公开(公告)号：US20140200366A1

公开(公告)日：2014-07-17

申请号：US14119904

申请日：2012-06-01

申请人： Michael A. Curtis ,  Michael S. Decourcy ,  David A. Flosser ,  Melissa Harris ,  Jamie J. Juliette ,  Philippe P. Maillot

发明人： Michael A. Curtis ,  Michael S. Decourcy ,  David A. Flosser ,  Melissa Harris ,  Jamie J. Juliette ,  Philippe P. Maillot

IPC分类号： C07C51/44

CPC分类号： C07C51/44 ,  C07C67/54 ,  C07C67/60 ,  C07C69/54

摘要： The present invention provides a method for reducing accumulation of solid materials when manufacturing a (meth)acrylic acid ester having low biacetyl content (less than 2 ppm) by adding an aromatic diamine under conditions which provide sufficient residence time and thorough mixing to react up to 100% by weight of the biacetyl in the crude (meth)acrylic acid ester stream, prior to separation and purification. A feedback method is also provided for reducing solids accumulation in the separation and purification equipment of such processes by measuring the biacetyl content and adjusting the aromatic diamine addition rate so that excess aromatic diamine can be minimized. A third embodiment provides a method for reversing an accumulation of solid materials during such processes, while still producing a (meth)acrylic acid ester having low biacetyl content (less than 2 ppm), by reducing or ceasing the addition rate of aromatic diamine for a period of time.

摘要翻译： 本发明提供一种通过在提供足够的停留时间和充分混合以反应直至最终反应的条件下加入芳族二胺制造具有低二乙酰含量（小于2ppm）的（甲基）丙烯酸酯时减少固体物质累积的方法 100重量％的粗制（甲基）丙烯酸酯流中的二乙酰基，然后分离和纯化。 还提供了一种反馈方法，用于通过测量二乙酰基含量和调节芳族二胺添加速率来减少分离和净化设备中的固体积聚，使得过量芳族二胺可以最小化。 第三个实施方案提供了一种用于在这种方法中反转固体物质的积累的方法，同时通过降低或停止芳族二胺的加入速率来生产具有低双乙酰含量（小于2ppm）的（甲基）丙烯酸酯 一段的时间。