Process for preparing diaryl carbonates and polycarbonates
    85.
    发明授权
    Process for preparing diaryl carbonates and polycarbonates 有权
    制备碳酸二芳基酯和聚碳酸酯的方法

    公开(公告)号:US09150490B2

    公开(公告)日:2015-10-06

    申请号:US13074433

    申请日:2011-03-29

    摘要: The present invention relates to a process for the continuous preparation of diaryl carbonates from phosgene and at least one monohydroxy compound (monophenol) in the presence of catalysts, and also the use thereof for preparing polycarbonates. The hydrogen chloride formed in the reaction is converted by electrochemical oxidation into chlorine, with the chlorine being recirculated to the preparation of phosgene. In particular, the process comprises utilization of the hydrogen chloride formed for the process for preparing diphenyl carbonate (DPC process).

    摘要翻译: 本发明涉及在催化剂存在下从光气和至少一种单羟基化合物(单酚)连续制备碳酸二芳酯的方法,以及其用于制备聚碳酸酯的方法。 在反应中形成的氯化氢通过电化学氧化转化成氯,氯被再循环到光气的制备中。 特别地,该方法包括利用形成的用于制备碳酸二苯酯的方法中的氯化氢(DPC工艺)。

    PROCESS FOR CONTINUOUSLY PREPARING DIALKYL CARBONATE
    89.
    发明申请
    PROCESS FOR CONTINUOUSLY PREPARING DIALKYL CARBONATE 审中-公开
    连续制备碳酸氢钾的方法

    公开(公告)号:US20120130110A1

    公开(公告)日:2012-05-24

    申请号:US13280423

    申请日:2011-10-25

    IPC分类号: C07C68/08

    CPC分类号: C07C68/08 C07C69/96

    摘要: The present invention relates to a process comprising purifying dialkyl carbonates of the formula (II) in one or more columns in the presence of an alkylene oxide of the formula (V) and of an alkyl alcohol of the formula (IV) wherein R1 and R2 represent, independently of one another, linear or branched, substituted or unsubstituted C1-C6-alkyl, R3 and R4 represent, independently of one another, hydrogen, substituted or unsubstituted C1-C4-alkyl, substituted or unsubstituted C2-C4-alkenyl or substituted or unsubstituted C6-C12-aryl, and R5 represents a straight-chain or branched C1-C4-alkyl; and wherein the mean residence time of the dialkyl carbonate in the column(s) is from 0.3 h to 3 h.

    摘要翻译: 本发明涉及一种方法,其包括在式(V)的烯化氧和式(IV)的烷基醇存在下,在一个或多个塔中纯化式(II)的碳酸二烷基酯,其中R 1和R 2 彼此独立地表示直链或支链的取代或未取代的C 1 -C 6烷基,R 3和R 4彼此独立地表示氢,取代或未取代的C 1 -C 4 - 烷基,取代或未取代的C 2 -C 4 - 烯基或 取代或未取代的C 6 -C 12 - 芳基,R 5表示直链或支链C 1 -C 4烷基; 并且其中所述柱中碳酸二烷基酯的平均停留时间为0.3h至3h。