Method of producing protein hydrolizate from potatoes and potato waste

Claim 1

A PROCESS FOR PRODUCING PROTEIN HYDROLIZATE FROM POTATOES AND POTATO WASTE WHICH COMPRISES FORMING A SLURRY OF THE POTATO MATERIAL IN WATER AND THEN SEPARATING SUSPENDED SOLID MATTER FROM THE LIQUID FRACTION, ADDING TO THE LIQUID FRACTION A PRECIPITATE SELECTED FROM THE GROUP CONSISTING OF THE ALKALINE EARTH METAL OXIDES AND HYDROXIDES TO PRECIPITATE SUGARS, SEPARATING THE RESULTANT PRECIPITATE FROM THE DESUGARED LIQUID FRACTION AND DIGESTING THE LATTER WITH A MINERAL ACID TO HYDROLYZE PROTEINS TO AMINO ACIDS, PASSING THE HYDROLYZED LIQUID FRACTION THROUGH AN ANION EXCHANGE RESIN TO REMOVE THE MINERAL ACID, THEREAFTER PASSING THE LIQUID FRACTION THROUGH A CATION EXCHANGE RESIN AND THEREIN EXCHANGING ALKALINE EARTH METAL CATIONS FOR SODIUM IONS AND FORMING SODIUM SALTS OF THE AMINO ACIDS, ABSORBING THE INORGANIC COMPOUNDS IN SAID CATION EXCHANGE RESIN WHILE WITHDRAWING THEREFROM A SOLUTION OF SAID AMINO ACID SALTS, AND CONCENTRATING THE WITHDRAWN SOLUTION TO A PRODUCT OF HIGH AMINO ACID SALT CONTENT.