Recovery of isoflavones and removal of oligosaccharides from aqueous mixtures using zeolites

US7618671B2 · kind B2 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• David Richard Corbin · New Castle, US
• Vasantha Nagarajan · Wilmington, US
• Vidya Pai · Rockville, US
• Stuart Thomas · London, GB

Key dates

• Filing date: Nov 5, 2004
• Grant date: Nov 17, 2009
• Expiry date: Oct 29, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/27
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides a process using zeolites for recovering isoflavones and removing undesired oligosaccharides from aqueous mixtures, such as soy whey and other plant processing waste products. The aqueous mixture is treated with a large pore hydrophobic zeolite, such as zeolite Beta, to remove isoflavones, followed by treatment with an ultrastabilized, hydrophobic zeolite Y, such as CBV-901 or HiSiv™ 4000, to remove the undesired oligosaccharides raffinose and stachyose. The recovered isoflavones and digestible sugars, glucose, sucrose, and fructose, are useful in food products.