Thermally-inhibited pregelatinized non-granular starches and...

C - Chemistry – Metallurgy – 08 – B

Patent

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Details

C08B 30/14 (2006.01) A21D 6/00 (2006.01) A23L 1/0522 (2006.01) C08B 30/12 (2006.01)

Patent

CA 2221510

Thermally-inhibited, pregelatinized non-granular starches and flours are prepared by pregelatinizing the starch or flour and thermally inhibiting the starch or flour by dehydrating the starch or flour to anhydrous or substantially anhydrous and then heat treating the dehydrated starch. The pregelatinization may be carried out prior to or after the thermal inhibition using known methods which disrupt the granular structure such by drum-drying or jet-cooking and spray-drying. Preferably the starch or flour is adjusted to a pH above 7.0 prior to the thermal inhibition. The starch may be dehydrated by heating the starch in a suitable heating apparatus, by extracting the water from the starch using a solvent such as ethanol, or by freeze-drying the starch. Preferably the starch or flour is treated with a solvent to remove proteins and/or lipids and thus prevent off flavors.

L'invention porte sur des amidons et farines prégélatinés non granulaires, inhibés thermiquement, et préparés selon un procédé consistant à les prégélatiniser et à les inhiber thermiquement en les déshydratant pour les rendre anhydres ou sensiblement anhydres, puis à leur faire subir un traitement thermique. La prégélatinisation peut s'effectuer avant ou après l'inhibition thermique à l'aide de méthodes connues qui cassent la structure granulaire telles que le séchage au tambour, la cuisson par injection de vapeur ou le séchange par pulvérisation. Avant inhibition thermique, le pH des amidons et farines sera porté de préférence au-dessus de 7,0. La déshydratation peut se faire par chauffage dans un appareil adapté ou par extraction de l'eau à l'aide d'un solvant tel que l'éthanol, ou par lyophilisation. L'amidon ou la farine seront de préférence traités à l'aide d'un solvant pour en extraire les protéines et/ou les lipides et ainsi empêcher un goût désagréable.

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