Method for Isolating Methyl Glycine Nitrile-N,N-Diacetonitriles from an Aqueous Crude Mixture
    2.
    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)。

    Method for isolating methyl glycine nitrile-N,N-diacetonitriles from an aqueous crude mixture
    3.
    发明授权
    Method for isolating methyl glycine nitrile-N,N-diacetonitriles from an aqueous crude mixture 有权
    从粗水混合物中分离甲基甘氨酸腈-N,N-二乙腈的方法

    公开(公告)号:US07754911B2

    公开(公告)日:2010-07-13

    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)。

    METHOD FOR ISOLATING METHYLGLYCINENITRILE-N,N-DIACETONITRILE
    4.
    发明申请
    METHOD FOR ISOLATING METHYLGLYCINENITRILE-N,N-DIACETONITRILE 审中-公开
    用于分离甲基丝氨酸N,N-二乙基纤维素的方法

    公开(公告)号:US20120184769A1

    公开(公告)日:2012-07-19

    申请号:US13498825

    申请日:2010-09-29

    IPC分类号: C07C253/34

    CPC分类号: C07C253/34 C07C255/25

    摘要: A method for isolating methylglycinenitrile-N,N-diacetonitrile (MGDN) from an aqueous mixture comprising MGDN is provided The method comprises cooling the aqueous mixture in one or more steps In one of these steps the mixture is cooled at a cooling rate of at least 20 K/h from a temperature above the solidification point of MGDN to a temperature below the solidification point of MGDN The method is implemented continuously

    摘要翻译: 提供了从包含MGDN的含水混合物中分离甲基亚氨基腈-N,N-二乙腈(MGDN)的方法。该方法包括在一个或多个步骤中冷却含水混合物。在这些步骤之一中,将混合物以至少的冷却速率 从MGDN的凝固点以上的温度20K / h到低于MGDN凝固点的温度。该方法连续实施