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    • 9. 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。
    • 10. 发明授权
    • Process for deinking waste paper
    • 废纸脱墨工艺
    • US07731818B2
    • 2010-06-08
    • US11570452
    • 2005-06-16
    • Bob HoracekJukka JäkäräMikael Svedman
    • Bob HoracekJukka JäkäräMikael Svedman
    • D21C5/02
    • D21C5/025Y02W30/648
    • The present invention relates to a process for deinking waste paper comprising treating the waste paper with a peroxide compound in an aqueous alkaline medium in the presence of a first polymer (A) comprising a Ca-binding polymer in the form of a polycarboxylate polymer and a second polymer (B) comprising a poly-alfa-hydroxyacrylic acid or a salt thereof or the corresponding polylactone, said process additionally comprising treating the waste paper with at least one non-ionic surfactant or with at least one combination of a non-ionic surfactant and a fatty acid or a salt thereof to promote ink detachment and/or ink removal.
    • 本发明涉及一种废纸脱墨方法,包括在含有多羧酸酯聚合物形式的Ca-结合聚合物的第一聚合物(A)存在下,在含水碱性介质中用过氧化物处理废纸, 第二聚合物(B),其包含聚α-羟基丙烯酸或其盐或相应的聚内酯,所述方法另外包括用至少一种非离子表面活性剂或至少一种非离子表面活性剂的组合处理废纸 和脂肪酸或其盐以促进油墨分离和/或油墨去除。