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    Process for preparing a bisphenol
    1.
    发明公开
    Process for preparing a bisphenol 失效
    韦尔法罕zur Herstellung eines双酚。

    公开(公告)号：EP0559372A1

    公开(公告)日：1993-09-08

    申请号：EP93301389.8

    申请日：1993-02-24

    申请人： THE DOW CHEMICAL COMPANY (a Delaware corporation)

    发明人： Patrascu, Emil ,  Tank, Dieter ,  Gressmann, Jochen ,  Frey, Johann-Wilhelm ,  Wallbaum, Ulrich

    IPC分类号： C07C37/20 ,  C07C37/82 ,  C07C39/16

    CPC分类号： C07C37/20 ,  C07C37/82 ,  Y02P20/52 ,  C07C39/16 ,  C07C39/04

    摘要： Bisphenols are prepared by

    a) reacting a phenolic compound with a carbonyl compound in a reaction mixture, containing the carbonyl compound, a stoichiometric excess of the phenolic compound and a catalyst, to produce a product mixture containing a bisphenol,
    b) separating bisphenol from the product mixture to leave a mother liquor and
    c) recycling at least a portion of the mother liquor to the reaction mixture.
    At least a portion of the phenolic compound is contacted with a strongly acidic cation exchange resin and a strongly basic anion exchange resin before the phenolic compound is used in the reaction step a) and/or at least a portion of the product mixture and/or at least a portion or the mother liquor is contacted with a strongly acidic cation exchange resin and a strongly basic anion exchange resin before mother liquor is recycled to the reaction mixture.

    摘要翻译： 双酚通过以下方法制备：a）在含有羰基化合物，化学计量过量的酚类化合物和催化剂的反应混合物中使酚类化合物与羰基化合物反应，制备含双酚的产物混合物，b）将双酚与 产品混合物以留下母液并且c）将至少一部分母液再循环到反应混合物中。 在酚类化合物在反应步骤a）和/或至少一部分产物混合物中使用之前，至少部分酚类化合物与强酸性阳离子交换树脂和强碱性阴离子交换树脂接触，和/或 在将母液再循环到反应混合物中之前，至少一部分或母液与强酸性阳离子交换树脂和强碱性阴离子交换树脂接触。