Phase transfer catalyst for use in the synthesis of polyol...

Details Phase transfer catalyst for use in the synthesis of polyol... Phase transfer catalyst for use in the synthesis of polyol...

C - Chemistry, Metallurgy

07

H

C07H 13/06 (2006.01) C07C 67/03 (2006.01) C07C 67/62 (2006.01) C07C 69/33 (2006.01) C07C 69/58 (2006.01) C07C 69/587 (2006.01)

Patent

CA 2260775

A reaction mixture for manufacturing polyol fatty acid polyesters comprises a polyol, a fatty acid lower alkyl ester, a base initiator and a phase transfer catalyst. The phase transfer catalyst can be a quaternary ammonium compound, a crown ether, a polyethylene glycol, a polyethylene glycol ether, a polyethylene glycol ester or mixtures thereof. The process of making polyol fatty acid polyesters is carried out at low temperatures and essentially in the absence of a solvent or emulsifier. The polyol fatty acid polyester product stream produced by the foregoing process and reaction mixture has a lower concentration of reaction by-products such as di-fatty ketones and beta- ketoesters and of caramelized by-product which results from the breakdown of the polyol reactant.

Mélange réactionnel destiné à la production de polyesters polyol-acides gras, comprenant un polyol, un alkyl ester inférieur d'acide gras, un initiateur de base et un catalyseur de transfert de phase. Le catalyseur de transfert de phase peut être un composé d'ammonium quaternaire, un éther couronne, un polyéthylène glycol, un éther de polyéthylène glycol, un ester de polyéthylène glycol ou des mélanges de ces substances. Le procédé de fabrication des polyesters polyol-acides gras est réalisé à basses températures et pratiquement en l'absence de solvant ou d'émulsifiant. Le flux de polyester polyol-acides gras résultant du procédé en cours et du mélange de réaction présente une concentration plus faible en sous-produits de réaction tels que dicétones grasses et bêta-cétoesters et de sous-produits caramélisés résultants de la dégradation du réactif polyol.

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