Patent ID: 9456621
Filing Date: 2016-10-04
CPC Classification: A23J,A23V

Claim Text:
1. A method of producing a soy protein product, which comprises: (a) extracting a soy protein source with an aqueous calcium salt solution, particularly calcium chloride solution, to cause solubilization of soy protein from the protein source and to form an aqueous soy protein solution, (b) separating the aqueous soy protein solution from residual soy protein source, (c) optionally diluting the aqueous soy protein solution, (d) adjusting the pH of the aqueous soy protein solution to a pH of about 1.5 to about 4.4 to produce an acidified clear soy protein solution, (e) optionally heat treating the acidified solution to reduce the activity of anti-nutritional trypsin inhibitors and the microbial load, (f) concentrating the aqueous clear soy protein solution while maintaining the ionic strength substantially constant by using a selective membrane technique, (g) optionally diafiltering the concentrated soy protein solution, (h) optionally pasteurizing the concentrated soy protein solution to reduce the microbial load, (i) adjusting the pH of the concentrated, optionally diafiltered and optionally pasteurized aqueous soy protein solution to about pH 6 to precipitate soy protein therefrom, and drying the pH adjusted solution of step (i) including the precipitated soy protein or recovering and drying the precipitated soy protein or heat treating the pH-adjusted solution of step (i) including the precipitated soy protein and then drying the heat treated, pH-adjusted solution including the precipitated soy protein or heat treating the pH-adjusted solution of step (i) including the precipitated soy protein then recovering and drying the precipitated soy protein.