Method for the distillative recovery of toluylenediamine
    10.
    发明授权
    Method for the distillative recovery of toluylenediamine 有权
    蒸馏回收甲苯二胺的方法

    公开(公告)号:US07342134B2

    公开(公告)日:2008-03-11

    申请号:US10585648

    申请日:2005-01-07

    IPC分类号: C07C209/00

    CPC分类号: C07C209/84 C07C211/50

    摘要: The invention relates to a process for distillatively preparing TDA from a reactant stream comprising TDA, high boilers and low boilers in a dividing wall column in which a dividing wall is disposed in the longitudinal direction of the column to form an upper combined column region (2), a lower combined column region (3), a feed section (4) having a rectifying section (5) and stripping section (6), and also a withdrawal section (7) having a rectifying section (9) and stripping section (8), which comprises the following steps: a. feeding the reactant stream (13) into the feed section (4) of the dividing wall column (1); b. drawing off a low boiler fraction via the top of the column (11); c. drawing off TDA via a side draw (14) in the withdrawal section (7) of the dividing wall column (1); d. drawing off a low boiler fraction via the bottom of the column (12).

    摘要翻译: 本发明涉及从分隔壁塔中的TDA,高锅炉和低锅炉的反应物流中蒸馏制备TDA的方法,其中分隔壁沿塔的长度方向设置以形成上部组合塔区域(2 ),下组合柱区域(3),具有精馏段(5)和汽提区段(6)的进料段(4),以及具有整流段(9)和汽提段 8),其中包括以下步骤:a。 将反应物流(13)进料到分隔壁塔(1)的进料段(4)中; b。 通过塔(11)的顶部排出低沸点馏分; C。 通过分隔壁塔(1)的抽出部分(7)中的侧拉(14)抽出TDA; d。 通过柱(12)的底部排出低沸点馏分。