利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

55 条记录 (耗时 0.02 秒)

    H.sub.2 O.sub.2 /alkaline bleaching of wood pulps
    34.
    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
    35.
    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
    36.
    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。

    METHOD FOR PRODUCING HYDROFLUOROCARBONS
    38.
    发明申请
    METHOD FOR PRODUCING HYDROFLUOROCARBONS 审中-公开
    生产氢氟烃的方法

    公开(公告)号：US20090270659A1

    公开(公告)日：2009-10-29

    申请号：US12302659

    申请日：2007-05-09

    申请人： Bertrand Collier ,  Stephanie Amerio ,  Michel Devic

    发明人： Bertrand Collier ,  Stephanie Amerio ,  Michel Devic

    IPC分类号： C07C21/18 ,  C07C19/08 ,  B01J12/00

    CPC分类号： B01J8/0446 ,  B01J2208/00274 ,  B01J2219/00006 ,  C07C17/206 ,  C07C17/21 ,  C07C17/383 ,  C07C19/08

    摘要： The invention relates to a method for producing hydrofluorocarbons. The method comprises a step of reacting at least one hydro(fluoro)chlorocarbon or chlorocarbon with hydrofluoric acid in a gaseous phase in the presence of a catalyst, and a step of separating fluorination reaction products from the mixture. The method is characterized in that the gaseous flow from the reaction is compressed by means of a compressor before being subjected to the separation step. The invention also relates to a device for implementing the method.

    摘要翻译： 本发明涉及一种生产氢氟烃的方法。 该方法包括在催化剂存在下使气态中至少一种氢（氟）氯化碳或氯代烃与氢氟酸反应的步骤和从混合物中分离氟化反应产物的步骤。 该方法的特征在于，在进行分离步骤之前，来自反应的气流通过压缩机被压缩。 本发明还涉及一种用于实现该方法的装置。