608304 Disclosed is a process for the preparation of a soy protein solution, which includes: (a) extracting a soy protein source with an aqueous calcium salt solution to cause solubilization of soy protein from the soy protein source and to form an aqueous soy protein solution, (b) separating the aqueous soy protein solution from residual soy protein source, and either (c) within 20 minutes of step (b), (i) diluting the aqueous soy protein solution to a conductivity of less than 90 mS and (ii) adjusting the pH of the aqueous soy protein solution to a pH of 1.5 to 4.4 to produce an acidified soy protein solution having an absorbance of visible light at 600 nm (A600) of less than 0.055, or (d) within 40 minutes of step (b), (i) diluting the aqueous soy protein solution to a conductivity of less than 90 mS, (ii) adjusting the pH of the aqueous soy protein solution to a pH of 1.5 to 4.4 and (iii) heat treating the aqueous protein solution at a temperature of 70° to 160°C for 10 seconds to 60 minutes to produce an acidified soy protein solution having an absorbance of visible light at 600 nm (A600) of less than 0.055.
