Methods and apparatus for recovering zein from corn
First Claim
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1. A method of recovering zein protein from flaked corn comprising the steps of:
- (a) extracting flaked corn with a 60-80% aqueous ethanol solution by weight ethanol to separate zein protein from other solid components;
(b) removing solid components to yield a crude zein-containing alcoholic dispersion;
(c) contacting the crude zein dispersion with activated carbon for a time and under conditions effective to adsorb at least one of starch, color, oil and fatty acid;
(d) removing the activated carbon from the crude zein dispersion along with adsorbed impurities to yield a purified zein dispersion; and
(e) recovering the zein protein from the purified zein dispersion.
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Abstract
Methods and apparatus for recovering zein from substrates are disclosed. The method includes extracting a zein-containing substrate such as whole corn with ethanol to yield a crude zein alcoholic dispersion and treating this dispersion with an adsorbent to remove at least one of starch, color or oil to yield a purified zein which is subsequently recovered or used in industrial applications. A preferred adsorbent is activated charcoal.
43 Citations
2 Claims
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1. A method of recovering zein protein from flaked corn comprising the steps of:
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(a) extracting flaked corn with a 60-80% aqueous ethanol solution by weight ethanol to separate zein protein from other solid components;
(b) removing solid components to yield a crude zein-containing alcoholic dispersion;
(c) contacting the crude zein dispersion with activated carbon for a time and under conditions effective to adsorb at least one of starch, color, oil and fatty acid;
(d) removing the activated carbon from the crude zein dispersion along with adsorbed impurities to yield a purified zein dispersion; and
(e) recovering the zein protein from the purified zein dispersion.
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2. A method of recovering zein protein from flaked corn comprising the steps of:
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(a) extracting flaked corn with ethanol to separate zein protein from other solid components;
(b) removing solid components to yield a crude zein alcoholic dispersion;
(c) contacting the crude zein dispersion with activated carbon for a time and under conditions effective to adsorb at least one of starch, color, oil and fatty acid;
(d) removing the activated carbon along with adsorbed impurities to yield a purified zein dispersion; and
(e) spray drying the purified zein dispersion to yield the zein protein in dry form.
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Specification
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Current AssigneeLurgi PSI, Inc. (Air Liquide SA)
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Original AssigneeLurgi PSI, Inc. (Air Liquide SA)
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InventorsMcInnis, Jerel, Tang, Qingnong
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Primary Examiner(s)Low, Christopher S. F.
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Assistant Examiner(s)Lukton, David
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Application NumberUS09/469,032Time in Patent Office1,344 DaysField of Search530/373, 530/376, 530/422, 530/424, 530/427US Class Current530/373CPC Class CodesA23J 1/12 from cereals, wheat, bran, ...A23V 2002/00 Food compositions, function...A23V 2300/14 ExtractionY02P 20/582 Recycling of unreacted star...
