Production of dried, defatted enzymatic material

Claim 1

A PROCESS FOR SIMULTANEOUSLY DESICCATING AND DEFATTING ENZYMATIC SUBSTANCE DERIVED FROM RAW TISSUE AND CONTAINING MOISTURE AND FAT TO PRODUCE A DRIED, DEFATTED, SOLID SUBSTANCE, WHICH COMPRISES MIXING SAID SUBSTANCE WITH A WATER IMMISCIBLE FAT SOLVENT, SAID SOLVENT BEING CAPABLE OF FORMING AN AZEOTROPE WITH WATER BOILING AT A TEMPERATURE BELOW ABOUT 60*C., DISTILLING THE AZEOTROPE FROM THE SUSPENDED SUBSTANCE AT A TEMPERATURE BELOW ABOUT 60*C. AND BELOW WHICH ENZYMES ARE DESTROYED BY HEAT, TO REMOVE A MAJOR PART OF THE WATER CONTAINED THEREIN, MAINTAINING AT ALL TIMES SUFFICIENT LIQUID SOLVENT IN CONTACT WITH SAID SUBSTANCE TO DISSOLVE THE FAT CONTAINED THEREIN AND TO MAINTAIN THE SOLID PARTICLES IN SUSPENSION, THEN SEPARATING THE LIQUID SOLUTION OF FAT AND SOLVENT FROM THE DRIED SOLID THUS FORMED AND FINALLY EVAPORATING THE RESIDUAL SOLVENT FROM THE SOLID MATERIAL AT A TEMPERATURE BELOW ABOUT 70*C.