Preparation of Rapeseed Proteins by Extraction,Ultrafiltration and Diafiltration

From industrial Rapeseed mean (Brassica napus, Var. Sollux) different protein preparates are prepared by varying extractions (water extraction, extraction with 1% CuSO₄ solution, extraction with 5% sodium chloride solution) following ultrafiltration (UF), diafiltration (DF) and drying. The UF, UF/DF respectively is a comparatively simple process for concentration and purification of all solved proteins without losses (globulins and above all albumins). The UF/DF treatment of a 5% sodium chloride solution protein extract leads to a preparate containing more than 90% protein in which glucosinolates and splitting products and also phytate are not detectable.