Adsorption process

Claim 1

AN IMPROVED MOVING BED PROCESS FOR SEPARATING STRAIGHT CHAIN HYDROCARBONS FROM THEIR MIXTURES WITH NONSTRAIGHT CHAIN HYDROCARBONS WHICH COMPRISES PASSING A MIXTURE COMPRISING NORMAL PARAFFINS TO AN ELONGATED ADSORPTION ZONE, PASSING A VERTICALLY MOVING BED OF ZEOLITIC MOLECULAR SIEVES TO AN UPPER PORTION OF SAID ZONE, WITHDRAWING FROM THE TOP OF SAID ZONE UNADSORBED NONSTRAIGHT-CHAIN COMPONENTS OF SAID MIXTURE, PASSING DOWNWARDLY THROUGH SAID ZONE A STREAM OF SAID SIEVES CONTAINING ADSORBED N-PARAFFINS, PASSING SAID STREAM OF SIEVES INTO A DESORPTION ZONE CONTAINING A HIGH BOILING AROMATICSCOMPRISING LIQUID HEATED TO A TEMPERATURE OF FROM ABOUT 200* TO 600*F., SAID AROMATICS-COMPRISING LIQUID BEING CHARACTERIZED BY NOT BEING ADSORBED BY SAID SIEVES, WITHDRAWING DESORBED N-PARAFFINS FROM A LOWER PORTION OF SAID FIRST NAMED ADSORPTION ZONE, WITHDRAWING FROM SAID DESORPTION ZONE A MIXTURE OF DESORBED SIEVES AND DESORBENT, PASSING, IN A THIRD ZONE, A MIXTURE OF DESORBED SIEVES AND DESORBENTS THROUGH AN UPFLOWING STREAM OF CONDENSED NON-STRAIGHT-CHAIN HYDROCARBONS WITHDRAWN FROM SAID ADSORPTION ZONE, REMOVING FROM SAID THIRD ZONE A FIRST STREAM COMPRISING SAID DESORBED SIEVES AND NON-STRAIGHT-CHAIN HYDROCARBONS AND PASSIING SAID FIRST STREAM TO AN UPPER PORTION OF SAID ADSORPTION ZONE, REMOVING FROM SAID THIRD ZONE A SECOND STREAM COMPRISING NON-STRAIGHT CHAIN HYDROCARBONS AND DISPLACED DESORBENT AND PASSING SAID SECOND STEAM TO A DISTILLATION ZONE, SEPARATING SAID NON-STRAIGHT CHAIN HYDROCARBONS FROM SAID DESORBENT, AND PASSING SAID DESORBENT TO SAID DESORPTION ZONE.