公开(公告)号：US5116518A

公开(公告)日：1992-05-26

申请号：US621644

申请日：1990-12-03

申请人： Wilfried Bachmann ,  Rolf Bader ,  Horst Buttner ,  Edgar Wetzel

发明人： Wilfried Bachmann ,  Rolf Bader ,  Horst Buttner ,  Edgar Wetzel

IPC分类号： C07C67/52 ,  C07C69/82

CPC分类号： C07C67/52

摘要： In the process for the purification of diemthyl terephthalate (DMT) by recrystallization from methanolic solution, the mother liquor containing the impurities, substantially the isomers DMI, DMO and aldehydes, is separated off and passed to a workup tank. The moist crystals are dried by melting with the evaporation of methanol. The mother liquor is then separated off by filtration, and the moist crystals obtained from the separation are washed before melting. The washing liquid is recycled together with a portion of the separated mother liquor into the recrystallization tank.

摘要翻译： 在通过从甲醇溶液中重结晶纯化对苯二甲酸二甲酯（DMT）的方法中，将含有杂质（基本上为异构体DMI，DMO和醛）的母液分离出并通入处理池。 潮湿的晶体通过用甲醇蒸发而熔化而干燥。 然后通过过滤分离母液，并将从分离得到的潮湿晶体在熔融之前洗涤。 洗涤液与一部分分离的母液一起再循环到再结晶槽中。

公开(公告)号：US5104052A

公开(公告)日：1992-04-14

申请号：US675698

申请日：1991-03-27

申请人： Edmund Wey ,  Johann Blask ,  Hermann Rutten ,  Horst Buttner ,  Manfred Anderheggen ,  Uwe Fabelji

发明人： Edmund Wey ,  Johann Blask ,  Hermann Rutten ,  Horst Buttner ,  Manfred Anderheggen ,  Uwe Fabelji

IPC分类号： B65H67/08

CPC分类号： B65H67/086 ,  B65H2701/31

摘要： A method and apparatus are provided for separating a yarn end of a yarn package from the outer layer of the yarn package and disposing the separated yarn end onto the yarn package in a preferred disposition. The apparatus includes a drive device for rotating a yarn package in an unwinding direction, an assembly for performing a yarn end drawing out operation during the unwinding rotation of the yarn package and a device for determining that a successful yarn end drawing out operation has been performed including an assembly for detecting that a yarn end of at least a predetermined length has been drawn out. The apparatus also includes an assembly for controlling the drive device to stop the unwinding rotation of the yarn package in response to the earlier of the lapse of a predetermined period of time and the receipt of a signal from the detecting device indicating that a successful yarn end drawing out operation has been performed. A designation device applies a designation to those yarn packages which do not have a yarn end which has been successfully drawn out, and a reading device and a yarn package transfer device operate together to transfer such unsuccessfully prepared yarn packages.

摘要翻译： 提供了一种方法和装置，用于将纱线卷装的纱线端部与纱线卷装的外层分离，并将分离的纱线端部以优选的布置布置在纱线卷装上。 该装置包括用于沿退绕方向旋转纱线卷装的驱动装置，用于在纱线卷装的退绕旋转期间进行纱线端拔出操作的组件以及用于确定已经执行成功的纱线抽出操作的装置 包括用于检测至少预定长度的纱线端头已被拉出的组件。 该装置还包括一个组件，用于控制驱动装置，以响应于早于预定时间段的过去而停止纱线卷装的退绕旋转，并且从检测装置接收到指示成功的纱线端部的信号 已执行拔出操作。 指定装置对没有成功拉出纱线端的那些纱线包装件进行指定，并且读取装置和纱线包装传送装置一起操作以传送这种未成功制备的纱线卷装。