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    • 3. 发明申请
    • PROCESS TO PREPARE AMINO ACID-N, N-DIACETIC ACID COMPOUNDS
    • 制备氨基酸-N,N-二酸化合物的方法
    • WO2008065109A1
    • 2008-06-05
    • PCT/EP2007/062881
    • 2007-11-27
    • Akzo Nobel N.V.HEUS, MartinLAMMERS, HansVOLMER, Arie
    • HEUS, MartinLAMMERS, HansVOLMER, Arie
    • C07C227/40C07C229/16C07C229/24B01D61/44
    • C07C227/40B01D61/44C07C229/16C07C229/24
    • The invention relates to a process for the production of an amino acid having at least one secondary or tertiary amino group and three or more carboxyl groups or its salt with less than an equivalent of alkaline metal based on the number of carboxyl groups, said process comprising reducing alkali metal ions from an aqueous solution of an alkali metal salt of an amino acid having at least one secondary or tertiary amino group and three or more carboxyl groups and acidifying the amino carboxylate starting material by first performing a chemical acidification step using an organic or inorganic acid to get a compound in which at least one of the groups is protonated, and in a subsequent step further acidifying the amino carboxylate starting material and reducing alkali metal ions from an aqueous solution of the partially acidified alkali metal salt of the amino acid having at least one secondary or tertiary amino group and three or more carboxyl groups by electrodialysis, wherein the electrodialysis is performed using a hydrogen ion permselective membrane on the anode side and a cation-permeable membrane on the cathode side.
    • 本发明涉及一种制备具有至少一个仲氨基或叔氨基和三个或更多个羧基的氨基酸的方法或其盐,其基于羧基数目少于等于碱当量,所述方法包括 从具有至少一个仲或叔氨基和三个或多个羧基的氨基酸的碱金属盐的水溶液中还原碱金属离子,并且通过首先使用有机或不饱和羧酸盐进行化学酸化步骤酸化氨基羧酸盐原料 无机酸,得到其中至少一个基团被质子化的化合物,并且在随后的步骤中,进一步酸化氨基羧酸酯起始原料并从部分酸化的氨基酸的碱金属盐的水溶液中还原碱金属离子,其具有 至少一个仲或叔氨基和三个或更多个羧基通过电渗析,其中选择 使用阳极侧的氢离子选择性膜和阴极侧的阳离子透过膜进行透析。