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    • 1. 发明授权
    • Process for the peracid bleaching of chelated chemical pulp
    • 螯合化学纸浆过酸漂白工艺
    • US06264790B1
    • 2001-07-24
    • US09194349
    • 1998-11-24
    • Jukka JäkäräAarto ParenReijo AkselaIlkka Renvall
    • Jukka JäkäräAarto ParenReijo AkselaIlkka Renvall
    • D21C910
    • C07C229/24C01B15/037C07C217/08C11D3/33D21C9/1042D21C9/166
    • A process for the bleaching of chemical pulp, in which process the pulp is delignified with a peracid and additionally the pulp is chelated in order to bind heavy metals, such as Fe, Mn and/or Cu, into a chelate complex. According to the invention, the chelating is carried out using a chemical which has been selected from a group consisting of N-bis-((1,2-dicarboxy-ethoxy)-ethyl)-amine, N-bis-((1,2-dicarboxy-ethoxy)-ethyl)-aspartic acid and N-tris-((1,2-dicarboxy-ethoxy)-ethyl)-amine, as well as the alkali metal and earth-alkali metal salts thereof, and the peracid and chelating treatments are carried out simultaneously by combining the peracid and the said chelating chemical in the same solution phase. In the bleaching sequence the treatment according to the invention may follow, for example, an ozone delignification and precede an alkaline peroxide step, and in the latter case a magnesium compound, such as MgSO4, may be added to the pulp before the alkali step.
    • 用于漂白化学纸浆的方法,其中纸浆用过酸脱木质,另外纸浆被螯合以将重金属如Fe,Mn和/或Cu结合到螯合络合物中。 根据本发明,使用选自N-双 - ((1,2-二羧基 - 乙氧基) - 乙基) - 胺,N-双 - ((1,1-二甲基 - 2-二羧基 - 乙氧基) - 乙基) - 天冬氨酸和N-三 - ((1,2-二羧基 - 乙氧基) - 乙基) - 胺,以及其碱金属和碱土金属盐,以及过酸 并且通过将过酸和所述螯合化学品组合在相同的溶液相中同时进行螯合处理。 在漂白顺序中,根据本发明的处理可以遵循例如臭氧脱木质素,并且在碱性过氧化物步骤之前,并且在后一种情况下可以在碱性步骤之前将镁化合物如MgSO 4加入到纸浆中。
    • 2. 发明授权
    • Methods for the preparation of an N-bis-[2-(1,2-dicarboxy-ethoxy)-ethyl]amine derivative and products of the methods and their uses
    • 制备N-双 - [2-(1,2-二羧基 - 乙氧基) - 乙基]胺衍生物的方法及其用途的产物
    • US06590120B1
    • 2003-07-08
    • US09623727
    • 2000-09-08
    • Reijo AkselaIlkka RenvallAarto Paren
    • Reijo AkselaIlkka RenvallAarto Paren
    • C07C22900
    • C11D3/33C01B15/037C07C213/06C11D1/10D21C9/1042G03C5/3053G03C5/44G03C7/42C07C217/08
    • 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.
    • 描述了N-烷基-N-双 - (2-(1,2-二羧基 - 乙氧基) - 乙基) - 胺衍生物的制备方法,该方法的产物以及产物的用途。 该衍生物通过使马来酸的碱金属或碱土金属盐与N-取代的二乙醇胺反应制备,反应与二胺的两个乙醇基发生,而与N原子结合的取代基保持不受影响,或者替代地, 首先使二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,然后与取代试剂反应,得到最终 产品。 该衍生物可用作螯合剂,例如漂白化学或机械纸浆或在含有过氧化氢或过酸的织物漂白剂中,或作为洗涤剂和清洁剂中的钙粘合剂。