Selective conversion of normal paraffins with a crystalline zeolite

Claim 1

AN IMPROVED PROCESS FOR DEWAXING WAX CONTAINING HYDROCARBON OILS WHICH COMPRISES CONTACTING SAID OIL IN VAPOR PHASE AT A TEMPERATURE OF ABOUT 800* TO 1000*F. WITH A CRYSTALLINE METALLIC ALUMLINO-SILICATE ZEOLITE HAVING A UNIFORM PORE OPENING OF ABOUT 5 ANGSTROMS IN A CONTACTING ZONE, CONVERTING SELECTIVELY N-PARAFFINS AND WAX CONSTITUTENTS INTO LOWER MOLECULAR WEIGHT OLEFINS AND FORMING LIGHT HYDROCARBON GASES IN SAID ZONE, WITHDRAWING THE CONTACTED AND CONVERTED VAPORS FROM SAID ZONE, CONDENSING THE HYDROCARBONS BOILING ABOVE 100*F. FROM SAID WITHDRAWN VAPOR STREAM, SEPARATING THE UNCONDENSED GASES, MAINTAINING SAID CONTACTING UNTIL THE RATE OF SAID LIGHT HYDROCARBON GAS FORMATION IS LESS THAN 50 CC. PER MINUTE, AND THEREAFTER REGENERATING SAID METALLIC ALUMINO-SILICATE ZEOLITE WITH AN OXYGEN CONTAINING GAS.