Selective removal of oligosaccharides from aqueous mixtures using zeolites
AssigneeE. I. Du Pont de Nemours and Company
InventorsDavid Corbin, Vasantha Nagarajan, Vidya Pai, Stuart Thomas
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Abstract
The present invention relates to a process for selectively removing undesired oligosaccharides from aqueous mixtures such as plant processing waste products, including soy whey and other vegetable wheys, using an ultrastabilized large pore, hydrophobic zeolite Y. The resulting solution, which contains isoflavones and digestible sugars such as glucose, fructose and sucrose, can serve as the basis for a nutritious new product.
Claims14
A method for selectively removing the oligosaccharides raffinose and stachyose from an aqueous mixture comprising the steps of:
- (a) contacting the aqueous mixture with an ultrastabilized hydrophobic zeolite Y having a Si/Al ratio of about 10 to about 45;
- (b) separating the zeolite from the aqueous mixture;
- and
- (c) recovering the aqueous mixture.
A method of using an ultrastabilized hydrophobic zeolite Y having a Si/Al ratio of about 10 to about 45 for selectively removing the oligosaccharides raffinose and stachyose from an aqueous mixture comprising the steps of:
- (a) contacting the aqueous mixture with said ultrastabilized zeolite;
- (b) separating the zeolite from the aqueous mixture;
- and
- (c) recovering the aqueous mixture.
A vegetable whey comprising glucose in an amount of at least about 50 ppm, raffinose in an amount of no more than about 400 ppm, and stachyose in an amount of no more than about 500 ppm.
A vegetable whey comprising fructose in an amount of at least about 10 ppm, raffinose in an amount of no more than about 400 ppm, and stachyose in an amount of no more than about 500 ppm.
A vegetable whey comprising sucrose in an amount of at least about 500 ppm, raffinose in an amount of no more than about 400 ppm, and stachyose in an amount of no more than about 500 ppm.
Dependencies are inferred from the claim text.