申请人:Oftring Alfred
公开号:US20110004016A1
公开(公告)日:2011-01-06
The present invention relates to a method for the production of aminodicarboxylic acid-N,N,diacetic acids of the general Formula I, wherein X independently of one another represents hydrogen or an alkali metal and n represents a number 1 or 2. Furthermore, the invention relates to aminodicarboxylic acid-N,N-diacetic acids of high purity. The inventive method comprises the following steps: A.) reacting an aminodicarboxylic acid of the general Formula II, wherein X and n have the aforementioned meanings, with 0.8 to 1.2 mole equivalents of formaldehyde and with 0.8 to 1.2 mole equivalents of hydrocyanic acid; b) reacting the reaction products of step a) with 0.8 to 1.2 mole equivalents of hydrocyanic acid and with 0.8 to 1.2 mole equivalents of formaldehyde; c) hydrolyzing in the reaction product obtained in step b).
本发明涉及一种生产一般式I的氨基二羧酸-N,N-二乙酸的方法,其中X分别表示氢或碱金属,n表示数字1或2。此外,本发明涉及高纯度的氨基二羧酸-N,N-二乙酸。该创新方法包括以下步骤:A.) 与0.8至1.2摩尔当量的甲醛和0.8至1.2摩尔当量的氰化氢反应一般式II的氨基二羧酸,其中X和n具有上述含义;b) 用0.8至1.2摩尔当量的氰化氢和0.8至1.2摩尔当量的甲醛反应步骤a)的反应产物;c) 在步骤b)中获得的反应产物中水解。