Selective Hydrogenation of Halonitroaromatic Compounds Catalyzed by Water-soluble Bimetallic Catalyst Containing Ruthenium and Platinum

Abstract

Abstract: Selective hydrogenation of halonitroaromatic compounds catalyzed by water-soluble bimetallic catalyst containing ruthenium and platinum in the aqueous/organic two-phase system was studied. It was found that the reaction rate increased obviously due to the addition of Pt and Pd. Ru/Pt-TPPTS bimetallic catalyst exhibits a strong synergic effect when the molar ratio of Ru to Pt is 1/1. Under the conditions of 70 ℃, p H₂=1.0 MPa, the conversion of p-Cl-C₆H₄NO₂ is 100% in the presence of Ru/Pt-TPPTS catalyst, which is higher than that of Ru-TPPTS or Pt-TPPTS, the selectivity of p-Cl-C₆H₄NH₂ is more than 99%. The catalyst also exhibits a high activity and selectivity for the hydrogenation of other haloaromatic nitro-compounds with different substituents and substituted positions. Meanwhile, the amount of dehalogenation product(aniline) is about 1%.

Key words: Water-soluble bimetallic catalyst, Catalytic hydrogenation, Halonitroaromatic compound, Bimetallic synergic effect

CLC Number:

O643

TrendMD:

ZHOU Ya-Fen, CHEN Jun-Ru, LI Rui-Xiang, ZHAO Song-Lin, LI Xian-Jun . Selective Hydrogenation of Halonitroaromatic Compounds Catalyzed by Water-soluble Bimetallic Catalyst Containing Ruthenium and Platinum[J]. Chem. J. Chinese Universities, 2004, 25(5): 884.

References

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