Process for controlled supply of steam to catalysts

Claim 1

IN A PROCESS OF OPERATING A CATALYTIC DEHYDROGENATION ZONE PERIODICALLY ON-STREAM FOR REACTION OF BUTENE VAPOR DILUTED BY STEAM THEN ON-STEAM FOR REGENERATION DURING THE CYCLE OF OPERATION, THE IMPROVEMENT WHICH COMPRISES DIVIDING A CONSTANT FLOW STREAM OF STEAM SUPERHEATED TO A TEMPERATURE IN THE RANGE OF 1200* TO 1600*F. INTO BRANCHED STREAMS, THROTTLING ONE OF SAID BRANCHED STREAMS OF SUPERHEATED STEAM THROUGH AN ADJUSTED VARIABLE ORIFICE AS IT IS PASSED TO THE ZONE CONTAINING CATALYST BED UNDERGOING REGENERATION, ADMIXING AIR WITH THE SUPREHEATED STEAM PASSED THROUGH THE CATALYST BED UNDERGOING REGENERATION, MAINTAINING PRESSURES IN THE RANGE OF 14 TO 6 P.S.I.G. IN GASES PASSING THROUGH THE CATALYST BED UNDERGOING REGENERATION, PURGING REGENERATION GAS FROM THE REGENERATED CATALYST BY A FLOW OF STEAM THERETHROUGH AT A PRESSURE OF 14 TO 6 P.S.I.G, THEN PUTTING THE PURGED REGENERATED CATALYST-CONTAINING ZONE ON-STEAM FOR REACTION BY ADMITTING THERETO A STREAM OF BUTENE VAPOR WITH AN INCREASED FLOW OF THE SUPERHEATED STEAM TO MAINTAIN IN SAID ZONE ON-STREAM FOR REACTION PRESSURES IN THE RANGE OF 14 TO 6 P.S.I.G., THEREBY ELIMINATING DEPRESSURING IN CHANGING FROM THE REGENERATION TO THE ON-STREAM FOR REACTION PARTS OF THE CYCLES.