▎ 摘　　要

NOVELTY - Supported porous nano-platinum ruthenium alloy catalyst is used in the hydrogenation reaction of ortho, meta, and p-chloronitrobenzene to prepare ortho, meta, and p-chloroaniline, catalyst contains metal oxide or carbon material as a carrier, and a porous nano-platinum ruthenium alloy as an active component, morphology of the porous nano-platinum-ruthenium alloy is formed by interconnecting platinum-ruthenium alloy particles, in the porous nano platinum ruthenium alloy, ruthenium is enriched in the outer layer, loading amount of platinum is 0.1-25 wt.%, and the loading amount of ruthenium is 0.01-5 wt.%. USE - Supported porous nano-platinum ruthenium alloy catalyst used for hydrogenation reaction of ortho, meta, and p-chloronitrobenzene to prepare ortho, meta, and p-chloroaniline (Claimed). ADVANTAGE - Active component of the catalyst is a nano platinum-ruthenium alloy with a porous structure, and the structure provides more active sites, so that the catalyst has higher activity. In addition, the pore structure obviously promotes the desorption of the product and improve the selectivity of the product. Used noble metals are platinum and ruthenium, and the cost of the platinum is lower compared with other noble metals with higher hydrogenation activity. The adoption of ruthenium further reduce the cost of the catalyst on the premise of improving the selectivity of the catalyst. Due to the existence of the porous structure, the catalytic action of platinum and ruthenium is embodied, so that the prepared catalyst fully benefit from the synergistic effect of platinum and ruthenium, and excellent substrate conversion rate and target product selectivity is obtained. The catalyst has good effect on the reaction of catalyzing o- (m, p) chloronitrobenzene to prepare o- (m, p) chloroaniline by hydrogenation and the like with certain difficulty and application prospect. Convert the substrate with high selectivity and high activity under the conditions of not using a dechlorination inhibitor and using less catalyst. The obtained high activity and high selectivity is maintained under severe conditions.