Thermally-inhibited granular starches and flours and process...

C - Chemistry – Metallurgy – 08 – B

Patent

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Details

C08B 30/12 (2006.01) A21D 6/00 (2006.01) A23L 1/00 (2006.01) A23L 1/0522 (2006.01) A23L 1/068 (2006.01) A23L 1/16 (2006.01) A23L 1/18 (2006.01) A23L 1/187 (2006.01) A23L 1/19 (2006.01) A23L 1/212 (2006.01) A23L 1/217 (2006.01)

Patent

CA 2221520

Thermally inhibited starches and flours are prepared by a process which comprises the steps of non-thermally dehydrating a granular starch or flour to anhydrous or substantially anhydrous and heat treating the dehydrated starch or flour for a time and at a temperature sufficient to inhibit the starch or fluor and provide textural and viscosity characteristics comparable to chemically cross-linked starches and flours. Preferably, prior to the dehydrating and heat treating steps, the granular starch or flour is adjusted from its natural pH to a pH of 7 or above, preferably about 8-9.5. Preferably protein and/or lipids are removed from the starch or fluor prior to or after the thermal inhibition. Non-thermal dehydration (e.g., ethanol extraction or freeze drying) as well as alcohol extraction improves the taste.

L'invention porte sur des amidons et farines inhibés thermiquement préparés selon un procédé consistant à déshydrater non thermiquement de l'amidon ou de la farine granulaires pour les rendre anhydres ou sensiblement anhydres puis à leur faire subir un traitement thermique pendant une durée et à une température suffisantes pour en produire l'inhibition et leur conférer des caractéristiques de texture et de viscosité comparables à celles des amidons et farines réticulés chimiquement. Avant déshydratation et traitement thermique, le pH des amidons et farines granulaires sera porté de préférence de sa valeur naturelle à une valeur de 7 ou plus, de préférence environ 8 à 9,5. De préférence, les protéines et/ou lipides des amidons et farines en seront extraits avant ou après l'inhibition thermique. La déshydratation non thermique (par exemple l'extraction à l'éthanol ou la lyophilisation) ainsi que l'extraction par des alcools améliorent le goût.

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