Polyol polyester synthesis

C - Chemistry – Metallurgy – 07 – H

Patent

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Details

C07H 13/06 (2006.01) C07C 69/33 (2006.01) C07C 69/58 (2006.01) C07C 69/587 (2006.01)

Patent

CA 2263104

Polyol polyesters useful as nondigestible fat substitutes are prepared by improved heterogeneous interesterification processes between fatty acid esters of easily removable alcohol and polyol wherein the particle size of the polyol is reduced to less than 100 microns, and when the degree esterification of the polyol is between about 15 % and no more than 75 % substantially all of the unreacted polyol is removed. In the initial or early stages of the reaction, reaction conditions are adjusted to maintain a sufficient level of lower partial fatty acids to act as an emulsifier. The initial catalyst level is from about 0.001 to about 0.5 catalyst per mole of catalyst.

On élabore des polyesters de polyalcool utilisés comme substituts de matière grasse non digestible grâce à des procédés améliorés d'interestérification hétérogène entre des esters d'acide gras d'alcool et de polyalcool pouvant être facilement retirés, la dimension des particules du polyalcool étant réduite à moins de 100 microns et, pour un degré d'estérification du polyalcool compris entre 15 et 75 %, sans dépasser ce dernier chiffre, la quasi totalité du polyalcool n'ayant pas réagi étant retirée. Au début de la réaction ou dans les premiers moments de celle-ci, les conditions de réactions sont adaptées de façon à maintenir les acides gras partiels de faible poids moléculaire à une concentration suffisante pour les faire agir comme agent émulsifiant. La teneur initiale en catalyseur est comprise entre environ 0,001 et environ 0,5 par mole de catalyseur.

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