PROCEDE DE PURIFICATION DE LA VANILLINE PAR EXTRACTION LIQUIDE-LIQUIDE
    1.
    发明公开
    PROCEDE DE PURIFICATION DE LA VANILLINE PAR EXTRACTION LIQUIDE-LIQUIDE 有权
    程序对香兰素清洗液 - 液萃取

    公开(公告)号:EP2791098A1

    公开(公告)日:2014-10-22

    申请号:EP12808776.4

    申请日:2012-12-13

    申请人: Rhodia Operations

    IPC分类号: C07C45/00 C07C47/565

    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.