Alkylation process

Claim 1

A PETROLEUM TREATING PROCESS WHICH COMPRISES SUBJECTING N-BUTANE TO ISOMERIZATION TO YIELD AN ISOMTE MIXTURE COMPRISING N-BUTANE AND ISOBUTANE, CONTACTING SAID ISOMATE MIXTURE WITH A SELECTIVE ADSORBENT WHICH SELECTIVELY ADSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS TO ADSORB N-BUTANE FROM SAID ISOMATE MIXTURE, PASSING THE REMAINING ISOBUTANE TO AN ALKYLATION REACTION ZONE INTO ADMIXTURE WITH AN OLEFINIC HYDROCARBON STREAM CONTAINING PROPYLENE AND N-BUTANE WHEREIN SAID PROPYLENE REACTS WITH SAID ISOBUTANE TO YIELD A CORRESPONDING ALKYLATE RECOVERING FROM THE ALKYLATION REACTION ZONE AN ALKYLATION REACTION EFFLUENT COMPRISING UNREACTED ISOBUTANE, NBUTANE AND SAID ALKYLATE,A RETURNING AT LEAST A PORTION OF SAID UNREACTED ISOBUTANE TO THE ARORESAID ALKYLATION REACTION ZONE, SEPARATING THE AFORESAID N-BUTANE FROM THE ALKYLATION REACTION EFFLUENT, EMPLOYING THE SEPARATED NBUTANE TO DESORB THE ADSORBED N-BUTANE FROM SAID ADSORBENT, PASSING THE RESULTING DESORPTION EFFLUENT COMPRISING ONLY N-BUTANE TO THE AFORESAID ISOMERIZATION REACTION AND RECOVERING SAID ALKYLATE AS PRODUCT FROM THE AFORESAID ALKYLATION REACTION EFFLUENT.