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1. WO2007044146 - MENTHYL LACTATE PROCESS

Publication Number WO/2007/044146
Publication Date 19.04.2007
International Application No. PCT/US2006/033514
International Filing Date 29.08.2006
IPC
C07C 67/08 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
08by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
C07C 67/30 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
30by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
C07C 69/68 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
69Esters of carboxylic acids; Esters of carbonic or haloformic acids
66Esters of carboxylic acids having esterified carboxyl groups bound to acyclic carbon atoms and having any of the groups OH, O-metal, -CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
67of saturated acids
675of saturated hydroxy-carboxylic acids
68Lactic acid esters
CPC
C07C 67/08
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
08by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
C07C 67/30
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
30by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
Applicants
  • MILLENNIUM SPECIALTY CHEMICALS, INC. [US]/[US]
Inventors
  • ERMAN, Mark, B.
  • SNOW, Joe, W.
Agents
  • SCHUCHARDT, Jonathan, L.
Priority Data
11/249,24313.10.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MENTHYL LACTATE PROCESS
(FR) PROCÉDÉ DE PRODUCTION DE LACTATE DE MENTHYLE
Abstract
(EN)
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.
(FR)
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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