Extracted flake products protein concentrates

Soybean concentrate production involves the removal of soluble carbohydrates, peptides, phytates, ash, and substances contributing undesirable flavors from defatted flakes after solvent extraction of the oil. Typical concentrate production processes include moist heat treatment to insolubilize proteins, followed by aqueous extraction of soluble constituents aqueous alcohol extraction and dilute aqueous acid extraction at pH 4.5. 

Sodium Bisulfite Replaces Sulfur Dioxide in Soy Processing Solae Company, dba DuPont Soy Polymers (formerly Protein Technologies International), in Louisville, KY, extracts protein from soybean flakes for use in products, such as soy flours, concentrates, and isolates. The facility formerly used anhydrous sulfur dioxide to bleach products, stabilize drying, and lower pH. To improve safety, Solae switched to sodium bisulfite, a less acutely hazardous chemical. The change improved the safety of more than 37,000 residents and others who work in Louisville. 

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