Production of soluble protein solutions from pulses
AssigneeBurcon Nutrascience (MB) Corp.
InventorsKevin SEGALL, Martin Schweizer
Life of this patent
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Abstract
A pulse protein product, which may be an isolate, produces heat-stable solutions at low pH values and is useful for the fortification of acidic beverages such as soft drinks and sports drinks without precipitation of protein. The pulse protein product is obtained by extracting a pulse protein source material with an aqueous calcium salt solution to form an aqueous pulse protein solution, separating the aqueous pulse protein solution from residual pulse protein source, adjusting the pH of the aqueous pulse protein solution to a pH of about 1.5 to about 4.4 to produce an acidified pulse protein solution, which may be dried, following optional concentration and diafiltration, to provide the pulse protein product.
Claims59
A method of producing a pulse protein product having a protein content of at least about 60 wt % (N×6.25) on a dry weight basis, which comprises:
- (a) extracting a pulse protein source with an aqueous calcium salt solution 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) diluting the aqueous pulse protein solution to provide a diluted aqueous pulse protein solution,
- (d) adjusting the pH of the diluted aqueous pulse protein solution to a pH of about 1.5 to about 4.4 to produce an acidified aqueous pulse protein solution,
- (e) concentrating the acidified aqueous pulse protein solution formed in step (d) while maintaining the ionic strength substantially constant by a selective membrane technique to provide a concentrated pulse protein solution,
- (f) diafiltering the concentrated pulse protein solution to provide a concentrated and diafiltered pulse protein solution, and
- (g) drying the concentrated and diafiltered pulse protein solution, wherein said acidified pulse protein solution has a conductivity of less than about 95 mS.
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A pulse protein product having a protein content of at least about 60 wt % (N×6.25) d.b. which is water soluble and produces heat stable solutions at acid pH values of less than about 4.4.
Dependencies are inferred from the claim text.