Preparation of pulse protein products ("yp810")

A process of producing a pulse 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 comprises:

• (a) extracting a pulse protein source with water to cause solubilization of pulse protein from the protein source and to form an aqueous pulse protein solution,
• (b) at least partially separating the aqueous pulse protein solution from residual pulse protein source,
• (c) adjusting the pH of the aqueous pulse protein solution to a pH of about 1.5 to about 3.4 to produce an acidified pulse protein solution,
• (d) separating the acid insoluble solid material from the acidified pulse protein solution, and alternatively:
• (e) optionally concentrating the acidified pulse protein solution by a selective membrane technique,
• (f) optionally diafiltering the optionally concentrated pulse protein solution, and
• (g) optionally drying the optionally concentrated and optionally diafiltered pulse protein solution,
• or
• (h) concentrating and/or diafiltering the acidified pulse protein solution by a selective membrane technique to fractionate the protein component of the acidified pulse protein solution into a first retentate and a first permeate,
• (i) optionally drying the first retentate to provide a first pulse protein product,
• (j) concentrating and optionally diafiltering the first permeate to provide a second retentate and a second permeate, and
• (k) optionally drying the second retentate to provide a second pulse protein product.