C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 67/08 (2006.01) C07C 67/54 (2006.01) C07C 69/68 (2006.01)
Patent
CA 2508125
The invention relates to a continuous method of preparing ethyl lactate by means of lactic acid esterification using ethanol in the presence of a catalyst. The inventive method consists in continuously extracting a mixture comprising ethyl lactate, ethanol, water and different heavy products from an esterification reaction medium at partial lactic acid conversion rate and, subsequently, subjecting said mixture to a reduced-pressure flash separation, thereby producing an overhead stream containing a mixture of ethyl lactate, ethanol and water, the lower part of said mixture supplying a fractional distillation column.
L'invention concerne un procédé continu de préparation de lactate d'éthyle par estérification d'acide lactique au moyen de l'éthanol, en présence d'un catalyseur qui consiste à extraire en continu, du milieu réactionnel d'estérification à un taux de conversion partielle de l'acide lactique, un mélange comprenant du lactate d'éthyle, de l'éthanol, de l'eau et divers produits lourds puis à soumettre ce mélange à une séparation flash, sous pression réduite, de laquelle sort un flux de tête comprenant un mélange de lactate d'éthyle, d'éthanol et d'eau lequel mélange alimente, dans sa partie basse, une colonne de distillation fractionnée.
Burtin Elie
Teissier Remy
Tretjak Serge
Arkema
Robic
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