초록 ▼

A novel precious metal doped porous metal catalyst is disclosed. The precious metal is present in from 0.01 to 1.5 weight percent and distributed throughout the particles of porous metal to provide a surface to bulk ratio distribution of not greater than 60. The present invention is further directed

A novel precious metal doped porous metal catalyst is disclosed. The precious metal is present in from 0.01 to 1.5 weight percent and distributed throughout the particles of porous metal to provide a surface to bulk ratio distribution of not greater than 60. The present invention is further directed to a process of forming said doped catalyst and to improved processes of catalytic hydrogenation of organic compounds.

대표청구항 ▼

1. A hydrogenation catalyst formed by contacting an aqueous alkaline slurry of porous particulate material comprising a base metal with an alkaline solution of an alkaline promoter precious metal salt represented by the formula AxMYy wherein A represents a cation or ligand selected from ammonia, amm

1. A hydrogenation catalyst formed by contacting an aqueous alkaline slurry of porous particulate material comprising a base metal with an alkaline solution of an alkaline promoter precious metal salt represented by the formula AxMYy wherein A represents a cation or ligand selected from ammonia, ammonium, alkali metal or mixtures thereof, M represents a precious transition metal atom selected from Pt, Pd, Re, Ru, Rh, Ir or Os or mixtures thereof, Y is an anion selected from halide, nitrate, hydroxide, carbonate, bicarbonate, sulfate, or a C1-C4 carboxylate, and x and y each independently represent an integer of from 1 to 6; causing said porous metal material and an effective amount of salt to remain in contact at a pH of from about 8 to 12 for a sufficient time to have from 0.01 to about 1.5 wt. percent, based on the catalyst, of said promoter precious metal M deposit on a portion of the surface of said porous metal material; and washing said treated porous metal material with an aqueous solution to lower the pH at least 0.25 unit below the contact pH or with at least 25 parts of solution per part of solid treated porous metal material or both.