Patent US3850990 (http://l2.espacenet.com/dips/viewer?PN=US3850990&CY=gb&LG=en&DB=EPD)
Group VIII metal catalyst that can be used include Fe, Co, Ni, Pt, Rh, Ru, Os, Ir and Pd (column 2 lines 45-46)Patent US3365498 (http://l2.espacenet.com/dips/viewer?PN=US3365498&CY=gb&LG=en&DB=EPD)
Pd, Pt, Ir, Rh, Ru, Os and Au (column 3 lines 49-50); co-oxidants may be Cu, Fe, Cr, Co, Ni, Mo, W and Pb.Patent US3080425 (http://l2.espacenet.com/dips/viewer?PN=US3080425&CY=gb&LG=en&DB=EPD)
various co-oxidantshttp://www.geocities.com/dritte123/Miscpat.html (http://www.geocities.com/dritte123/Miscpat.html)