Polymerization of mono-and disaccharides using low levels of...

C - Chemistry – Metallurgy – 08 – B

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C08B 37/00 (2006.01) C08B 37/02 (2006.01)

Patent

CA 2284911

Various polysaccharides are prepared by reacting glucose or glucose-containing materials such as hydrolyzed starch with a polyol such as sorbitol in the presence of mineral acids such as phosphoric, hydrochloric and/or sulfuric acid. In one embodiment, polydextrose is prepared by reacting glucose or glucose-containing materials such as hydrolyzed starch with a polyol such as sorbitol in the presence of low levels, i.e., from about 0.001 % to about 0.09 %, more narrowly from about 0.01 % to about 0.06 %, phosphoric acid. In other embodiments, other mineral acids or mixtures thereof may be employed. In alternate embodiments, a combination of mineral and organic carboxylic acids such as citric acid are employed. Because of the low levels of catalyst used in certain preferred embodiments, minimal or no off-flavors and little color are formed during the course of the reaction.

L'invention concerne la préparation de plusieurs polysaccharides par mise en réaction de glucose ou de matières contenant du glucose telles que de l'amidon hydrolysé, avec un polyol tel que du sorbitol, en présence d'acides minéraux tels que l'acide phosphorique, hydrochlorique et/ou sulfurique. Dans un mode de réalisation, on prépare un polydextrose par mise en réaction de glucose ou de matières contenant du glucose telles que de l'amidon hydrolysé, avec un polyol tel que du sorbitol, en présence de faibles niveaux, c'est-à-dire, entre 0,001 et 0,09 % environ et plus précisément entre 0,01 et 0,06 %, d'acide phosphorique. Dans d'autres modes de réalisation, on peut utiliser d'autres acides minéraux ou des mélanges de ces acides. Dans d'autres modes de réalisation encore, on utilise une combinaison d'acides minéraux et organiques carboxyliques tels que de l'acide citrique. A cause des faibles niveaux de catalyseurs utilisés dans certains modes de réalisation préférés, peu ou pas de saveur anormale et peu de coloration sont produits pendant la réaction.

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