Process and catalyst for hydrogenation of kerosene to remove color and fluorescence

Claim 1

A PROCESS WITH COMPRISES CONTACTING A COLORUNSTABLE HYDROCARBON, TOGETHER WITH HYDROGEN, WITH A NITRIC-ACID-DIGESTED SULFIDED MOLYBDENUM-SILICIA-ALUMINA CATALYST AT TEMPERATURE AND PRESSURE CONDITIONS EFFECTIVE TO RENDER SAID HYDROCARBON COLOR-STABLE AND NONFLUORESCENT, SAID CATALYST HAVING BEEN MADE BY THE STEPS OF (1) DIGESTING A MIXTURE, COMPRISING FROM 2 TO 20 WEIGHT PERCENT MOLYBDENUM OXIDE, 0.1 TO 10 WEIGHT PERCENT SILICA, AND THE REMAINDER ALUMINA, WITH MIXTURE OF NITRIC ACID AND AMMONIUM NITRATE, AT A TEMPERATURE IN THE RANGE 100 TO 300* F. FOR A TIME IN THE RANGE 5 TO 60 HOURS, THE WEIGHT OF NITRIC ACID BEING CHEMICALLY EQUIVALENT TO FROM 0.5 TO 5 TIMES THE WEIGHT OF ALUMINA PRESENT, THE WEIGHT OF AMMONIUM NITRATE BEING FROM 0.1 TO 2 TIMES THE WEIGHT OF ALUMINA PRESENT, AND THE CONCENTRATION OF SAID NITRIC ACID BEING IN THE RANGE 40 TO 80 WEIGHT PER CENT; (2) EVAPORATING THE RESULTING MIXTURE TO DRYNESS; (3) HEATING THE RESIDUE TO DECOMPOSE NITRATES PRESENT; (4) FORMING THE RESIDUE INTO SUITABLE PARTICLES FOR CONTACTING; AND (5) CONTACTING SAID PARTICLES WITH HYDROGEN SULFIDE UNDER SUFFIDING CONDITIONS,.