Hydrogenation of acrylonitrile-butadiene rubber latex using in situ synthesized RhCl(PPh(3))(3) catalyst

Catalytic hydrogenation of acrylonitrile-butadiene rubber (NBR) latex was achieved by using in situ synthesized RhCl(PPh(3))(3) catalyst. Water-soluble rhodium salt (RhCl(3)) was used as the catalyst precursor which was reacted in situ with triphenylphosphine (PPh(3)) to form RhCl(PPh(3))(3). Compar...

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Bibliographic Details
Published in:Applied catalysis. A, General General, 2013-04, Vol.457, p.62-68
Main Authors: Liu, Yin, Wei, Zhenli, Pan, Qinmin, Rempel, Garry L
Format: Article
Language:English
Subjects:
Acrylonitrile butadiene resins
Catalysis
Catalysts
Ethyl alcohol
Hydrogenation
Latex
Rhodium
Rubber
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Summary:Catalytic hydrogenation of acrylonitrile-butadiene rubber (NBR) latex was achieved by using in situ synthesized RhCl(PPh(3))(3) catalyst. Water-soluble rhodium salt (RhCl(3)) was used as the catalyst precursor which was reacted in situ with triphenylphosphine (PPh(3)) to form RhCl(PPh(3))(3). Compared with using solid RhCl(PPh(3))(3), hydrogenation of NBR latex using the in situ RhCl(PPh(3))(3) showed a faster hydrogenation reaction. Based on the retention of catalyst in the polymer, it was revealed that the efficiency of in situ synthesis and the diffusion of the catalyst from the aqueous phase into the polymer particles were crucial in achieving the required high degree of hydrogenation. As a result, it was discovered that by introducing a small amount of alcohol (e.g. RhCl(3)=0.52 mmol/L, PPh(3)=18 mmoI/L, ethanol/total NBR latex =1/10 volume ratio) to the feed latex, the in situ synthesized catalyst could be used in the hydrogenation reaction very efficiently.
ISSN:0926-860X
DOI:10.1016/j.apcata.2013.02.015