Fast filtering powder catalytic mixtures

摘要

The catalytic mixture resulting of a metal powder catalyst with a solid material (referred to here as a reaction-aid) that has good filtering properties, does not interfere with the reaction, does not interfere with recycling the catalyst back into the reaction, does not interfere with the refining and recovery of the metal from the catalyst after it is spent, and will not become separated from the catalyst during the preparation of this catalytic mixture, the chemical reaction or the separation of this catalytic mixture from the reaction medium, whereas the ratio of the reaction aid to the catalyst ranges from 0.05 to 20 on a weight basis. A preferred metal powder catalyst is acetylene black supported precious metal. Preferred reaction aids are sibunit powder or activated carbon. The catalytic mixture can be used for the catalytic transformation of compounds, such as the hydrogenation of olefins, or the hydrogenation of nitro compounds.

主权项

1. A catalytic mixture comprising:
a) a metal powder catalyst comprising metal crystals that have been fixed to a powder support by a fixing agent; and b) a reaction aid which aids in filtering but does not interfere with a reaction, which comprises particles with a particle size distribution, D50, of 5 μm-1000 μm and which is selected from the group consisting of a sibunit powder and an activated carbon; wherein the ratio of said reaction aid to said catalyst is 0.05-20 on a weight basis.