Fractionation of tall oil

Claim 1

A PROCESS OF OBTAINING THE UNSAPONIFIABLE MATTER OF TALL OIL IN CONCENTRATED FORM, WHICH PROCESS COMPRISES MAKING UP A SOLUTION OF THE TALL OIL SOAPS CONTAINING THE UNSAPONIFIABLE MATTER OF TALL OIL FROM THE MANUFACTURE OF PAPER PULP IN A CONCENTRATION OF ABOUT 5 TO 25 PER CENT IN ISOPROPYL ALCOHOL AND WATER WITH THE FINAL SOLUTION CONTAINING FROM 15 TO 50 PER CENT OF ISOPROPYL ALCOHOL AND THE REMAINDER WATER, AND EXTRACTING OUT THE UNSAPONIFIABLE MATTER IN SAID SOLUTION BY COUNTERCURRENTLY FLOWING THE SOLUTION IN CONTACT WITH NAPHTHA IN A RATIO OF 1 TO 20 PARTS BY VOLUME PER PART OF TALL OIL SOAP SOLUTION AT A TEMPERATURE OF 80 TO 130*F., BY CONTINUOUSLY INTRODUCING THE SOLUTION INTO AN UPPER PORTION OF AN EXTRACTION ZONE AND CONTINUOUSLY INTRODUCING NAPHTHA INTO A LOWER PORTION OF THE SAME ZONE, DRAWING OFF THE SOLUTION OF ISOPROPYL ALCOHOL AND WATER AT THE LOWER END OF THE ZONE AT A POINT BELOW THAT OF INTRODUCTION OF THE NAPHTHA AND DRAWING OFF THE SOLUTION OF UNSAPONIFIABLE MATTER IN NAPHTHA AT THE OTHER END OF THE SYSTEM AT A POINT ABOVE THAT OF INTRODUCTION OF THE SOLUTION AND EVAPORATING THE NAPHTHA FROM THE SOLUTION OF UNSAPONIFIABLE MATTER.