Patent ID: 8609177

Claim:
A process of preparing a canola protein product, which comprises: adding an initial quantity of a calcium salt, preferably calcium chloride, to supernatant from the precipitation of a canola protein micellar mass to provide conductivity of about 1 to about 3.5 and insufficient to cause precipitation of calcium phytate, adjusting the pH of the resulting solution to about 2.0 to about 4.0 to form an acidified solution, partially concentrating the acidified solution to a protein concentration of about 50 g/L or less, adding a further quantity of a calcium salt, preferably calcium chloride, to provide a conductivity of about 4 mS to about 30 mS and to cause a precipitate to form, removing the precipitate from the resulting solution to provide a clear pH-adjusted solution, concentrating the clear, pH-adjusted solution to a protein content of at least about 50 g/L to produce a clear concentrated canola protein solution, optionally diafiltering the clear canola protein solution, optionally effecting a colour removal step, and drying the concentrated protein solution to produce a dried canola protein product, wherein said concentration and/or optional diafiltration step are effected in such manner that the dried canola protein product contains about 60 to less than 90 wt % (N×6.25) protein on a dry weight basis.