摘要:
Polyol polyesters useful as nondigestible fat substitutes are prepared by improved heterogeneous interesterification processes between fatty acid esters of easily removable alcohol and polyol characterized by having one or more improvements such as using low levels of soap emulsifying agent, catalyst, and/or excess fatty acid ester; reducing the size of the polyol by mechanical means; removing extraneous particulate material during the reaction; using low temperature and/or high pressure and compensating by increasing the mass transfer area; and/or using backmixing in the initial stage(s) and plug-flow conditions in the final stage(s).
摘要:
An improved, solvent-free, two-stage transesterification process for preparing, from a polyol and fatty acid esters of an easily removable alcohol highly esterified polyol fatty acid polyesters having reduced levels of difatty ketones and &bgr;-ketoesters is disclosed. These reduced levels of difatty ketones/&bgr;-ketoesters are achieved by controlling the level of generated alcohol in the liquid phase of the reaction mixture and heating the reaction mixture to certain temperatures during the second stage of this improved process. Other optional reaction conditions, such as keeping the molar ratio of fatty acid esters to polyol within a specified range and reducing the level of basic catalyst, can also be used during the second stage reaction to further reduce the level of difatty ketones and/or &bgr;-ketoesters.
摘要:
Disclosed is a process for manufacturing a linear glucamide surfactant comprising reacting an N-alkylglucamine, e.g., N-methylglucamine, a fatty ester, e.g., coconut oil in the presence of a phase transfer agent, generally a nonionic surfactant, preferably a preformed product of the process, the reaction preferably being conducted in the presence of an alkaline catalyst.