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298 条记录 (耗时 0.019 秒)

    Metal ligand containing bleaching compositions
    32.
    发明授权
    Metal ligand containing bleaching compositions 失效
    含有漂白组合物的金属配体

    公开(公告)号：US6099586A

    公开(公告)日：2000-08-08

    申请号：US119459

    申请日：1998-07-20

    申请人： Terrence J. Collins ,  Colin P. Horwitz

    发明人： Terrence J. Collins ,  Colin P. Horwitz

    IPC分类号： C07D257/02 ,  C07D257/10 ,  C11D3/39 ,  C11D3/395 ,  D06L3/02 ,  D21C9/10 ,  D21C9/16 ,  C01B15/00 ,  C01B15/055 ,  D06L3/06

    CPC分类号： D21C9/1036 ,  B01J31/006 ,  C07D257/10 ,  C11D3/3932 ,  B01J2231/70 ,  B01J2531/72 ,  B01J2531/842 ,  B01J31/184

    摘要： The invention provides a novel bleaching composition comprising:(a) an oxidatively stable bleach activator having the structure ##STR1## wherein Y.sub.1, Y.sub.3 and Y.sub.4 each represents a bridging group, i.e., zero, one, two or three carbon containing nodes for substitution while Y.sub.2 is a bridging group of at least one carbon containing node for substitution, each said node containing a C(R), C(R.sub.1)(R.sub.2), or a C(R).sub.2 unit and each R substituent is the same or different from the remaining R substituent and is selected from the group consisting of H, alkyl, cycloalkyl, cycloalkenyl, alkenyl, aryl, alkynyl, alkylaryl, halogen, alkoxy, or phenoxy, CH.sub.2 CF.sub.3, CF.sub.1 and combinations thereof, or form a substituted or unsubstituted benzene ring of which two carbon atoms in the ring form notes in the Y unit, or together with a paired R substituent bound to the same carbon atom form a cycloalkyl or cyloalkenyl ring, which may include an atom other than carbon, e.g., cyclopentyl or cyclohexyl; M is a transition metal with oxidation states of I, II, III, IV, V or VI, or selected IV from Groups VIA, VIIA, VIII, and IB; Q is any counterion which would balance the charge of the compound on a stoichiometric basis; L is any labile ligand; and,(b) an effective amount of a source of peroxy compound.

    摘要翻译： 本发明提供了一种新颖的漂白组合物，其包含：（a）具有结构的氧化稳定的漂白活化剂，其中Y 1，Y 3和Y 4各自表示桥连基团，即用于取代的0,1,2或3个含碳的结点，而Y2是 每个所述节点含有C（R），C（R 1）（R 2）或C（R）2单元，并且每个R取代基与剩余的碳原子的相同或不同） R选自H，烷基，环烷基，环烯基，烯基，芳基，炔基，烷基芳基，卤素，烷氧基或苯氧基，CH 2 CF 3，CF 1及其组合，或形成其取代或未取代的苯环 环中的两个碳原子在Y单元中形成音符，或与与相同碳原子结合的成对的R取代基一起形成环烷基或环烯基环，其可以包括除碳以外的原子，例如环戊基或环己基; M是氧化态为I，II，III，IV，V或VI的过渡金属，或VIA，VIIA，VIII和IB族选自IV; Q是以化学计量为基础平衡化合物的电荷的任何抗衡离子; L是任何不稳定的配体; 和（b）有效量的过氧化合物源。

    Process for peroxide bleaching of pulp using MgO particles
    33.
    发明授权
    Process for peroxide bleaching of pulp using MgO particles 失效
    使用MgO颗粒过氧化物漂白纸浆的方法

    公开(公告)号：US6056853A

    公开(公告)日：2000-05-02

    申请号：US981192

    申请日：1998-02-19

    申请人： Adam Hayden Vincent ,  Ian Alexander McLean

    发明人： Adam Hayden Vincent ,  Ian Alexander McLean

    IPC分类号： D21C9/10 ,  D21C9/16

    CPC分类号： D21C9/1036 ,  D21C9/163

    摘要： A process for peroxide bleaching of pulp using magnesium oxide as sole alkaline source wherein said pulp is bleached in the presence of hydrogen peroxide for a maximum period of 180 minutes and achievement of a maximum target ISO brightness of 65 in regard to freshly prepared pulp characterized in that said magnesium oxide is utilized as MgO particles having a particle size of 5-500 microns and a particle surface area (PSA) of between 20-60 m.sup.2 /g. By using such parameters, a peroxide bleaching process may be carried out most efficiently on a commercial scale.

