Gorin

Claim 1

THE CONTINUOUS METHOD FOR THE SEPARATION OF HYDROCARBON MATERIALS HAVING A GREATER ABILITY TO FORM ADDUCTS WITH UREA FROM THE CHARGE MIXTURES CONTAINING THESE ADDUCT-FORMING COMPONENTS AND NON-ADDUCT-FORMING A COMPONENTS, WHICH COMPRISES CONTACTING SUCH A CHARGE MIXTURE WITH A SOLUTION OF UREA WHICH HAS A SPECIFIC GRAVITY DIFFERENT FROM BUT INTERMEDIATE BETWEEN THAT OF SAID CHARGE MIXTURE AND THAT OF SAID ADDUCTS, IN A SOLVENT WHICH IS CHEMICALLY INERT WITH RESPECT TO SAID CHARGE MIXTURE AND UREA, IS STABLE AT TEMPERATURES AT WHICH SAID ADDUCTS ARE NOT, IS NONMISCIBLE WITH SAID ADDUCTS ARE NOT, IS NONSOLVENT FOR SAID ADDUCTS UNDER THE CONDITIONS CONDUCIVE TO ADDUCT-FORMATION, TO FORM A THREEPHASE MIXTURE INCLUDING AN ADDUCT PHASE CONTAINING OCCLUDED NON-ADDUCT-FORMING COMPONENTS, AND OIL PHASE CONSISTING OF SAID CHARGE MIXTURE STRIPPED OF SUBSTANTIAL AMOUNTS OF SAID ADDUCT-FORMING COMPONENTS, AND A UREA SOLUTION PHASE; INTRODUCING SAID THREE-PHASE MIXTURE INTO A COLUMN OF ANOTHER SOLUTION OF UREA SIMILAR TO THAT DESCRIBED HEREINBEFORE, AT A POINT SUCH