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    METHOD FOR PRODUCING POLYSULFIDE BY USE OF ELECTROLYTIC OXIDATION
    1.
    发明公开
    METHOD FOR PRODUCING POLYSULFIDE BY USE OF ELECTROLYTIC OXIDATION 有权
    VERFAHREN ZUR HERSTELLUNG VON POLYSULFIDEN ELEKTROLYTISCHE OXIDATION

    公开(公告)号：EP1178009A4

    公开(公告)日：2004-10-06

    申请号：EP00905387

    申请日：2000-02-28

    申请人： ASAHI GLASS CO LTD ,  KAWASAKI KASEI CHEMICALS ,  JUJO PAPER CO LTD

    发明人： SHIMOHIRA TETSUJI ,  ANDOH TATSUYA ,  TANAKA JUNJI ,  WATANABE KEIGO ,  NANRI YASUNORI

    IPC分类号： C01B17/34 ,  C25B1/00 ,  C25B3/00 ,  C25B11/03 ,  D21C11/00 ,  D21C11/04

    CPC分类号： D21C11/0078 ,  D21C11/0057

    摘要： A method for producing polysulfides which comprises introducing a sulfide ion-containing solution into an anode compartment of an electrolytic bath comprising an anode compartment having a porous anode, a cathode compartment having a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment and effecting an electrolytic oxidation, to thereby produce polysulfide ions, characterized in that the porous anode is arranged in a manner such that an interstice is present between the porous anode and the diaphragm at least in a part of the diaphragm and an apparent volume of the porous anode is 60 % to 99 % relative to that of the anode compartment. The method can be used for producing a digesting solution having a high content of polysufide-sulfur, with markedly reduced by-production of a thiosulfate ion.

    摘要翻译： 一种生产多硫化物的方法，包括将含硫化物离子的溶液引入电解槽的阳极室中，该电解池包括具有多孔阳极的阳极室，具有阴极的阴极室和隔离阳极室和阴极室的隔膜，以及 进行电解氧化而生成多硫化物离子，其特征在于，所述多孔质阳极以在所述多孔质阳极与所述隔膜之间至少在所述隔膜的一部分上存在间隙的方式配置，所述多孔质体的表观体积 阳极相对于阳极室的温度为60％至99％。 该方法可用于制备具有高含量硫化物 - 硫的消化溶液，并显着减少硫代硫酸根离子的副产物。

    METHOD FOR PRODUCING POLYSULFIDE BY ELECTROLYTIC OXIDATION
    4.
    发明公开
    METHOD FOR PRODUCING POLYSULFIDE BY ELECTROLYTIC OXIDATION 有权
    VERFAHREN ZUR HERSTELLUNG VON POLYSULFIDEN DURCH ELEKTROLYTISCHE OXIDATION

    公开(公告)号：EP1018486A1

    公开(公告)日：2000-07-12

    申请号：EP99922510.5

    申请日：1999-05-27

    申请人： ASAHI GLASS COMPANY LTD. ,  Kawasaki Kasei Chemicals Ltd. ,  NIPPON PAPER INDUSTRIES CO., LTD.

    发明人： ANDOH, Tatsuya, Kawasaki Kasei Chemicals Ltd. ,  TANAKA, Junji, Kawasaki Kasei Chemicals Ltd. ,  SHIMOHIRA, Tetsuji, Asahi Glass Company Ltd.

    IPC分类号： C01B17/34

    CPC分类号： C01B17/34 ,  D21C11/0057 ,  D21C11/04

    摘要： It is an object of the present invention to produce a cooking liquor containing polysulfide sulfur at a high concentration from white liquor in a pulp production process with a high selectivity at a low electric power with very little production of thiosulfate ions as by-product. The present invention provides a method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, a cathode compartment provided with a cathode and a diaphragm partitioning the anode compartment and the cathode compartment, for electrolytic oxidation to obtain polysulfide ions, wherein at least the surface of said anode is made of nickel, and the porous anode has a physically continuous three-dimensional network structure.

    摘要翻译： 本发明的一个目的是在低产能下以极少的硫代硫酸根离子的产生产生在低产能下具有高选择性的纸浆生产过程中从白液中高浓度的多硫化硫。 本发明提供一种多硫化物的制造方法，其包括将含有硫化物离子的溶液引入电解槽的阳极室，所述阳极室包括设有多孔阳极的阳极室，设有阴极的阴极室和分隔阳极室 和阴极室，用于电解氧化以获得多硫化物离子，其中至少所述阳极的表面由镍制成，并且所述多孔阳极具有物理上连续的三维网络结构。

    Verfahren zur Herstellung von Natriumpolysulfiden aus den Elementen Natrium und Schwefel
    8.
    发明公开
    Verfahren zur Herstellung von Natriumpolysulfiden aus den Elementen Natrium und Schwefel 失效
    Verfahren zur Herstellung von Natriumpolysulfiden aus den Elementen Natrium und Schwefel。

    公开(公告)号：EP0326914A1

    公开(公告)日：1989-08-09

    申请号：EP89101220.5

    申请日：1989-01-25

    申请人： Degussa Aktiengesellschaft

    发明人： Bittner, Friedrich, Dr. ,  Hinrichs, Walter, Dr. ,  Hovestadt, Herbert, Dr. ,  Lange, Ludwig, Dr. ,  Splett, Erich

    IPC分类号： C01B17/34

    CPC分类号： B01J19/26 ,  B01J14/00 ,  B01J2219/00132 ,  B01J2219/00155 ,  B01J2219/00162 ,  B01J2219/00164 ,  C01B17/34 ,  C01P2006/80

