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Rare earth complex and preparation method thereof, rare earth catalyst system and preparation method of butadiene-isoprene copolymer

A technology of rare earth complexes and rare earth compounds, applied in chemical instruments and methods, compounds containing elements of group 3/13 of the periodic table, organic chemistry, etc., can solve problems such as equipment corrosion and environmental pollution

Active Publication Date: 2013-04-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned rare earth catalytic system requires the presence of halogens in the catalyst aging process, which has a strong corrosion effect on equipment and pollutes the environment.

Method used

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  • Rare earth complex and preparation method thereof, rare earth catalyst system and preparation method of butadiene-isoprene copolymer
  • Rare earth complex and preparation method thereof, rare earth catalyst system and preparation method of butadiene-isoprene copolymer
  • Rare earth complex and preparation method thereof, rare earth catalyst system and preparation method of butadiene-isoprene copolymer

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preparation example Construction

[0034] The present invention also provides a preparation method of the rare earth complex represented by formula (I), including the following steps:

[0035] Mixing rare earth oxide with alkyl benzene sulfonic acid, heating, and obtaining alkyl benzene sulfonic acid rare earth compound after reaction;

[0036] The alkylbenzene sulfonate rare earth compound and the electron donating ligand are dissolved in a solvent, and the rare earth complex as described in formula (I) is obtained after the reaction; the electron donating ligand and the alkylbenzene sulfonic acid rare earth compound are The molar ratio of rare earth elements is (3~10):1.

[0037] According to the present invention, the molar ratio of the rare earth oxide to the alkylbenzene sulfonic acid is preferably 10:1. In the process of obtaining the alkylbenzene sulfonic acid rare earth compound, the heating temperature is preferably 50-80°C, more preferably 60-70°C, and the reaction time is preferably 5-10h, more preferably ...

Embodiment 1

[0050] Example 1: Neodymium tetraalkylbenzene sulfonate Nd(C 10 H 13 SO 3 ) 3 Compound preparation

[0051] In the reactor, add neodymium oxide to the tetraalkylbenzene sulfonic acid solution at a ratio of 10:1 in the molar ratio of neodymium oxide to tetraalkylbenzene sulfonic acid, heat to 80°C under stirring, react for 8 hours, and filter , The unreacted neodymium oxide is removed and concentrated to obtain an aqueous solution of neodymium tetraalkylbenzenesulfonate compound, and then the concentrated solution is placed at room temperature to naturally precipitate crystals, which are tetraalkylbenzenesulfonate rare earth compounds with crystal water.

Embodiment 2

[0052] Example 2: Neodymium octaalkylbenzene sulfonate Nd(C 14 H 21 SO 3 ) 3 Compound preparation

[0053] In the reactor, add neodymium oxide to the octaalkylbenzene sulfonic acid solution in a ratio of 10:1 molar ratio of neodymium oxide to octaalkylbenzene sulfonic acid, and heat to 70°C under stirring, react for 6 hours, and filter , Remove the unreacted neodymium oxide, concentrate to obtain an aqueous solution of neodymium octaalkylbenzenesulfonate compound, and then place the concentrated solution at room temperature to naturally precipitate crystals, which are rare earth octaalkylbenzenesulfonate compounds with crystal water.

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Abstract

The invention provides a rare earth complex shown in formula (I) and a preparation method thereof and a rare earth catalyst system. The invention further provides a preparation method of butadiene-isoprene copolymer. The rare earth catalyst system is used for preparing the butadiene-isoprene copolymer. The rare earth catalyst system comprises alkyl benzene sulfonic acid rare earth complex and aluminum alkyl, so that the catalyst system does not contain halogen and does not have a corrosion action, and is environment friendly during the process of preparing the butadiene-isoprene copolymer. Experimental results show that the content of cis-1,4 in butadiene and isoprene of the butadiene-isoprene copolymer prepared by the rare earth catalyst system is larger than 95%.

Description

Technical field [0001] The invention relates to the technical field of catalysts, in particular to a rare earth complex and a preparation method thereof, and a preparation method of a rare earth catalyst system and a butadiene-isoprene copolymer. Background technique [0002] With the continuous improvement of rubber material varieties and properties, the butadiene-isoprene copolymer rubber copolymerized by butadiene and isoprene has excellent low temperature resistance, abrasion resistance and low temperature rolling. Properties such as resistance have attracted widespread attention. [0003] Coordination catalysts used in the copolymerization of butadiene and isoprene, the transition metals used are mostly Ti, Co, Ni and other elements. This type of catalyst system has a higher content of cis-1,4 for butadiene homopolymerization, while The content of isoprene homopolymer cis-1,4 is low, but the 1,4 link of the copolymer obtained by copolymerization of butadiene and isoprene is n...

Claims

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Application Information

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IPC IPC(8): C07F5/00C08F4/54C08F4/52C08F236/08
Inventor 代全权张学全白晨曦张春雨张贺新毕吉福那丽华于琦周
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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