Recovery of glutamic compounds from glutamine contained in an impure solution thereof

Claim 1

THE METHOD OF DERIVING PYRROLIDONE COMPOUND FROM A SUGAR SOLUTION HAVING GLUTAMIC COMPOUND AND OTHER AMINO COMPOUNDS ALONG WITH INORGANIC CATIONS AND ANIONS NATURALLY OCCURRING THEREIN, WHICH COMPRISES PASSING THE SOLUTION THROUGH A BED OF ACID-REGENERATED CATION EXCHANGE MATERIAL TO THE EFFECT LOADING OF THE BED WITH A QUANTITY OF AMINO COMPOUNDS INCLUDING GLUTAMIC COMPOUND AS WELL AS WITH IMPURITY CATIONS, PASSING AN UNLOADING SOLUTION THROUGH THE BED TO PASS THEREFROM AMINO COMPOUND LIQUOR CONTAINING GLUTAMIC COMPOUND AND OTHER AMINO COMPOUNDS IN SOLUTION SUBSTANTIALLY FREE FROM SUGAR AS WELL AS FROM INTERFERING ANIONS, TREATING THE AMINO COMPOUND LIQUOR TO SELECTIVELY CONVERT GLUTAMIC COMPOUND THEREIN TO PYRROLIDONE COMPOUND WHEREBY THERE RESULTS A MIXED LIQUOR CONTAINING PYRROLIDONE COMPOUND ALONG WITH AMINO COMPOUNDS AND CONTAMINATING CATIONS, AND SEPARATING THE PYRROLIDONE COMPOUND FROM THE AMINO COMPOUNDS BY PASSING THE MIXED LIQUOR THROUGH THE BED OF IRON EXCHANGE MATERIAL WHICH IS OF THE KIND THAT IS DISCRIMINATIVE AS BETWEEN AN ANIONIC GROUP OF COMPOUNDS AND A CATIONIC GROUP OF COMPOUNDS AS REPRESENTED BY THE PYRROLIDONE COMPOUND AND THE AMINO COMPOUNDS RESPECTIVELY WHEREBY ONE OF SAID GROUPS IS ADSORBED BY SAID MATERIAL WHILE THE OTHER GROUP IS REJECTED AND PASSED IN THE EFFLUENT SOLUTION FROM THE BED.