Process for obtaining purified protein isolates

Details Process for obtaining purified protein isolates Process for obtaining purified protein isolates

A - Human Necessities

23

J

99/49

A23J 1/14 (2006.01)

Patent

CA 1076876

PROCESS FOR OBTAINING PURIFIED PROTEIN ISOLATES ABSTRACT OF THE DISCLOSURE The invention relates to the production of purified protein isolates. The process of the invention comprises : 1) making a suspension or a slurry of cake of a protein substance containing compounds having a mucilaginous consistency with a volume in 1. of 10 to 15 times and preferably 3 to 5 times, the weight in kg of press cake of a solution of one or more alka- line-earth metal comprising a magnesium salt and further contai- ning Na sulphite, and adding to the suspension or slurry thus ob- tained a concentrated solution of an alkali in anamount suffi- cient to permit solubilization of the proteins, 2) separating in a known manner the protein extract from the insoluble residue, 3) acidifying the resulting clarified protein extract with an acid solution to a pH of between 4.5 and 5.5 to precipi- tate the proteins, and 4) separating in a known manner from the mother-liquors the protein precipitate formed, the said protein precipitate being subsequently subjected to washing. The protein isolates so obtained are light coloured and have a nitrogen content of at least 16%. -1-

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