Production of isohexane and cyclohexane

Claim 1

IN A PROCESS FOR THE ISOMERIZATION OF HYDROCARBONS WHICH COMPRISES CONTACTING A HYDROCARBON FEED COMPRISING AN ISOMERIZABLE HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ISOMERIZABLE NORMAL PARRAFINS AND NAPHTHENES WITH AN ALUMINUM HALIDE-HYDROCARBON COMPLEX CATALYST PROMOTED BY HYDROGEN HALIDE, THEREBY ISOMERIZING SAID HYDROCARBON, AND REMOVING SAID CATALYST FROM ADMIXTURE WITH THE THUS TREATED HYDROCARBON PRODUCT, THE IMPROVEMENT WHICH COMPRISES PASSING THUS TREATED HYDROCARBON PRODUCT TO A GAS REMOVAL ZONE IN WHICH GASEOUS MATERIAL IS SEPARATED FROM THE LIQUID HYDROCARBON PRODUCT AND VENTED FROM THE SYSTEM, CONTACTING THE VENTED GASES WITH AN ABSORBENT OBTAINED AS HEREINAFTER DESCRIBED AND THUS EFFECTING THE ABSORPTION OF HYDROGEN HALIDE IN SAID VENT GAS BY SAID ABSORBENT, MIXING THE RESULTING ABSORBENT CONTAINING HYDROGEN HALIDE WITH SAID LIQUID HYDROCARBON PRODUCT, PASSING THE RESULTING MIXTURE TO A HYDROGEN HALIDE STRIPPING ZONE WHEREIN HYDROGEN HALIDE IS REMOVED FROM SAID HYDROCARBON PRODUCT BY STRIPPING, AND RETURNING PART OF THE THUS STRIPPED HYDROCARBON PRODUCT TO CONTACT WITH SAID VENTED GAS AS HEREINBEFORE DESCRIBED.