Abstract
A new homogeneous bimetallic catalyst, based on Rh-Ru compounds, for the hydrogenation of acrylonitrile-butadiene copolymer(NBR) has been prepared. This paper described a study of the catalyst preparation and its hydrogenation process of NBR. The hydrogenation catalytic activity and selectivity of this bimetallic catalyst system (BMSC)was compared to two catalysts, RhCl(PPh3)3 and RuCl2(PPh3)3. NBR and hydrogenated NBR(HNBR) have also been characterized by infrared spectrum. The results showed that this new bimetallic complex catalyst offers good catalyst activity and excellent selectivity in NBR hydrogenation process to produce a highly saturated (98%) HNBR without gel formation. In addition, properties of the vulcanized HNBR have high tensile strength, elongation, tear strength and low permanent set. Its hot air ageing performance and oil swell test indicate that this HNBR is as good as those of current commercial products. Moreover, this new bimetallic complex catalyst, in conjunction with metal recovery system developed in this laboratory offers potential economic advantage in industrial applications.
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