Patent ID: 7375055
Filing Date: 2008-05-20
Classification: B01J,C07C,C10G

Abstract:
1. A process for preparing a cobalt based catalyst precursor, which process includes in a first support impregnation/drying/calcination stage, impregnating a particulate porous catalyst support with a cobalt salt, partially drying the impregnated support, and calcining the partially dried impregnated support to obtain a calcined material having a starting cobalt oxide phase; partially reducing the calcined material at a temperature of from 100° C. to 300° C., so that the starting cobalt oxide phase is partially reduced to a cobalt oxide phase containing less oxygen than the starting cobalt oxide phase, thereby to obtain a partially reduced material; and in a second support impregnation/drying/calcination stage, impregnating the partially reduced material with a cobalt salt, partially drying the impregnated material, and calcining the partially dried impregnated material, to obtain the cobalt based catalyst precursor.