Separation of fatty oil from solid bleaching agents

Claim 1

IN THE TREATMENT OF A FATTY MATERIAL OF THE CLASS OF FATTY ACIDS, FATTY WAXES, GLYCERIDES, FATTY OIL ESTERS AND FRACTIONS THEREOF WITH ADSORBENT EARTH IN SOLID PARTICLE FORM, THE USED EARTH AFTER SEPARATION FROM THE TREATED SUBSTANCE RETAINING FATTY MATERIAL ADHERING THERETO WHICH IS SUBSTANTIALLY COMPLETELY IMMISCIBLE WITH WATER AND WHICH IS OF LOWER SPECIFIC GRAVITY THAN WATER WHEN DISSOLVED IN A SUBSTANTIALLY WATER-IMMISCIBLE SOLVENT OF LOWER SPECIFIC GRAVITY THAN WATER, A CONTINUOUS METHOD OF RECOVERING SAID FATTY MATERIAL FROM THE USED EARTH WHICH COMPRISES FORMING A SLURRY OF USED EARTH AND ADHERING FATTY MATERIAL IN THE PRESENCE OF WATER, CONTINUOUSLY PASSING A STREAM OF RESULTING SLURRY TO THE INTERMEDIATE PORTION OF A SUBSTANTIALLY VERTICAL TREATING ZONE MAINTAINED UNDER PRESSURE SUFFICIENT TO MAINTAIN LIQUID PHASE CONDITIONS THEREIN WHEREIN AN INTERMEDIATE LAYER OF INTRODUCED SLURRY IS MAINTAINED BETWEEN A LOWER LAYER OF WATER AND AN UPPER LAYER OF FATTY MATERIAL DISPLACED FROM USED EARTH, HEATING SAID INTERMEDIATE LAYER BY DIRECT INJECTION OF STEAM THERETO TO ABOUT A TEMPERATURE OF 200 TO 210* F. SUCH THAT ADHERING FATTY MATERIAL SEPARATES FROM THE SOLID PARTICLES AND RISES UPWARDLY INTO SAID UPPER LAYER AND SOLID PARTICLES FROM WHICH FATTY MATERIAL HAS BEEN SEPARATED BECOME WETTED AND DESCEND INTO SAID LOWER LAYER, AND SEPARATELY AND CONTINUOUSLY REMOVING DISPLACED MATERIAL AND SOLID PARTICLES FROM SAID TRAVELING ZONE.