Method for processing protein from nonbinding oilseed by ultrafiltration and solubilization

There is provided a method of producing proteins from nonbinding oilseeds such as soybeans and peanuts by solubilization and ultrafiltration. A filterable protein feed is produced by extraction from a mixture of water and nonbinding oilseeds such as soybeans or peanuts. The feed is then passed over an ultrafiltration membrane system with a molecular weight cutoff of about 70,000 and preferably of 100,000 daltons or more. While the feed is being passed over the ultrafiltration membrane, the concentration or dilution of the protein feed is properly controlled in order to insure separation into the permeate of a substantial portion of that fraction of the constituents which produce color and flavor in the ultimate product.U