Patent ID: 8409654

Claim:
A process of preparing a soy protein product having a protein content of at least about 60 wt % (N×6.25) dry weight, which comprises: extracting a soy protein source to solubilize soy protein in the source material and to form an aqueous soy protein solution having a pH of about 5 to about 7, concentrating the aqueous soy protein solution to a concentration of about 50 to about 400 g/L to form a concentrated soy protein solution, optionally diafiltering the concentrated soy protein solution to form a concentrated and diafiltered soy protein solution, diluting the concentrated soy protein solution into chilled water having a temperature of less than about 15° C. to cause the formation of soy protein micelles, permitting the soy protein micelles to coalesce into a soy protein micellar mass, separating the soy protein micellar mass from the supernatant, acidifying the separated soy protein micellar mass to a pH of about 2.0 to about 4.0, and drying the separated acidified soy protein micellar mass to provide a soy protein product of at least about 60 wt % (N×6.25) d.b.