Preparation of wool grease unsaponifiable matter

Claim 1

IN A PROCESS OF OBTAINING A CONCENTRATE OF THE UNSAPONIFIABLE MATTER OF WOOL FAT, THE STEPS WHICH COMPRISE SAPONIFYING WOOL FAT WITH AN ALKALI METAL SAPONIFYING AGENT IN A MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND AQUEOUS SOLUTIONS OF A WATER SOLUBLE ALIPHATIC MONOHYDRIC ALCOHOL OF 1 TO 4 CARBON ATOMS, ADJUSTING ALCOHOL CONTENT TO PROVIDE A SOLUTION OF A MIXTURE OF ALKALI METAL SOAPS OF WOOL FAT ACIDS AND UNSAPONIFIABLE MATTER OF WOOL FAT IN WATER AND THE ALCOHOL WHEREIN THE UNSAPONIFIABLE MATTER IS PRESENT IN THE SOLUTION IN A CONCENTRATION OF 5 TO 30 PER CENT OF WATER-ALCOHOL-WOOL FAT MIXTURE, THE ALCOHOL CONSTITUTING 10 TO 40 PER CENT OF THE WATER-ALCOHOL MIXTURE, FLOWING THE SOLUTION IN A CONTINUOUS STREAM TO AN UPPER PORTION OF AN ELONGATED EXTRACTION ZONE AT A TEMPERATURE OF 120 TO 180* F., SIMULTANEOUSLY, CONTINUOUSLY FLOWING A STREAM OF NAPHTHA IN A PROPORTION OF 1 TO 20 VOLUME PER VOLUME OF SAID SOLUTION INTO A LOWER PORTION OF THE ZONE, CONTINUOUSLY DRAWING OFF AT THE TOP OF THE ZONE A NAPHTHA SOLUTION OF UNSAPONIFIABLE MATTER AND RECOVERING THE UNSAPONIFIABLE MATTER FROM THE SOLUTION.