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Catalyst composition and use thereof in selective hydrogenation of conjugated diene latex

A conjugated diene and catalyst technology, applied in the field of selective hydrogenation of conjugated diene latex, catalyst composition, can solve the problems of low conversion rate, slow hydrogenation reaction rate, inconvenience, etc.

Pending Publication Date: 2020-06-26
山东京博中聚新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the solution hydrogenation method, the latex needs to be dehydrated into a solid first, and then dissolved in an organic solvent, which is very inconvenient in industrial production
[0006] The current methods of direct hydrogenation of diene-based polymer latex inevitably have the problems of slow hydrogenation reaction rate, low conversion rate, and gel formation during the reaction process.

Method used

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  • Catalyst composition and use thereof in selective hydrogenation of conjugated diene latex
  • Catalyst composition and use thereof in selective hydrogenation of conjugated diene latex
  • Catalyst composition and use thereof in selective hydrogenation of conjugated diene latex

Examples

Experimental program
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Effect test

Embodiment 1

[0131] A 300 mL polytetrafluoroethylene high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A Nandi butadiene-acrylonitrile polymer latex having an acrylonitrile content of about 30% by weight and a Mooney viscosity (ML1+4@100°C) of 50 was used. The solids content of the latex was 25.7% by weight. Charge 50 mL of latex, 0.00231 g of Heveda-Grubbs II into the reactor, then add 50 mL of latex, and then add 2 g of sodium dodecylbenzenesulfonate. Then use hydrogen to degas the latex. The degassing temperature is 25°C, the degassing pressure is 2Mpa, the degassing time is 60min, and the stirring speed during degassing is 200rpm. After the degassing is completed, continue to stir for 4h to facilitate the full dispersion of the catalyst. For activation, the temperature was raised to 90° C., the hydrogen pressure was raised to 800 psi (5.52 MPa), and the reaction was carried out for 4 hours. After the reaction, the hydroge...

Embodiment 2

[0134] A 300 mL polytetrafluoroethylene high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A Nandi butadiene-acrylonitrile polymer latex having an acrylonitrile content of about 30% by weight and a Mooney viscosity (ML1+4@100°C) of 50 was used. The solids content of the latex was 25.7% by weight. Charge 50 mL of latex, 0.00231 g of Heveda-Grubbs II into the reactor, then add 50 mL of latex, and then add 10 g of sodium dodecylbenzenesulfonate. Then use hydrogen to degas the latex. The degassing temperature is 25°C, the degassing pressure is 2Mpa, the degassing time is 60min, and the stirring speed during degassing is 200rpm. After the degassing is completed, continue to stir for 4h to facilitate the full dispersion of the catalyst. For activation, raise the temperature to 90°C, raise the hydrogen pressure to 800psi (5.52MPa), and react for 2h. After the reaction, the hydrogenated NBR latex was coagulated with ethan...

Embodiment 3

[0138]A 300 mL polytetrafluoroethylene high pressure reactor (Parr Instruments) with temperature control, stirrer and hydrogen addition point was used. A Nandi butadiene-acrylonitrile polymer latex having an acrylonitrile content of about 30% by weight and a Mooney viscosity (ML1+4@100°C) of 50 was used. The solids content of the latex was 25.7% by weight. Charge 50 mL latex, 0.000257 g Hevida-Grubbs II into the reactor, then add 50 mL latex, then add 2 g sodium dodecylbenzenesulfonate. Then use hydrogen to degas the latex. The degassing temperature is 25°C, the degassing pressure is 2Mpa, the degassing time is 60min, and the stirring speed during degassing is 200rpm. After the degassing is completed, continue to stir for 4h to facilitate the full dispersion of the catalyst. For activation, the temperature was raised to 90°C, the hydrogen pressure was raised to 800psi (5.52MPa), and the reaction was carried out for 6h. After the reaction, the hydrogenated NBR latex was coagu...

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Abstract

The invention provides a catalyst composition, which comprises a VIII group metal compound catalyst shown as formula I and an auxiliary agent, wherein the auxiliary agent is sodium dodecyl benzene sulfonate. The catalyst system provided by the invention can realize effective hydrogenation of latex, can significantly reduce the use amount of the catalyst, improve the catalytic efficiency and reducethe industrial cost by adding a small amount of the auxiliary agent, has no participation of an organic solvent in the reaction process, and is beneficial to green chemical industry. The reaction rate of the reaction system is increased, the usage amount of the catalyst is low, the cost can be reduced, the reaction conditions are mild, the reaction efficiency is high, and rapid industrializationis facilitated.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst composition and its application for selective hydrogenation of conjugated diene latex. Background technique [0002] The research and development of hydrogenated diene-based rubber products mainly refers to obtaining rubber products with required properties through formula design and subsequent processing methods according to the application environment of rubber parts. At present, whether in the laboratory or in industrial production, there are mainly three ways to prepare hydrogenated diene-based rubber. Hydrogenated parent diene-based unsaturated polymers, such as nitrile rubber prepared by polymerization of acrylonitrile and butadiene (also known as for NBR). [0003] Among them, the acrylonitrile-ethylene copolymerization method and the emulsion hydrogenation method are still in the laboratory research stage, and there is no precedent for industrial application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C08F8/04C08F236/12
CPCB01J31/1815B01J31/2208C08F8/04B01J2231/645B01J2531/821C08F236/12
Inventor 潘小燕王辉周德芳王传奇王耀伟程烨佟伟超王勇曹峰王英超郝福兰赵而英刘晓东牟庆平黎艳艳栾波
Owner 山东京博中聚新材料有限公司
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