Patent ID: 11882850
Assignee: BURCON NUTRASCIENCE (MB) CORP.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B | IPC A  B

Claim 0:
1. A process of producing a soy protein product having a protein content selected from the group consisting of at least about 60 wt % and at least about 90 wt % (N×6.25) on a dry weight basis, which process comprises:
(a) extracting a soy protein source with water to cause solubilization of soy protein from the protein source and to form an aqueous soy protein solution,
(b) at least partially separating the aqueous soy protein solution from residual soy protein source,
(c) adjusting the pH of the aqueous soy protein solution to a pH of about 1.5 to about 3.6 to produce an acidified soy protein solution,
(d) separating the acid insoluble solid material from the acidified soy protein solution,
(e) concentrating the acidified soy protein solution by a selective membrane technique,
(f) diafiltering the concentrated acidified soy protein solution,
(g) adjusting the pH of the concentrated and diafiltered acidified soy protein solution to about 6.0 to about 8.0, and
(h) optionally drying the concentrated and diafiltered soy protein solution,, wherein the process does not comprise a direct addition and use of calcium salt or other salt in extraction of the protein from the protein source material or in any other step.