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    Process for the manufacture of dichloropropanol
    4.
    发明授权
    Process for the manufacture of dichloropropanol 失效
    制备二氯丙醇的方法

    公开(公告)号：US08471074B2

    公开(公告)日：2013-06-25

    申请号：US12529778

    申请日：2008-03-13

    申请人： Philippe Krafft ,  Patrick Gilbeau ,  Dominique Balthasart ,  Maurizio Paganin

    发明人： Philippe Krafft ,  Patrick Gilbeau ,  Dominique Balthasart ,  Maurizio Paganin

    IPC分类号： C07C31/36

    CPC分类号： C07C29/62 ,  C07C29/82 ,  C07C29/86 ,  C07C31/36

    摘要： Process for manufacturing dichloropropanol according to which, a) in a liquid reaction medium containing water, which is in contact with a gaseous phase, glycerol is reacted with hydrogen chloride under a partial pressure of hydrogen chloride in the gaseous phase greater than 0.2 bar absolute, and b) at least part of the liquid reaction medium and optionally part of the gaseous phase from step a) is (are) subjected to at least one separation operation and, prior to said separation operation, the part of the liquid reaction medium and the part of the gaseous phase from step a) is (are) subjected to bi) at least one treatment for reducing the weight ratio between the hydrogen chloride and the water in the part of the liquid reaction medium so as to attain a ratio less than or equal to the weight ratio between the hydrogen chloride and the water in the binary azeotropic hydrogen chloride/water composition at total pressure of the separation operation, and/or bii) at least one treatment for reducing the weight ratio between the water and the dichloropropanol in the part of the liquid reaction medium so as to attain a ratio less than or equal to the weight ratio between the water and the dichloropropanol in the ternary water/dichloropropanol/hydrogen chloride azeotrope at total pressure of the separation operation.

    摘要翻译： 制备二氯丙醇的方法，其中a）在含有与气相接触的水的液体反应介质中，丙三醇在大于0.2巴绝对压力的气相中在氯化氢的分压下与氯化氢反应， 和b）至少部分液体反应介质和任选地来自步骤a）的气相的一部分进行至少一个分离操作，并且在所述分离操作之前，将部分液体反应介质和 来自步骤a）的气相的一部分被进行至少一种处理以减少液体反应介质的部分中的氯化氢和水之间的重量比，以获得小于或等于 等于在分离操作的总压力下的二元共沸氯化氢/水组合物中的氯化氢和水之间的重量比，和/或bii）至少一种处理 r减少液体反应介质部分的水和二氯丙醇之间的重量比，以获得小于或等于三元水/二氯丙醇/氯化氢共沸物中水和二氯丙醇之间的重量比的比例 分离操作的总压力。