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US 6,602,985 B1Granted
Extraction of zein protein from gluten meal
AssigneeLurgi PSI, Inc.
InventorsJerel McInnis, Qingnong Tang
Life of this patent
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Abstract
Zein is recovered from gluten meal prepared by wet milling procedures by washing the gluten with clean water to remove water-soluble components; separating the water-soluble components and recovering the water-insoluble components; extracting the water insoluble components with hydrous ethanol solvent to extract zein; recovering the crude zein extract; treating the crude zein extract with an adsorbent that adsorbs at least one of color, odor, oil and fatty acid; and to yield a purified zein extract.
Claims3
A process for preparing spray-dried zein protein from corn gluten comprising:
- (a) washing corn gluten with water to remove water-soluble components and recover the water-insoluble components containing the zein;
- (b) extracting the water-insoluble components with 40-90% hydrous ethanol solvent to extract zein and form a crude zein liquid composition;
- (c) removing insoluble components from said crude zein liquid composition to form an intermediate zein-containing liquid composition;
- (d) treating the intermediate zein-containing liquid composition with activated carbon for a time and under conditions effective to adsorb at least one of color, odor, oil and fatty acid to form an activated carbon-treated, zein-containing liquid composition;
- (e) removing the activated carbon and any adsorbed impurities from the activated carbon-treated, zein-containing liquid composition to yield a purified zein extract;
- and
- (f) spray drying the purified zein extract to yield spray-dried zein protein.
4 more elements
Dependencies are inferred from the claim text.