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2. 发明授权

US06334944B1 Process for producing an amino acid-N,N-diacetic acid and its salts 有权
标题翻译：制备氨基酸-N，N-二乙酸及其盐的方法
公开(公告)号：US06334944B1
公开(公告)日：2002-01-01
申请号：US09492181
申请日：2000-01-27
申请人： Nobuyoshi Nambu , Masanori Furukawa , Makoto Saito , Tohru Yamamoto
发明人： Nobuyoshi Nambu , Masanori Furukawa , Makoto Saito , Tohru Yamamoto
IPC分类号： C25B304
CPC分类号： C07C227/18 , B01D61/44 , C07C227/40 , C11D3/33 , C07C229/16 , C07C229/24
摘要： An amino acid-N,N-diacetic acid (AADA) or its salt with an equivalent or less of an alkali metal is produced by reducing, through electrodialysis, alkali metal ions from an aqueous solution of the alkali metal salt of an AADA. By this configuration, an AADA salt can be produced in a much higher yield than conventional equivalents without requiring a regeneration operation of a resin as in the use of an ion exchange resin or without requiring crystallization-separation of crystals of the AADA salt as in the addition of an organic solvent. A salt of an amino acid-N,N-diacetic acid is also produced by reacting an AADA with any of metal oxides, metal hydroxides, metal carbonates, metal hydrogencarbonates, ammonium hydroxide, ammonium carbonate, ammonium hydrogencarbonate or organic amine compounds. By this configuration, a metal salt, ammonium salt or organic amine salt of an AADA can be produced with efficiency without the formation of by-products.
摘要翻译：通过电渗析从AADA的碱金属盐的水溶液中还原碱金属离子，生成氨基酸-N，N-二乙酸（AADA）或其等同物或碱金属的盐。通过这种构造，可以以比常规等同物高得多的产率生产AADA盐，而不需像使用离子交换树脂那样进行树脂的再生操作，或者不需要像在加入有机溶剂。氨基酸-N，N-二乙酸的盐也通过使AADA与金属氧化物，金属氢氧化物，金属碳酸盐，金属碳酸氢盐，氢氧化铵，碳酸铵，碳酸氢铵或有机胺化合物中的任一种反应而产生。通过这种构造，可以有效地生产AADA的金属盐，铵盐或有机胺盐，而不会形成副产物。

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