Azeotropic distillation of straight chain paraffins from mixtures with branched chain paraffins with perfluoro compounds

Claim 1

THE METHOD FOR SEPARATING NORMAL HEPTANE FROM ADMIXTURE WITH A CLOSE BOILING BRANCHED CHAIN PARAFFINIC HYDROCARBON COMPRISING SUBJECTING THE ADMIXTURE OF HYDROCARBONS TO DISTILLATION CONDITIONS IN THE PRESENCE OF A COMPLETELY FLUORINATED ORGANIC COMPOUND BOILING WITHIN 70* F. OF THE BOILING POINT OF N-HEPTANE AND SELECTED FROM THE GROUP OF COMPOUNDS CONSISTING OF PERFLUOROPARAFFINS, PERFLUORO-DI-ALKYLETHERS, PERFLUORO-TRIALKYL AMINES, PERFLUORO-CYCLOPARAFFINS AND PERFLUORO-ALKYL-CYCLOPARAFFINS, AS AN ENTRAINER, CONDENSING THE OVERHEAD VAPORS, SEPARATING THE CONDENSATE INTO A HYDROCARBON PHASE RICH IN NHEPTANE AND CONTAINING SOME OF SAID COMPLETELY FLUORINATED ORGANIC COMPOUND IN SOLUTION AND A COMPLETELY FLUORINATED ORGANIC COMPOUND PHASE CONTAINING SOME N-HEPTANE IN SOLUTION, RECYCLING THIS LATTER FLUORINATED ORGANIC COMPOUND PHASE CONTAINING SOME N-HEPTANE INTOTHE ORIGINAL DIS-