Method of dehydrogenating hydrocarbons using a calcium nickel phosphate catalyst

Claim 1

IN THE DEHYDROGENATION OF A MONOOLEFIN HAVING AT LEAST FOUR CARBON ATOMS IN THE UNSATURATED CARBON CHAIN USING A CATALYST, THE ACTIVE INGREDIENT OF WHICH IS CALCIUM NICKEL PHOSPHATE AND COMPRISING THE CONTINUOUSLY ALTERNATING OPERATIONS OF EFFECTING DEHYDROGENATION OF SAID MONOOLEFIN AND REGENERATION OF THE CATALYST AT A PROCESS MIXED FEED TEMPERATURE OF 950-1350*F., THE IMPROVEMENT WHICH COMPRISES EFFECTING SUCH REACTION AT GRADUALLY INCREASING PROCESS MIXED FEED TEMPERATURES, DETERMINING $F, CONTINUING THE REACTION UNTIL A TEMPERATURE IS REACHED WHICH IS INDICATIVE OF THE STAGE IN THE REACTION WHERE $F WOULD TEND TO INCREASE FROM CYCLE TO CYCLE, AND CONTINUING SAID REACTION WITH A DECREASED DURATION OF THE PROCESS PERIOD WHILE MAINTAINING THE TEMPERATURE OF THE ENTERING REACTANTS SUBSTANTIALLY CONSTANT WITHIN A TEMPERATURE RANGE OF A MAXIMUM OF 1350* F. AND A MINIMUM OF 950*F. WHEREBY TO MAINTAIN $F SUBSTANTIALLY CONSTANT FROM CYCLE TO CYCLE.