A PROCESS FOR THE REGENERATION OF SULFUR DEACTIVATED CATALYSTS BY CONTACT, OR REACTION, OF THE SAID CATALYST WITH METHANE. A CATALYST, OR CATALYST COMPOSITE, WHICH HAS BEEN POISONED, AND THEREBY DEACTIVATED, BY CONTACT WITH SULFUR IN SUFFICIENT CONCENTRATION AND EXPOSED TO OXYGEN TO FORM THE SULFATE, CAN BE REGENERATED BY CONTACT WITH METHANE. SUCH CATALYST REGENERATION TECHNIQUE FINDS PARTICULAR UTILITY IN SEMIREGENERATIVE TYPE REFORMING PROCESSES. REFORMING CATALYSTS, PARTICULARLY CATALYST COMPOSITES WHICH CONTAIN ALUMINA, E.G. NOBLE METAL ON AN ALUMINA BASE SUCH AS PLATINUM-ON-ALUMINA, WHICH HAS BEEN DEACTIVATED BY SULFUR COMPOUNDS CAN BE REGENERATED BY CONTACT WITH METHANE AT TEMPERATURES RANGING GENERALLY FROM ABOUT 700*F. TO ABOUT 1050*F., AND AT PRESSURES RANGING FROM ABOUT 15 P.S.I. TO ABOUT 300 P.S.I.