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US 11,375,736 B2Granted
Corn protein product having decreased free sulfite levels and method for manufacturing same
AssigneeCargill, Incorporated
InventorsMichael A. Porter, Hadi Nayef Yehia, Guo-Hua Zheng
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Abstract
Described herein is a corn protein product comprising greater than about 20% corn protein on a dry weight basis and a free sulfite concentration of less than 150 ppm on an as-is basis. Also disclosed herein is a method to obtain this corn protein product including the steps of providing a protein-rich stream derived from a wet corn milling operation, wherein the protein-rich stream comprises greater than 20% corn protein on a dry weight basis, and treating the protein-rich stream with an oxidant, preferably hydrogen peroxide.
Claims12
A method of treating a corn protein-rich stream, comprising:
- providing a protein-rich stream derived from a wet corn milling operation, wherein the protein-rich stream comprises not less than 80% corn protein on a dry weight basis and comprises sulfite in a range of about 300 ppm to 5000 ppm on an as-is weight basis;
- forming a wet cake by filtration of the protein-rich stream to provide a) a water-washed cake and b) a first filtrate;
- subsequently spraying the water-washed cake with a hydrogen peroxide solution while maintaining filtration vacuum to provide a) a hydrogen peroxide treated cake and b) a second filtrate;
- and
- harvesting the hydrogen peroxide treated cake to obtain a corn protein product having a free sulfite concentration of less than 150 ppm on an as-is basis.
2 more elements
Dependencies are inferred from the claim text.