A process for the fractionation of liquid solutions of protein mixtures which includes the steps of subjecting such solutions to electrodialysis in the pH range 4.8 to 6, until desalting of the solution commences, said electrodialysis being conducted at temperatures below 15.degree.C; and continuing...http://www.google.com.au/patents/US3972791?utm_source=gb-gplus-sharePatent US3972791 - Fractionation of proteins by electrical means