Method of preparing N-phosphonomethyl glycine
    1.
    发明授权
    Method of preparing N-phosphonomethyl glycine 失效
    制备N-膦酰基甲基甘氨酸的方法

    公开(公告)号:US06121485A

    公开(公告)日:2000-09-19

    申请号:US194953

    申请日:1998-12-07

    IPC分类号: C07F9/38

    CPC分类号: C07F9/3813

    摘要: To prepare N-phosphonomethyl glycine,a) aminomethylphosphonic acid or one of its salts in water, if necessary or desirable with the addition of lyes, is reacted with an alkali carbonate and/or alkali hydrogencarbonate or with carbon dioxide and a lye,b) the resulting alkali salt of N-phosphonomethylcarbamic acid is subsequently hydroxymethylated with formaldehyde,c) the salts, resulting from b), of N-hydroxymethyl-N-phosphonomethyl-carbamic acid, if necessary or desirable with addition of a lye, are reacted with hydrocyanic acid and/or a cyanide andd) the N-carboxy-N-phosphonomethylglyconitrile salts thus obtained are treated with acids and converted by means of hydrolysis and decarboxylation into N-phosphonomethyl glycine.In this way, it is possible to obtain excellent yields of high-purity N-phosphonomethyl glycine.

    摘要翻译: PCT No.PCT / EP97 / 03955 371 1998年12月7日第 102(e)日期1998年12月7日PCT 1997年7月22日PCT公布。 第WO98 / 03517号公报 日期1998年1月29日为了制备N-膦酰基甘氨酸,a)氨基甲基膦酸或其盐中的一种盐,如果需要或需要加入碱液,则与碱金属碳酸盐和/或碱金属碳酸盐或二氧化碳反应, 碱液,b)得到的N-膦酰基甲基氨基甲酸的碱金属盐随后用甲醛羟甲基化,c)由N-羟甲基-N-膦酰基甲基 - 氨基甲酸产生的盐,如果需要或需要,加入 碱液与氢氰酸和/或氰化物反应,d)由此得到的N-羧基-N-膦酰基甲基甘腈盐用酸处理并通过水解和脱羧转化为N-膦酰基甲基甘氨酸。 以这种方式,可以获得高纯度N-膦酰基甲基甘氨酸的良好产率。