Methods for the preparation of an N-alkyl-N-bis-(2-( 1,2-dicarboxy-ethoxy)-ethyl)-amine derivative are described, products of the methods as well as uses of the products. The derivative is prepared by reacting an alkali or earth alkali metal salt of maleic acid with an N-substituted diethanolamine, the reaction taking place with the two ethanol groups of the diamine while the substituent group bound to the N atom remains unaffected, or alternatively by first reacting diethanolamine with an alkali or earth alkali metal salt of maleic acid to yield N-bis-(2-(1,2-dicarboxy-ethoxy)-ethyl)-amine, which is then reacted with a substitution reagent to obtain the final product. The derivative is useful as chelating agents, e.g., in the bleaching of chemical or mechanical pulp or in textile bleaches containing hydrogen peroxide or a peracid, or as a calcium binder in detergents and cleaning agents.
本文描述了一种制备N-烷基-N-双(2-(1,2-二羧基-乙氧基)乙基)-胺衍
生物的方法,以及该方法的产物和产物的用途。该衍
生物是通过将
马来酸的碱
金属或碱土
金属盐与N-取代双
乙醇胺反应制备而成,反应发生在二胺基
乙醇的两个
乙醇基团上,而结合到N原子上的取代基团则不受影响,或者通过先将双
乙醇胺与
马来酸的碱
金属或碱土
金属盐反应得到N-双(2-(1,2-二羧基-乙氧基)乙基)-胺,然后再与取代试剂反应得到最终产物。该衍
生物可用作
螯合剂,例如在
化学或机械浆的漂白中或含
过氧化氢或过酸的纺织品漂白剂中,或作为清洁剂和洗涤剂中的
钙结合剂。