| 摘要 |
A method is described for purifying vanillin, and derivatives thereof, from a solution of vanillin or of a vanillin derivative in a solvent S1 containing impurities, comprising the following steps: a) a step of evaporating the solvent S1 in the presence of water so as to obtain an aqueous solution of vanillin or of a vanillin derivative; b) a step of liquid/liquid extraction by bringing the aqueous solution obtained at the end of step a) into contact with a solvent S2, at a pH of greater than 8 and less than 10, so as to obtain an organic phase and an aqueous phase containing vanillin or a vanillin derivative and residual solvent S2; c) a step of precipitating, at a pH between 4 and 7.5, the vanillin contained in the aqueous phase obtained at the end of step b), and d) a step of isolating the vanillin or a derivative thereof. |
