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21. 发明授权

US4567297A Preparation of aqueous N-methylol amide solutions 失效
标题翻译： N-羟甲基酰胺水溶液的制备
公开(公告)号：US4567297A
公开(公告)日：1986-01-28
申请号：US659711
申请日：1984-10-11
申请人： Peter Ball , Klaus Marquardt , Manfred Selig , Gunther Staudinger
发明人： Peter Ball , Klaus Marquardt , Manfred Selig , Gunther Staudinger
IPC分类号： C07C231/00 , C07C233/09 , C07C233/16 , C07C102/00
CPC分类号： C07C233/09 , C07C231/00 , C07C233/16
摘要： A process for the preparation of aqueous solutions of N-methylol-acrylamide and/or N-methylol-methacrylamide comprising forming a homogeneous mixture of aqueous solution of formaldehyde and aqueous solution of acrylamide and/or methacrylamide and passing the homogeneous mixture through an ion-exchange resin bed based on a styrene-divinylbenzene polymer with tertiary amino groups at an elevated temperature so that the reaction is at least 80% theoretically completed when the mixture issues from the bed, characterized in that the ion exchanger is initially in the form of its free base, the initial temperature and velocity of the homogeneous mixture being adjusted to maintain the bed temperature between 35.degree. and 60.degree. C. and continuing the passage of the homogeneous mixture through the exchanger bed until the bed temperature drops and/or the pH of the exiting solution is below 8.
摘要翻译：制备N-羟甲基 - 丙烯酰胺和/或N-羟甲基 - 甲基丙烯酰胺的水溶液的方法，包括形成甲醛水溶液和丙烯酰胺和/或甲基丙烯酰胺的水溶液的均匀混合物，并使均匀混合物通过离子交换树脂，基于具有叔氨基的苯乙烯 - 二乙烯基苯聚合物的交换树脂床在升高的温度下使得当所述混合物从所述床发出时，所述反应在理论上达到至少80％，其特征在于，所述离子交换剂最初为其游离碱，均匀混合物的初始温度和速度被调节以保持床温度在35℃和60℃之间，并且使均匀混合物继续通过交换器床直到床温度下降和/或pH 现有的解决方案低于8。

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