Method for Isolating Methyl Glycine Nitrile-N,N-Diacetonitriles from an Aqueous Crude Mixture
    4.
    发明申请
    Method for Isolating Methyl Glycine Nitrile-N,N-Diacetonitriles from an Aqueous Crude Mixture 有权
    从水性原料混合物中分离出甲基甘氨酸腈-N,N-二乙腈的方法

    公开(公告)号:US20080194858A1

    公开(公告)日:2008-08-14

    申请号:US11913726

    申请日:2006-05-03

    IPC分类号: C07C255/00

    摘要: The invention relates to a process for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous emulsion which comprises MGDN and has an MGDN content of 3-50% by weight in a crystallizer, comprising the steps: (a) the aqueous emulsion is, starting from a temperature above the solidification point, cooled to a temperature below the solidification point, the cooling rate averaged over time not exceeding 5 K/h, until substantially the entirety of the emulsified MGDN has solidified, (b) the resulting aqueous suspension is cooled further and/or concentrated, and the cooling rate may be greater than in step (a).

    摘要翻译: 本发明涉及一种从结晶器中含有MGDN并具有3-50重量%的MGDN含量的水性乳液分离出甲基亚氨基腈-N,N-二乙腈(MGDN)的方法,包括以下步骤:(a) 乳液从高于固化点的温度开始冷却到低于凝固点的温度,随着时间的推移平均冷却速度不超过5K / h,直到基本上全部乳化的MGDN已经固化,(b)所得到的 水性悬浮液进一步冷却和/或浓缩,并且冷却速率可以大于步骤(a)。