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Article

Hydrogenation of Carboxyl Nitrile Butadiene Rubber Latex Using a Ruthenium-Based Catalyst

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Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics of Ministry of Education, School of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Yellow River Delta Jingbo Chemical Research Institute Co., Ltd., Binzhou 256500, China
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Research and Development, Shangdong Dongdu Auto Parts Co., Ltd., Rizhao 276800, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Miguel Martínez-Calvo
Catalysts 2022, 12(1), 97; https://doi.org/10.3390/catal12010097
Received: 21 December 2021 / Revised: 8 January 2022 / Accepted: 11 January 2022 / Published: 14 January 2022
(This article belongs to the Special Issue Novel Catalysts for Polyolefin and Synthetic Rubber)
Hydrogenated carboxyl nitrile rubber (HXNBR) is endowed with superior mechanical performance and heat–oxygen aging resistance via emulsion hydrogenation of its precursor, i.e., carboxyl nitrile rubber (XNBR). Herein, a ruthenium-based catalyst was prepared to achieve the direct catalytic hydrogenation of XNBR latex. The effects of a series of hydrogenation conditions, such as catalyst dosage, solid content and reaction temperature, as well as the hydrogen pressure, on the hydrogenation reaction were investigated in detail. We found that the hydrogenation rate fell upon increasing the solid content of the XNBR latex, with an XNBR conversion rate of 95.01 mol% in 7 h with 11.25 wt% solid content. As the reaction temperature was increased, the hydrogenation rate first increased and then decreased. The fastest reaction hydrogenation rate was reached at 140 °C, with an XNBR conversion of 95.10 mol% in 5 h. The hydrogenation rate was positively related with the hydrogen pressure employed in the reactor. In view of the safety and cost, a pressure rate of 1300 psi was considered optimal. Similarly, the hydrogenation rate can also be enhanced by adding more catalyst. When 0.05 wt% catalyst was added, the fastest hydrogenation rate was achieved. In summary, the following optimum hydrogenation conditions were determined by using a synthesized ruthenium-based catalyst: 11.25 wt% solid content of XNBR latex, 140 °C of reaction temperature, 1300 psi of hydrogen pressure and 0.05 wt% catalyst. The vulcanization, mechanical performance, aging resistance and oil resistance of the produced HXNBR under the above reaction conditions were systematically investigated. View Full-Text
Keywords: XNBR catalytic hydrogenation; reaction kinetics; hydrogenation rate; performance testing XNBR catalytic hydrogenation; reaction kinetics; hydrogenation rate; performance testing
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MDPI and ACS Style

Liu, X.; Fu, Y.; Zhou, D.; Chen, H.; Li, Y.; Song, J.; Zhang, S.; Wang, H. Hydrogenation of Carboxyl Nitrile Butadiene Rubber Latex Using a Ruthenium-Based Catalyst. Catalysts 2022, 12, 97. https://doi.org/10.3390/catal12010097

AMA Style

Liu X, Fu Y, Zhou D, Chen H, Li Y, Song J, Zhang S, Wang H. Hydrogenation of Carboxyl Nitrile Butadiene Rubber Latex Using a Ruthenium-Based Catalyst. Catalysts. 2022; 12(1):97. https://doi.org/10.3390/catal12010097

Chicago/Turabian Style

Liu, Xiaodong, Yunlei Fu, Defang Zhou, Hanchu Chen, Yanyan Li, Jianhui Song, Shouyan Zhang, and Hui Wang. 2022. "Hydrogenation of Carboxyl Nitrile Butadiene Rubber Latex Using a Ruthenium-Based Catalyst" Catalysts 12, no. 1: 97. https://doi.org/10.3390/catal12010097

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