Thermally-inhibited non-pregelatinized granular starches and flours and process for their preparation

US6231675A · kind A · utility

Assignee

• National Starch and Chemical Investment Holding Copporation · US

Inventors

• Chung-Wai Chiu · Westfield, US
• Eleanor Schiermeyer · Bound Brook, US
• David J. Thomas · Woodbury, US
• Manish B. Shah · Willingboro, US
• Douglas J. Hanchett · Bound Brook Junction, US
• Roger Jeffcoat · Bound Brook, US

Key dates

• Filing date: Jun 7, 1999
• Grant date: May 15, 2001
• Expiry date: Jun 7, 2019

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A23G2200/06
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

Thermally-inhibited starches and flours which are functionally equivalent to chemically-crosslinked starches are prepared by a process which comprises the steps of dehydrating a granular starch or flour to anhydrous or substantially anhydrous (<1% moisture) and heat treating the dehydrated starch or flour for a time and at a temperature sufficient to inhibit the starch, (e.g., 120-180.degree. C. for up to 20 hours). Preferably the pH of the starch is adjusted to neutral or greater (e.g., pH 8-9.5) prior to the dehydration. The dehydration may be a thermal dehydration carried out simultaneously with the heat treatment or a non-thermal dehydration carried out by extraction with a solvent (e.g., ethanol) or by freeze drying.