The use of aminized and phosphorylated cotton fabrics as ion exchange materials in the preparation of oil seed proteins.

Protein from oil seed meal is usually prepared by dispersing the protein at a pH more basic than its isoelectric point, separating the undispersed material, and precipitating the protein by lowering the pH to about the isoelectric point. The increase in pH is ordinarily accomplished by addition of base to the meal suspension, while lowering of the pH is effected by addition of acid, frequently sulfurous acid, or by the “self-souring process” in which acid is produced by microorganisms. The work to be reported shows that the required shifts in pH may be accomplished by use of ion exchange materials and that ion exchange materials prepared from cotton fabric are particularly convenient for this purpose. Protein preparations made in this way are low in ash and phosphorus content because of removal of ions in the process.