| 摘要 |
Self-promoted molybdenum and tungsten sulphide hydrotreating catalysts are prepared by heating one or more water soluble catalyst precursors in a non-oxidizing atmosphere in the presence of sulphur at a temperature of at least about 200 DEG C. The precursors will be one or more compounds of the formula (ML)(MoyW1-yO4) wherein M is one or more promoter metals selected from Mn, Fe, Co, Ni, Cu, Zn and mixtures thereof, wherein O </= y </= 1 and wherein L is a nitrogen containing, neutral multidentate, chelating ligand. Ina preferred embodiment the ligand L will comprise one or more chelating alkyl di or triamines and the non-oxidizing atmosphere will comprise H2S. |
