Menthyl lactate process

Details Menthyl lactate process Menthyl lactate process

C - Chemistry, Metallurgy

07

C

C07C 67/08 (2006.01) C07C 67/30 (2006.01) C07C 69/68 (2006.01)

Patent

CA 2624063

A simple, high-yield process for making menthyl lactate (ML) is disclosed. Menthol and lactic acid react to produce a mixture comprising menthyl lactate and one or more higher lactoyl esters of ML. Hydrolysis of the esterification mixture follows in the presence of aqueous base under conditions effective to convert the higher lactoyl esters to menthyl lactate. Coincidentally, the conditions minimize hydrolysis of menthyl lactate to menthol, thereby maximizing the overall yield of ML.

L'invention concerne un procédé simple et de rendement de production élevé pour fabriquer du lactate de menthyle (LM). On fait réagir du menthol et de l'acide lactique pour produire un mélange comprenant du lactate de menthyle et un ou plusieurs esters de lactoyle supérieurs de LM. On effectue à la suite de cela l'hydrolyse du mélange d'estérification en présence d'une base aqueuse dans des conditions efficaces pour convertir les esters de lactoyle supérieurs en lactate de menthyle. Simultanément, les conditions minimisent l'hydrolyse du lactate de menthyle en menthol, ce par quoi on maximise le rendement global de production du LM.

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