    摘要翻译： PCT No.PCT / AU96 / 00354 Sec。 371日期1998年2月19日 102（e）1998年2月19日PCT PCT 1996年6月13日PCT公布。 公开号WO96 / 41917 日期1996年12月27日一种使用氧化镁作为唯一碱性来源的过氧化物漂白纸浆的方法，其中所述纸浆在过氧化氢存在下漂白最多180分钟，并达到关于 新鲜制备的纸浆，其特征在于所述氧化镁用作粒度为5-500微米，颗粒表面积（PSA）为20-60m 2 / g的MgO颗粒。 通过使用这样的参数，可以以商业规模最有效地进行过氧化物漂白处理。

    Bleaching compositions comprising sulfamates and borates or gluconates and processes
    34.
    发明授权
    Bleaching compositions comprising sulfamates and borates or gluconates and processes 失效
    包含氨基磺酸盐和硼酸盐或葡糖酸盐和方法的漂白组合物

    公开(公告)号：US5639348A

    公开(公告)日：1997-06-17

    申请号：US380592

    申请日：1995-01-30

    申请人： James H. Payton ,  Nicholas M. Canaris

    发明人： James H. Payton ,  Nicholas M. Canaris

    IPC分类号： D21C9/10 ,  D21C1/08

    CPC分类号： D21C9/1036

    摘要： Pulp bleaching processes employing peroxides and/or oxygen are improved by using stabilizing bleaching additives, preferably before the application of the peroxide and/or oxygen. The bleaching additives contain at least one sulfamic acid or sulfamate such as sodium sulfamate and gluconic acid or a soluble gluconate, or alternatively an alkali metal borate.

    摘要翻译： 使用稳定漂白添加剂，优选在施用过氧化物和/或氧之前，使用过氧化物和/或氧的纸浆漂白方法得到改善。 漂白添加剂含有至少一种氨基磺酸或氨基磺酸盐，例如氨基磺酸钠和葡萄糖酸或可溶性葡糖酸盐，或者碱金属硼酸盐。

    Process for bleaching paper pulp using caffeine or guanine as a viscosity stabilizers
    36.
    发明授权
    Process for bleaching paper pulp using caffeine or guanine as a viscosity stabilizers 失效
    使用咖啡因或鸟嘌呤漂白纸浆作粘度稳定剂的方法

    公开(公告)号：US4484980A

    公开(公告)日：1984-11-27

    申请号：US537889

    申请日：1983-09-30

    申请人： G. Graham Allan

    发明人： G. Graham Allan

    IPC分类号： D21C9/10 ,  D21C9/12 ,  D21C9/14

    CPC分类号： D21C9/1036

    摘要： A process for maintaining pulp viscosity during the bleaching stage or stages of pulp preparation in the manufacture of paper comprising adding an effective amount of caffeine or guanine prior to or during the bleaching stage. One example adds caffeine or guanine to one bleach stage of a chlorine bleaching sequence.

    摘要翻译： 在制造纸的漂白阶段或纸浆制备阶段期间维持纸浆粘度的方法，包括在漂白阶段之前或期间加入有效量的咖啡因或鸟嘌呤。 一个例子是在氯漂白序列的一个漂白阶段加入咖啡因或鸟嘌呤。

    Process for bleaching preoxidized paper pulp
    39.
    发明授权
    Process for bleaching preoxidized paper pulp 失效
    漂白预氧化纸浆的方法

    公开(公告)号：US4274912A

    公开(公告)日：1981-06-23

    申请号：US59256

    申请日：1979-07-19

    申请人： Jacques E. Carles ,  Michel Durand

    发明人： Jacques E. Carles ,  Michel Durand

    IPC分类号： D21C9/10 ,  D21C9/12

    CPC分类号： D21C9/1036

    摘要： The invention relates to a process for bleaching preoxidized paper pulp enabling a pulp having a very high degree of whiteness to be obtained with a limited number of treatment steps and enabling pollution to be reduced without degrading the qualities of the pulp; such a process essentially comprises the combination of the three successive treatment steps, namely:(a) a first step of hot chlorination with gaseous chlorine at a temperature of between about 30.degree. and 80.degree. C., and preferably between 35.degree. and 50.degree. C., in the presence of urea used at a rate of 0.5 to 5% by weight of the chlorine used, and preferably from 1 to 3%, with a concentration of pulp of between 3 and 30%, and a duration of retention of the chlorine of 30 seconds to 45 minutes;(b) a second step of alkaline extraction in the presence of an oxidizing agent of the hypochlorite or peroxide type, at a temperature of between about 30.degree. and 70.degree. C., and at a pH of between about 8 and 12, and preferably between 10.5 and 11.5, and(c) a third step of treatment with chlorine dioxide, at a temperature of between 60.degree. and 90.degree. C. and preferably between 70.degree. and 80.degree. C., at an initial pH of between 5 and 11, and preferably between 7 and 9,a recycling of the effluents of the second and/or the third treatment step for intermediate washing preceding the corresponding step being provided.

    摘要翻译： 本发明涉及一种用于漂白预氧化纸浆的方法，使得能够以有限数量的处理步骤获得具有非常高白度的纸浆，并且能够降低污染而不降低纸浆的质量; 这种方法主要包括三个连续处理步骤的组合，即：（a）在约30℃至80℃之间，优选35℃至50℃的温度下，用气态氯进行热氯化的第一步骤 在使用的尿素的存在下，以所使用的氯的0.5至5重量％的速率使用尿素，优选1至3％，纸浆浓度为3至30％，并且保留时间 氯气30秒〜45分钟; （b）在次氯酸或过氧化物的氧化剂存在下，在约30℃至70℃之间和约8至12℃之间的温度下碱性萃取的第二步骤，优选 在10.5和11.5之间，和（c）在二氧化氯处理温度在60-90℃之间，优选在70-80℃之间，初始pH为5到11之间的第三步骤 优选在7和9之间，在提供相应步骤之前用于中间洗涤的第二和/或第三处理步骤的废水的再循环。