    摘要： Die Erfindung betrifft ein Verfahren zur Herstellung von reinen wasser- und lösungsmittelfreien Natriumpolysulfiden direkt aus den Elementen Natrium und Schwefel. Dazu werden das Natrium und der Schwefel unter Schutzgas in einem dem gewünschten Polysulfid entsprechenden stöchiometrischen Verhältnis gleichzeitig an örtlich auseinanderliegenden Stellen eines zylindrischen Reaktors in eine in diesem vorgelegte Schmelze eines Polysulfids unter kräftigem Rühren in derart bemessenen Mengen eindosiert, daß die Reaktionsmischung im Eintragsbereich des Natriums im Zustand einer rührfähigen Suspension verbleibt und anschließend solange gerührt, bis das gewünschte Polysulfid gebildet ist.

    摘要翻译： 直接从元素钠和硫制备纯水和无溶剂的多硫化钠的方法。 为此，将钠和硫同时在保护气体下以对应于圆柱形反应器的位置分离位置处的所需多硫化物的化学计量比计量加入到引入到后者中的多硫化物的熔体中，其中以这样的量 使得钠的加成区域中的反应混合物保持在可搅拌的悬浮液的状态，然后搅拌直至形成所需的多硫化物。

    METHOD OF REGENERATING CATALYSTS USED FOR PRODUCTION OF POLYSULPHIDE COOKING LIQUORS
    9.
    发明公开
    METHOD OF REGENERATING CATALYSTS USED FOR PRODUCTION OF POLYSULPHIDE COOKING LIQUORS 审中-公开
    再生用于生产多硫化物吸收液的催化剂的方法

    公开(公告)号：EP3288680A1

    公开(公告)日：2018-03-07

    申请号：EP16726354.0

    申请日：2016-04-27

    申请人： Andritz Oy

    发明人： HÄMÄLÄINEN, Sanna ,  KITTILÄ, Pekka ,  POUKKA, Outi

    IPC分类号： B01J38/64 ,  B01J21/18 ,  C01B17/34

    CPC分类号： B01J21/20 ,  B01J21/18 ,  B01J38/62 ,  B01J38/64 ,  C01B17/34 ,  Y02P20/584

    摘要： A method of regenerating an activated carbon catalyst which is used in the production of polysulphide liquor. In the method, the catalyst is washed with a washing liquid in order to remove the sediment accumulated in the catalyst. According to the present invention, in this case, the activated carbon catalyst is regenerated most suitably by bringing it to a multi-stage washing which comprises at least one washing step in which the washing liquid used comprises sodium sulphide, and one washing step in which acidic washing liquid is used. The sulphur precipitate is peeled off using sodium sulphide, and the iron and other metals can be effectively removed by using an acidic washing, without damaging the catalyst.

    OXIDATION PROCESS FOR PRODUCING POTASSIUM THIOSULFATE
    10.
    发明公开
    OXIDATION PROCESS FOR PRODUCING POTASSIUM THIOSULFATE 审中-公开
    生产硫代硫酸钾的氧化方法

    公开(公告)号：EP3208234A1

    公开(公告)日：2017-08-23

    申请号：EP16156262.4

    申请日：2016-02-18

    申请人： Tessenderlo Kerley, Inc.

    发明人： HOJJATIE, Michael Massoud ,  LOCKHART, Constance Lynn Frank ,  DIMITRIADIS, Alexandros ,  CLARKSON, Mark P. ,  KOMINSKI, Harry Charles ,  VAN CAUWENBERGH, Jeroen ,  SHULT, Nicholas S. ,  GOLDSMITH, Adam T.

    IPC分类号： C01B17/64 ,  C01B17/34

    CPC分类号： C01B17/64 ,  C01B17/34 ,  C05D1/00

    摘要： An efficient process for preparation of potassium thiosulfate (K 2 S 2 O 3 ) is described. Potassium hydroxide (KOH) and elemental sulfur (S) are converted to potassium polysulfide, which is subsequently oxidized. The process allows using specifically designed process conditions such as mole ratios of potassium hydroxide to sulfur, and temperature, to obtain an optimized formulation of desired polysulfide, and a specifically designed set of conditions such as temperature, pressure, rate and duration of the oxidant during the oxidation conditions, to obtain a relatively high concentration of soluble potassium thiosulfate product with high purity, with relatively low amounts of byproducts. The manufacturing process can either be a batch process or a continuous process utilizing Continuous Stirred Tank Reactors (CSTR). The CSTR process is dependent on several design parameters, including pressure, and temperature optimization to avoid product instability. The resulting potassium thiosulfate is a beneficial fertilizer with high potassium content as a 50% liquid source of potassium.

    摘要翻译： 描述了制备硫代硫酸钾（K 2 S 2 O 3）的有效方法。 氢氧化钾（KOH）和元素硫（S）转化为多硫化钾，随后将其氧化。 该方法允许使用专门设计的工艺条件，例如氢氧化钾与硫的摩尔比和温度，以获得所需多硫化物的优化配方，以及特定设计的一组条件，例如氧化剂的温度，压力，速率和持续时间 氧化条件，以获得高纯度的相对高浓度的可溶性硫代硫酸钾产品，副产物量相对较低。 制造过程既可以是间歇过程，也可以是连续搅拌罐式反应器（CSTR）的连续过程。 CSTR过程依赖于几个设计参数，包括压力和温度优化以避免产品不稳定。 得到的硫代硫酸钾是钾含量高达50％的有益钾肥。