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    • 9. 发明公开
    • VERFAHREN ZUR GEWINNUNG VON N-PHOSPHONOMETHYLGLYCIN
    • VERFAHREN ZUR GEWINNUNG VON N-磷酸乙二醇甘氨酸
    • EP1401846A2
    • 2004-03-31
    • EP02754734.8
    • 2002-06-21
    • BASF AKTIENGESELLSCHAFT
    • VANDENMERSCH, HuguesVOSS , HartwigORSTEN, StefanWULFF, Christian
    • C07F9/38
    • C07F9/3813
    • The invention relates to a method for producing N-phosphonomethylglycine from an aqueous mixture containing N-phosphonomethylglycine, ammonium halogenides and alkali halides or earth alkali halides and optionally, organic impurities in a dissolved form. According to the invention, (a) the pH-value of the mixture is regulated to a value of 2 - 8, (b) the mixture is separated by means of a selective nano-filtration membrane, to obtain a retentate rich in N-phosphonomethylglycine and poor in halogenides and a permeate rich in halogenides and poor in N-phosphonomethylglycine and (c) the N-phosphonmethylglycine is prepared from the retentate. The inventive method enables the production of N-phosphonomethylglycine by simultaneously separating the halogenide salts thereof.
    • 本发明涉及由含有N-膦酰基甲基甘氨酸,卤化铵和碱金属卤化物或碱土金属卤化物和任选的溶解形式的有机杂质的含水混合物制备N-膦酰基甲基甘氨酸的方法。 根据本发明,(a)将混合物的pH值调节至2-8的值,(b)通过选择性纳米过滤膜分离混合物,以获得富含N- 膦酰基甲基甘氨酸和贫卤化物和富含卤化物的渗透物,而N-膦酰基甲基甘氨酸贫乏,和(c)由渗余物制备N-膦酰甲基甘氨酸。 本发明的方法能够通过同时分离其卤化物盐来生产N-膦酰基甲基甘氨酸。