Recovery and utilization of olefins from gases

Claim 1

THE PROCESS OF RECOVERING AND UTILIZING OLEFINS FROM MIXED PARAFFINIC AND OLEFINIC GASES OF WHICH THE OLEFIN CONTENT CONSISTS ESSENTIALLY OF ETHYLENE AND PROPYLENE THAT COMPRISES FLUIDIZING WITH SUCH MIXED PARAFFINIC AND OLEFINIC GASES A SOLID COMMINUTED CATALYST HAVING AN ACTIVE ACID SURFACE AND SELECTED FROM THE GROUP CONSISTING OF SOLID PHOSPHORIC ACID CATALYST AND SILICAALUMINA CRACKING CATALYST AT A TEMPERATURE SUFFICIENT TO EFFECT SELECTIVE SORPTION ON THE CATALYST OF ETHYLENE AND PROPYLENE AS ETHYL AND PROPYL ESTERS BUT BELOW A TEMPERATURE AT WHICH POLYMERIZATION OF SAID OLEFINS WOULD OCCUR, SEPARATING THE UNSORBED GASES FROM THE CATALYST CONTAINING THE SORBED OLEFIN ESTERS, FLUIDIZING THE LATTER CATALYST IN A STREAM OF BENZENE VAPORS AND SUBJECTING THE FLUIDIZED STREAM TO AN INCREASED TEMPERATURE SUFFICIENT TO EFFECT DECOMPOSITION OF THE SORBED PROPYL ESTERS AND ALKYLATION OF THE BENZENE WITH THE RESULTANT PROPYLENE BUT AT A TEMPERATURE SUFFICIENT TO EFFECT DECOMPOSITION OF THE ETHYL ESTERS, SEPARATING THE CATALYST CONTAINING THE ETHYL ESTERS AND SUBJECTING IT TO AN INCREASE TEMPERATURE TO EFFECT DECOMPOSITION OF THE ETHYL ESTERS AND RELEASE OF ETHYLENE.