1. IN A CYCLIC ADSORPTION PROCES INVOLVING SUCCESSIVE CONTACT OF A CHARGE STOCK AND A DESORBENT WITH AN ADSORBENT, SAID CHARGE STOCK AND DESORBENT EACH BEING COMPOSED OF AROMATIC AND SATURATE HYDROCARBONS, AND EACH NORMALLY BOILING OUTSIDE THE RANGE OF THE OTHER, THE EFFLUENT FROM THE ADSORBENT BEING COLLECTED IN A PLURALITY OF PORTIONS WHICH ARE SUBJECTED TO FRACTIONAL DISTILLATION TO RECOVER THE SESORBENT AND AROMATIC AND SATURATE FRACTIONS OF THE CHARGE STOCK, AND WHEREIN THE CHARGE STOCK MAY OCCASSIONALY CONTAIN A SATURATE PORTION BOILING WITHIN THE BOILING RANGE OF THE DESORBENT, WHICH SATURATE FRACTION IS RECOVERED WITH THE DESORBENT IN THE FRACTIONAL DISTILLATION STEP WHEREBY TO LOWER THE PERCENTAGE OF AROMATICS IN THE DESORBENT AND THEREBY LOWER ITS EFFICIENCY, THE IMPROVEMENT WHICH CONSISTS IN INCREASING THE RATIO OF CHARGE STOCK TO DESORBENT WHICH HAS BECOME DILUTED WITH CHARGE SATURATES TO A VALUE SUCH THAT THE DESORBENT AROMATICS ARE SUBSTANTIALLY COMPLETELY DISPLACED FROM THE ADSORBENT BY THE CHARGE STOCK DURING EACH CYCLE OF OPERATION, COLLECTING A FIRST PORTION OF EFFLUENT FROM THE ADSORBENT COMPRISING CHARGE STOCK COMPONENTS AND DESORBENT SATURATES, COLLECTING A SECOND PORTION OF EFFLUENT FROM THE ADSORBENT COMPRISING CHARGE STOCK COMPONENTS AND DESORBENT SATURATES AND AROMATICS IN SUBSTANTIALLY THE SAME PROPORTION AS IN THE DESORBENT BEFORE DILUTION, SUBJECTING THE SECOND PORTION TO FRACTIONAL DISILLATION AND RECOVERING A RECONSTITUTED DESORBENT.