Separation of aromatics from gasoline or kerosene fractions

Claim 1

A CYCLIC PROCESS FOR SEPARATING AROMATIC HYDROCARBON FROM A HYDROCARBON CHARGE BOILING IN THE RANGE OF GASOLINE AND KEROSENE AND COMPOSED OF NON-AROMATIC AND AROMATIC HYDROCARBONS WHICH COMPRISES INTRODUCING INTO A BED OF SILICA GEL DURING EACH CYCLE AN AMOUNT OF LIQUID CHARGE EQUIVALENT TO 50-85% OT "EQUILIBRIUM AMOUNT" TO SELECTIVELY ADSORB CHARGE AROMATIC, DISPLACING THE ABSORBED AROMATIC BY INTRODUCING INTO THE SILICA GEL DURING EACH CYCLE AN ESSENTIALLY AROMATIC HYDROCARBON LIQUID DESORBENT WHICH BOILS BELOW 500* F. AND OUTSIDE OF THE CHARGE BOILING RANGE IN AMOUNT OF 0.05-0.14 GAL./LB. OF SILICA GEL, SAID AMOUNT OF AROMATIC DESORBENT BEING SUFFICIENT TO CAUSE THE CHARGE HYDROCARBON CONTENT OF THE EFFLUENT STEAM FROM THE SILICA GEL DURING EACH CYCLE TO DECREASE BELOW 5% BY VOLUME, SEGREGATING THE EFFLUENT DURING EACH CYCLE INTO TWO PORTIONS ONE OF WHICH CONTAINS MOST OF THE SATURATE COMPONENTS OF THE CHARGE IN ADMIXTURE WITH DESORBENT AND THE OTHER OF WHICH CONTAINS MOST OF THE AROMATIC COMPONENTS OF THE CHARGE IN ADMIXTURE WITH DESORBENT AND IN AN AROMATIC PURITY OF AT LEAST 80* ON A DESORBENT-FREE BASIS, SEPARATELY DISTILLING EACH OF SAID PORTIONS TO RECOVER DESORBENT FROM THE CHARGE HYDROCARBONS, AND DIRECTLY RE-USING THE WET SILICA GEL FOR TREATMENT OF A FURTHER QUANTITY OF CHARGE IN THE NEXT CYCLE.