Verfahren zur Herstellung von Ascorbinsäure
    9.
    发明授权
    Verfahren zur Herstellung von Ascorbinsäure 失效
    制备抗坏血酸的方法

    公开(公告)号:EP0086324B1

    公开(公告)日:1988-09-21

    申请号:EP83100116.9

    申请日:1983-01-08

    IPC分类号: C07D307/62

    CPC分类号: C07D307/62

    摘要: 1. A process for the manufacture of ascorbic acid by rearranging ketogulonic acid esters in an alkaline medium, characterized by reacting a ketogulonic acid ester of the general formula see diagramm : EP0086324,P10,F1 wherein R signifies C1-5 -alkyl, with an amine having 12 to 38 carbon atoms in a protic or aprotic-dipolar organic solvent and cleaving the resulting ascorbic acid amine salt of the general formula see diagramm : EP0086324,P10,F2 wherein X**(cation) represents the ammonium ion of the amine used, without neutralization and isolating the ascorbic acid as well as, if desired, the amine used, whereby the isolation of the former is effected by liquid-liquid extraction or by digestion in a non-polar organic solvent.

    摘要翻译: 1.通过在碱性介质中重新排列酮缩酚酸酯来制造抗坏血酸的方法,其特征在于使通式的酮缩酚酸酯参见图示:EP0086324,P10,F1,其中R表示C1-5 - 烷基, 在质子或非质子 - 偶极有机溶剂中具有12至38个碳原子的胺,并切割所得的通式的抗坏血酸胺盐,参见图示:EP0086324,P10,F2,其中X **(阳离子)表示胺的铵离子 使用,而不中和,并且如果需要,分离所用的胺,由此通过液 - 液萃取或通过在非极性有机溶剂中消化来进行前者的分离。