초록 ▼

A process for the preparation of a dispersed Group VIB metal sulfide hydrocarbon oil hydroprocessing catalyst comprising reacting aqueous ammonia and a Group VIB metal compound, such as molybdenum oxide or tungsten oxide, to form water soluble compounds such as aqueous ammonium molybdates or tungsta

A process for the preparation of a dispersed Group VIB metal sulfide hydrocarbon oil hydroprocessing catalyst comprising reacting aqueous ammonia and a Group VIB metal compound, such as molybdenum oxide or tungsten oxide, to form water soluble compounds such as aqueous ammonium molybdates or tungstates. The aqueous ammonium molybdates or tungstates are sulfided at a relatively low temperature with hydrogen sulfide without feed oil. The slurry stream is then passed through a separator and ammonia is flashed and separated from the system, leaving a separator residue slurry. The separator residue slurry is then mixed with feed oil, hydrogen and hydrogen sulfide and sulfided at a relatively high temperature to produce a dispersed molybdenum sulfide or tungsten sulfide catalyst of high hydroprocessing activity. The catalyst slurry and feed oil can then be passed to a hydroprocessing reactor.

대표청구항 ▼

A process comprising the preparation of a dispersed Group VIB metal sulfide hydrocarbon oil hydroprocessing catalyst comprising reacting ammonia and a Group VIB metal compound in water to form an aqueous ammonium Group VIB metal compounds, reacting said aqueous ammonium Group VIB metal compounds wit

A process comprising the preparation of a dispersed Group VIB metal sulfide hydrocarbon oil hydroprocessing catalyst comprising reacting ammonia and a Group VIB metal compound in water to form an aqueous ammonium Group VIB metal compounds, reacting said aqueous ammonium Group VIB metal compounds with hydrogen sulfide essentially in the absence of feed oil in a low temperature sulfiding step at a temperature in the range 70°to 350°F., continuing the reaction of aqueous ammonium Group VIB metal compound with hydrogen sulfide in an intermediate temperature sulfiding step at a temperature in the range 180°to 700°F. which is higher than the temperature in said low temperature sulfiding step and essentially without feed oil, withdrawing an aqueous effluent stream from said intermediate temperature sulfiding step, passing said effluent stream to a separator zone, removing ammonia from said aqueous effluent stream in said separator zone leaving a separator residue, passing said separator residue together with feed hydrocarbon oil and hydrogen sulfide to a high temperature sulfiding step at a temperature in the range 500°to 750°F. which is higher than the temperature in said intermediate temperature sulfiding step, the residence time in each of said sulfiding steps being at least 0.02 hours, and withdrawing from said high temperature sulfiding step an aqueous-oil slurry containing dispersed Group VIB metal sulfide slurry catalyst.