Purification of polyol polyesters using a mixing vessel

Details Purification of polyol polyesters using a mixing vessel Purification of polyol polyesters using a mixing vessel

C - Chemistry, Metallurgy

07

H

C07H 13/06 (2006.01) A23D 9/007 (2006.01) A23D 9/013 (2006.01) A23L 1/308 (2006.01) C07H 15/04 (2006.01)

Patent

CA 2279286

Processes for treating a polyol fatty acid polyester comprise feeding an unrefined polyol fatty acid polyester containing impurities and soap, and a wash solution into a mixing vessel and dispersing the contents to form a mixture. The treated mixture is allowed to settle and separate into a first phase comprising treated polyol fatty acid polyester and a second phase comprising the wash solution, soap and impurities. A treated polyol fatty acid polyester is produced by the processes described herein. Impurities soluble in the wash solution, such as color bodies, and the like are among the impurities which can be removed by the processes of the present invention. Chelating agents can be included in the wash solution to aid in the removal of impurities such as trace metals.

Des procédés de traitement d'un polyester d'acide gras de polyol consistent à envoyer dans une cuve de mélange, d'une part un polyester d'acide gras de polyol non raffiné contenant des impuretés et du savon, et d'autre part une solution de lavage, puis à disperser le contenu de la cuve pour former un mélange. On laisse le mélange se déposer et se séparer en une première phase contenant le polyester d'acide gras de polyol traité et en une deuxième phase contenant la solution de lavage, le savon et les impuretés. Ces procédés permettant de produire un polyester d'acide gras de polyol traité. Les procédés de cette invention permettent également d'éliminer les impuretés telles que les impuretés solubles dans la solution de lavage comme les corps colorés et autres. Des agents de chélation peuvent être incorporés dans la solution de lavage pour faciliter l'élimination d'impuretés telles que des métaux à l'état de traces.

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