, high elasticity and high wear resistance. And other characteristics, and the higher the cis structure, the better its performance. [0003] In the preparation process of cis-polybutadiene, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/52C08F136/06C07F5/00
Inventor 代全权乔成莉胡尊燕蔡洪光张春雨范长亮毕吉福那丽华张学全
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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