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    • 95. 发明授权
    • Process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive useful products
    • 高沸点空气和/或温度敏感有用产品混合物的精馏方法
    • US08420838B2
    • 2013-04-16
    • US12911200
    • 2010-10-25
    • Juan HerguijuelaWerner PietzonkaAngela WildermannThomas Wolf
    • Juan HerguijuelaWerner PietzonkaAngela WildermannThomas Wolf
    • C07D311/00B01D3/14
    • B01D3/143B01D3/32B01D5/0063C07D311/72
    • According to the invention, a process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive substances which require a high separation efficiency is proposed, in particular a process for the working-up of a VE- or VEA-containing product stream. The process is characterized in particular in that, in a first purification stage, low-boiling products and unspecified isomers of the useful product are separated from the product stream virtually without loss of useful product and that, in a second purification stage, the useful product is removed in a stream having a purity of >97% by weight and a further stream having a purity of >92% by weight. A preferred embodiment of the process serves for working up VEA, in which the loss of useful product in the first purification stage is less than 5%, based on that amount of VEA in the feed which is added to the purification stage per unit time. Furthermore, the first purification stage may comprise a rectification column (1), from the top (1a) of which the low-boiling products and the unspecified isomers of VEA are taken off, a stream containing the useful product in purified form being taken off at the side (15) and/or at the bottom (1b) of the column (1).
    • 根据本发明,提出了需要高分离效率的高沸点空气和/或温度敏感物质的混合物的精馏方法,特别是用于处理VE-或VEA- 含有产品流。 该方法的特征在于,在第一纯化阶段中,将有用产物的低沸点产物和未指定的异构体与产物流分离,实际上不损失有用的产物,并且在第二纯化阶段中,有用的产物 在纯度> 97%重量的物流中除去,另一种纯度> 92%(重量)的物流。 该方法的优选实施方案用于处理VEA,其中基于每单位时间添加到纯化阶段的进料中的VEA量,第一纯化阶段中有用产物的损失小于5%。 此外,第一纯化阶段可以包括精馏塔(1),从其顶部(1a)排出低沸点产物和VEA的未指定的异构体,将含有纯化形式的有用产物的料流取出 在塔(1)的侧面(15)和/或底部(1b)处。