process of preparing a soluble soy protein product from soy protein micellar mass ('s200ca'), soy protein product and acidic solution

摘要

production of soluble soy protein products from soy protein micellar mass ("s200ca") a soy protein product having a protein content of at least 60 wt% (nx 6.25) db, preferably An isolate with a protein content of at least about 90 wt% (nx 6.25) db is formed from the precipitation supernatant of a soy protein micellar mass. a calcium salt or other divalent salt is added to the supernatant before concentration, after initial concentration or after final concentration to provide a conductivity of about 2 to about 30 ms. The precipitate is removed from the resulting solution and the pH of the clear soy protein solution is optionally adjusted to about 1.5 to about 4. The optionally clear adjusted pH solution is concentrated to a concentration of about 50 to about 400 gil and the concentrated protein solution is clear, optionally diafiltered before drying. The soy protein product is acid-soluble and produces transparent, heat stable solutions at low ph values and therefore can be used for protein fortification of soft drinks and sports drinks.