Process for the preparation of l-ascorbic acid

Details Process for the preparation of l-ascorbic acid Process for the preparation of l-ascorbic acid

C - Chemistry, Metallurgy

07

D

C07D 307/62 (2006.01)

Patent

CA 2362555

The invention relates to a method for producing L-ascorbic acid from 2-keto-L- gulonic acid or 2,3-4,6-diacetone-2-keto-L-gulonic acid. The reaction is carried out in the presence of water and hydrogen halide and the concentration of the hydrogen halide in water is greater than 37 wt. %.

L'invention concerne un procédé de préparation d'acide L-ascorbique à partir d'acide 2-céto-L-gulonique ou d'acide 2,3-4,6-diacétone-2-céto-L-gulonique, procédé selon lequel la réaction est effectuée en présence d'eau et d'halogénure d'hydrogène, et la concentration d'halogénure d'hydrogène dans l'eau est supérieure à 37 % en poids.

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