Patent ID: 7247331

Claim:
A process for isolating milk proteins from milk or whey comprising the following steps: a) the milk or the whey is sterilized and defatted; b) the milk fraction derived from step a) is passed over a cation-exchange resin conditioned in an elution column; c) the fraction retained on the resin is eluted with an aqueous salt solution; d) the eluate resulting from step c) is desalted and sterilized and wherein α) the cation-exchange resin is a resin grafted onto strong acid functional groups; β) during step b), the binding parameters have the following values: BV is between 50 and 400; SV is between 2 and 40 h −1 ; LV is greater than or equal to 1 m/h and less than or equal to 5 m/h. γ) during step c), the elution parameters have the following values: BV is between 1.5 and 7; LV is less than 1 m/h.