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    H.sub.2 O.sub.2 /alkaline bleaching of wood pulps
    25.
    发明授权
    H.sub.2 O.sub.2 /alkaline bleaching of wood pulps 失效
    H2O2 /碱性漂白木浆

    公开(公告)号：US5296100A

    公开(公告)日：1994-03-22

    申请号：US693800

    申请日：1991-04-30

    申请人： Michel Devic

    发明人： Michel Devic

    IPC分类号： D21C9/16

    CPC分类号： D21C9/163

    摘要： High-yield lignocellulosic wood pulps are bleached by (i) first pretreating such pulp with a complexing agent for metal ions and next washing the pretreated pulp, and then (ii) bleaching such pretreated/washed pulp with an initial amount of hydrogen peroxide in an alkaline medium, including adding a supplementary bleaching amount of hydrogen peroxide and a supplementary amount of an alkaline agent to the pulp over the course of the bleaching step (ii) without interrupting same, at a point in time when from 60% to 85% of the initial amount of hydrogen peroxide has been consumed, and such supplementary amount of hydrogen peroxide being equal to or less than the initial amount thereof.

    摘要翻译： （i）首先用金属离子的络合剂预处理这种纸浆并接着洗涤预处理的纸浆，然后（ii）用初始量的过氧化氢漂白这样的预处理/洗涤的纸浆，将漂白的高产木质纤维素木纸浆在 碱性介质，包括在漂白步骤（ii）的过程中向纸浆中添加辅助漂白量的过氧化氢和补充量的碱剂，而不中断其在60％至85％的 过氧化氢的初始量已被消耗，并且这种补充量的过氧化氢等于或小于其初始量。

    Method of peroxide bleaching of pulp pretreated with a sequestering agent then with a sulphite and reducing agent
    26.
    发明授权
    Method of peroxide bleaching of pulp pretreated with a sequestering agent then with a sulphite and reducing agent 失效
    用氨基酸和还原剂代替氨基酸的预处理浆液过氧化物的方法

    公开(公告)号：US5143581A

    公开(公告)日：1992-09-01

    申请号：US665531

    申请日：1991-03-06

    申请人： Michel Devic

    发明人： Michel Devic

    IPC分类号： D21C9/10 ,  D21C9/16

    CPC分类号： D21C9/1042 ,  D21C9/1057 ,  D21C9/1084 ,  D21C9/163

    摘要： A process for the manufacture of high-yield pulps bleached with the aid of hydrogen peroxide in alkaline medium, which consists in subjecting the pulp to be bleached successively to:(a) a pretreatment with the aid of a sequestering agent for metal ions, followed by a washing operation,(b) a treatment with sulphite and a reducing agent which is more electronegative than the sulphite ion, which act together and in a medium of initial pH between 7 and 12.5, followed by a washing operation to remove the sulphite ions and the reducing agent, and(c) to a bleaching treatment with the aid of hydrogen peroxide in alkaline medium in the presence of a quantity of silicate of between 0% and 1%.

    摘要翻译： 制造在碱性介质中借助于过氧化氢漂白的高产量纸浆的方法，该方法包括：将纸浆依次漂白：（a）借助于金属离子的螯合剂进行预处理，随后 通过洗涤操作，（b）用亚硫酸盐和还原剂进行处理，所述亚硫酸盐和还原剂比亚硫酸盐离子更负电性，所述亚硫酸盐离子一起起作用，并且在初始pH在7和12.5之间的介质中，然后进行洗涤操作以除去亚硫酸盐离子 和还原剂，以及（c）在碱性介质中，在0％至1％的硅酸盐存在下，借助过氧化氢进行漂白处理。

    Bleaching of vegetable pulps
    27.
    发明授权
    Bleaching of vegetable pulps 失效
    蔬菜浆的漂白

    公开(公告)号：US5094866A

    公开(公告)日：1992-03-10

    申请号：US533516

    申请日：1990-06-05

    申请人： Michel Devic

    发明人： Michel Devic

    IPC分类号： A23L1/308 ,  A23B7/06 ,  A23K1/14 ,  A23L1/214 ,  A23L1/227 ,  A23L1/277

    CPC分类号： A23L5/49 ,  A23L19/10

    摘要： Extracted vegetable pulps are bleached to a high degree of whiteness, thus rendering them more attractive as food supplements, by (a) treating such pulp in an acid medium at a pH of up to 2.5 and for a period of time of at least 10 minutes, (b) next washing the pulp thus treated to an efficiency of at least 80%, and (c) then reacting the washed pulp with an aqueous alkaline solution of hydrogen peroxide, in the presence of an H.sub.2 O.sub.2 stabilizer.

    摘要翻译： 提取的植物纸浆被漂白至高度的白度，因此通过（a）在酸性介质中处理至多2.5的pH并持续至少10分钟的时间，使它们作为食品添加剂更有吸引力 ，（b）接下来洗涤如此处理的纸浆至少80％的效率，和（c）然后在H 2 O 2稳定剂的存在下使洗涤的纸浆与过氧化氢的碱性水溶液反应。

    Process for the preparation of fluorinated compounds
    29.
    发明授权
    Process for the preparation of fluorinated compounds 有权
    氟化合物的制备方法

    公开(公告)号：US09255047B2

    公开(公告)日：2016-02-09

    申请号：US12602707

    申请日：2009-08-19

    申请人： Anne Pigamo ,  Michel Devic ,  Laurent Wendlinger

    发明人： Anne Pigamo ,  Michel Devic ,  Laurent Wendlinger

    IPC分类号： C07C17/354 ,  C07C17/25 ,  C07C21/18

    CPC分类号： C07C17/25 ,  C07C17/354 ,  C07C21/18 ,  Y02P20/582 ,  C07C19/08

    摘要： A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-1-propene which comprises the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1,2,3,3,3-pentafluoro-1-propene; (iii) hydrogenation of the 1,2,3,3,3-pentafluoro-1-propene obtained in the preceding stage to give 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the preceding stage to give 2,3,3,3-tetrafluoro-1-propene. Stages (ii) and (iv) are carried out using a water and potassium hydroxide mixture with the potassium hydroxide representing between 58 and 86% by weight of the mixture and at a temperature of between 110 and 180° C.

    摘要翻译： 本发明的主题是制备2,3,3,3-四氟-1-丙烯的方法，其包括以下步骤：（i）六氟丙烯的氢化，得到1,1,1,2,3 ，3-六氟丙烷; （ii）前段得到的1,1,1,2,3,3-六氟丙烷的脱氟化氢，得到1,2,3,3,3-五氟-1-丙烯; （iii）在前一阶段获得的1,2,3,3,3-五氟-1-丙烯的氢化，得到1,1,1,2,3-五氟丙烷; 和（iv）前一阶段获得的1,1,1,2,3-五氟丙烷的脱氟化氢，得到2,3,3,3-四氟-1-丙烯。 阶段（ii）和（iv）使用氢氧化钾与氢氧化钾混合物进行，其中氢氧化钾占混合物重量的58-86％，在110-180℃的温度下进行。