| abstract |
A catalyst for hydrogenation of carbon-carbon double bonds, nitro groups and aldehyde groups in aliphatic and aromatic compounds comprises a membrane made from an alloy consisting of 80 to 95% by mass of palladium and 5 to 20% by mass of ruthenium or rhodium and consists of a non-porous layer and a porous layer positioned on one or both sides of the non-porous layer, having a well developed porous surface without through pores. The catalyst can be prepared by a process comprising application of zinc onto one or both sides of the surface of a membrane made from the above mentioned alloy, the layer-thickness of zinc to the membrane being equal 1:10-100, keeping the membrane with zinc applied there onto at a temperature of 20 to 250%, followed by a chemical recovery of zinc from the membrane. |