| abstract |
The invention discloses a supported catalyst for hydrogenation of aromatic nitro compounds and a preparation method thereof. The supported catalyst for hydrogenation of aromatic nitro compounds comprises a carrier and main active components, auxiliary active components and auxiliary components supported on the carrier. catalyst component, the mass percentage content of the main active component in the catalyst ≥ the mass percentage content of the auxiliary active component; the main active component includes Pd or Pt, and the auxiliary active component includes Au, Pt, Co, Pd, Ru or Ir, the auxiliary component includes one or both of Ce, Zn, Mo, Fe, V and Ag; when the main active component is Pd, the auxiliary active component is Au, Pt or Co, and when the main active component is In the case of Pt, the co-active component is Pd, Ru or Ir. The catalyst can ensure the hydrogenation reaction activity on the basis of effectively reducing the content of precious metals, and has good initial activity, target product selectivity and service life in the process of hydrogenating aromatic nitro compounds to produce aromatic amines. |