Apparatus for fractional distillation of multiple component mixtures

Claim 1

IN A DISTILLATION UNIT, A CASING, A SUPPLY CONDUIT COMMUNICATING INTERMEDIATELY THEREWITH FOR CONNECTION WITH A SOURCE OF FLUID UNDER PRESSURE, VAPOR AND LIQUID CONTACTING MEANS IN THE LOWER PART OF SAID CASING COMPRISING A LOWER EXHAUSTING SECTION AND AN UPPER RECTIFYING SECTION, LIQUID AND GAS DISCHARGE MEANS LEADING, RESPECTIVELY, FROM THE BOTTOM AND TOP OF SAID CASING, A LIQUID COLLECTING PLATE IN SAID CASING BELOW SAID INLET PIPE, VAPOR DUCTS PASSING THROUGH SAID PLATE AND LEADING PAST SAID INLET PIPE FOR CONDUCTING VAPORS FROM SAID VAPOR AND LIQUID CONTACTING MEANS INTO THE UPPER PORTION OF SAID CASING, MEANS FOR CONDUCTING REFLUX LIQUIDS CONDENSING IN SAID VAPOR DUCTS TO SAID VAPOR-LIQUID CONTACTING MEANS, EXPANSION MEANS IN SAID SUPPLY CONDUIT FOR CAUSING PRESSURE REDUCTION OF THE FLUID ISSUING INTO THE SAID CASING AND INITIAL EVAPORATION THEREFROM WITH RESULTING COOLING, THE SEPARATED, COOLED LIQUID FRACTION BEING RETAINED TEMPORARILY ABOVE SAID PLATE TO COOL SAID VAPOR DUCTS AND CONDENSE THE HIGHER BOILING FRACTIONS FROM THE VAPORS RISING FROM SAID VAPOR-LIQUID CONTACT MEANS, AND OVERFLOW MEANS FOR PASSING SAID COOLED LIQUID TO SAID VAPOR-LIQUID CONTACT MEANS BETWEEN SAID EXHAUST AND RECTIFYING SECTIONS AS FEED.