Patent ID: 7172989

Claim:
A catalyst comprising rhenium and platinum on activated carbon having from 0.0001 to 0.5 part by weight of rhenium (calculated as metal), from 0.0001 to 0.5 part by weight of platinum (calculated as metal) and, optionally, from 0 to 0.25 part by weight of at least one further metal selected from among Zn, Cu, Ag, Au, Ni, Fe, Ru, Mn, Cr, Mo, W and V (calculated as metal) on 1 part by weight of nonoxidatively pretreated activated carbon as support, wherein the activated carbon has been nonoxidatively pretreated with water vapor, non-oxidizing mineral acids or nonoxidizing organic acids or bases, and wherein the activated carbon has not been oxidatively pre-treated.