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    Processes for preparing diaryl and/or alkylaryl carbonates from dialkyl carbonates
    6.
    发明授权
    Processes for preparing diaryl and/or alkylaryl carbonates from dialkyl carbonates 有权
    由碳酸二烷基酯制备二芳基和/或烷基芳基碳酸酯的方法

    公开(公告)号：US08039659B2

    公开(公告)日：2011-10-18

    申请号：US12210279

    申请日：2008-09-15

    申请人： Andre Düx ,  Pieter Ooms ,  Johann Rechner ,  Matthias Böhm ,  Kaspar Hallenberger ,  Georg Ronge ,  Johan Vanden Eynde

    发明人： Andre Düx ,  Pieter Ooms ,  Johann Rechner ,  Matthias Böhm ,  Kaspar Hallenberger ,  Georg Ronge ,  Johan Vanden Eynde

    IPC分类号： C07C69/96

    CPC分类号： C07C68/06 ,  C07C69/96

    摘要： Processes comprising: reacting a dialkyl carbonate and an aromatic hydroxy compound in the presence of a transesterification catalyst in a first reaction column, the first reaction column comprising a top section, a bottom section, a rectifying section in an upper portion of the column and a reaction zone below the rectifying section; feeding a bottom product from the first reaction column to a further reaction column; the bottom product comprising a diaryl carbonate, an alkylaryl carbonate, or both, and residual unreacted dialkyl carbonate and aromatic hydroxy compound; the further reaction column comprising a top section, a rectifying section in an upper portion of the column and a reaction zone below the rectifying section; and reacting the residual unreacted dialkyl carbonate and aromatic hydroxy compound in the further reaction column; feeding a process stream to a distillation column, the process stream comprising a mixture of unreacted dialkyl carbonate and one or more reaction-product alcohols drawn from the first reaction column, the further reaction column, or both, such that the unreacted dialkyl carbonate is separated from the one or more reaction-product alcohols; and recycling the separated, unreacted dialkyl carbonate to the first reaction column; wherein the further reaction column comprises one or more condensers, and heat of condensation from the one or more condensers is fed back into the process.

    摘要翻译： 方法包括：在第一反应塔中的酯交换催化剂存在下使碳酸二烷基酯和芳族羟基化合物反应，所述第一反应塔包括塔的上部的顶部，底部，精馏段和 整流段下方的反应区; 将底部产物从第一反应塔进料至另一反应塔; 底部产物包含碳酸二芳基酯，碳酸二烷基酯或二者，和残留的未反应的碳酸二烷基酯和芳族羟基化合物; 所述另外的反应塔包括顶部，所述塔的上部的精馏部和所述精馏部下方的反应区; 并使残留的未反应的碳酸二烷基碳酸酯和芳族羟基化合物在另外的反应塔中反应; 将工艺流输送到蒸馏塔，所述工艺流包含未反应的碳酸二烷基酯和从第一反应塔，进一步的反应塔或两者中抽出的一种或多种反应产物醇的混合物，使得未反应的碳酸二烷基酯被分离 由一种或多种反应产物醇; 并将分离的未反应的碳酸二烷基酯再循环到第一反应塔中; 其中所述另外的反应塔包括一个或多个冷凝器，并且将来自所述一个或多个冷凝器的冷凝热反馈到所述方法中。

    Processes for purifying diaryl carbonates
    9.
    发明授权
    Processes for purifying diaryl carbonates 有权
    净化碳酸二芳基酯的方法

    公开(公告)号：US08022240B2

    公开(公告)日：2011-09-20

    申请号：US12274776

    申请日：2008-11-20

    申请人： Pieter Ooms ,  Johann Rechner ,  Matthias Böhm ,  Andre Düx ,  Kaspar Hallenberger ,  Georg Ronge ,  Johan Vanden Eynde

    发明人： Pieter Ooms ,  Johann Rechner ,  Matthias Böhm ,  Andre Düx ,  Kaspar Hallenberger ,  Georg Ronge ,  Johan Vanden Eynde

    IPC分类号： C07C67/02

    CPC分类号： C07C68/08 ,  B01D3/14 ,  B01D3/141 ,  Y02P20/57 ,  C07C69/96

    摘要： Processes comprising: transesterifying a dialkyl carbonate and an aromatic hydroxyl compound in the presence of a transesterification catalyst to provide a diaryl carbonate product comprising the transesterification catalyst as an impurity; subjecting the diaryl carbonate product to distillation in a first distillation column having an upper part and a lower part, wherein the upper part comprises a rectifying section and the lower part comprises a stripping section; and withdrawing a first sidestream from the first distillation column, wherein the first sidestream comprises a purified diaryl carbonate.

    摘要翻译： 方法包括：在酯交换催化剂存在下酯交换碳酸二烷基酯和芳族羟基化合物，得到包含酯交换催化剂作为杂质的碳酸二芳酯产物; 在具有上部和下部的第一蒸馏塔中对碳酸二芳基酯进行蒸馏，其中上部包括精馏段，下部包含汽提段; 以及从所述第一蒸馏塔排出第一侧流，其中所述第一侧流包含纯化的碳酸二芳基酯。