Cobalt catalysts
AssigneeBASF SE
InventorsBoris Breitscheidel, Peter Polanek, Guido Voit, Tom Witzel, Gerd Linden, Michael Hesse
Life of this patent
Estimating the term…
Abstract
Cobalt catalysts whose catalytically active composition comprises from 55 to 98% by weight of cobalt, from 0.2 to 15% by weight of phosphorus, from 0.2 to 15% by weight of manganese and from 0.05 to 5% by weight of alkali metal, calculated as oxide, are prepared by calcining the catalyst composition, reducing it at final temperatures of from 200.degree. to 400.degree. C. in a stream of hydrogen and subsequently surface-oxidizing it by treatment in a stream of air at final temperatures of from 20.degree. to 60.degree. C. and can be used in a process for hydrogenating organic nitriles and/or imines.
Claims9
In a cobalt catalyst having a catalytically active composition comprising from 55 to 98% by weight of cobalt, from 0.2 to 15% by weight of phosphorus, from 0.2 to 15% by weight of manganese and from 0.5 to 5% by weight of alkali metal, calculated as oxide, as obtained by calcination of a powdery mixture of the active components in the form of their salts at a temperature of from 500.degree. to 1000.degree. C. and subsequent reduction in a stream of hydrogen at temperatures of from room temperature up to a final temperature of from 200.degree. to 400.degree. C., the improvement which includes a final step of surface-oxidizing said reduced catalyst by treatment in a stream of air at an elevated temperature up to not more than 60.degree. C. and for a period of time sufficient to impart a catalyst life of more than 5000 hours as determined for a hydrogenation reaction carried out in a basic media.
Dependencies are inferred from the claim text.