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    SULFUR DIOXIDE SCRUBBING SYSTEM AND PROCESS FOR PRODUCING POTASSIUM PRODUCTS
    1.
    发明公开
    SULFUR DIOXIDE SCRUBBING SYSTEM AND PROCESS FOR PRODUCING POTASSIUM PRODUCTS 审中-公开
    二氧化硫洗涤系统和生产钾肥产品的方法

    公开(公告)号：EP3208237A1

    公开(公告)日：2017-08-23

    申请号：EP16156275.6

    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： C01D5/14 ,  C01B17/62 ,  C01B17/64

    CPC分类号： B01D53/502 ,  B01D53/78 ,  B01D2251/306 ,  B01D2251/604 ,  B01D2251/606 ,  B01D2258/0283 ,  C01B17/64 ,  C01D5/14 ,  C05D1/00 ,  C05D9/00

    摘要： The invention relates to a process for preparing potassium thiosulfate, potassium sulfite or potassium bisulfite comprising the following steps:
    Step (1a): providing a potassium hydroxide or potassium carbonate solution for neutralizing acid forming components such as dissolving SO 2 or H 2 S;
    Step (1b): providing an SO 2 contacting solution, containing at least some potassium sulfite or potassium bisulfite or potassium thiosulfate;
    Step (2): providing SO 2 gas;
    Step (3): reacting these to absorb the SO 2 gas and to form an intermediate reaction mixture comprising potassium sulfite, or potassium bisulfite or a mixture thereof, and optionally recovering the potassium sulfite, or potassium bisulfite or a mixture thereof, and/or optionally using steps 4 and 5;
    Step (4): adding sulfur or sulfide containing compound containing sulfur having the oxidation state of 0, -2 or of between 0 and -2 to the reaction mixture and optionally potassium hydroxide or potassium carbonate, and reacting the mixture under suitable conditions to form potassium thiosulfate; and
    Step (5): recovering the potassium thiosulfate, and optionally concentrating the potassium thiosulfate.

    摘要翻译： 本发明涉及制备硫代硫酸钾，亚硫酸钾或亚硫酸氢钾的方法，包括以下步骤：步骤（1a）：提供氢氧化钾或碳酸钾溶液用于中和酸形成组分，例如溶解SO 2或H 2 S; 步骤（1b）：提供含有至少一些亚硫酸钾或亚硫酸氢钾或硫代硫酸钾的SO 2接触溶液; 步骤（2）：提供SO 2气体; 步骤（3）：使它们反应以吸收SO 2气体并形成包含亚硫酸钾或亚硫酸氢钾或其混合物的中间反应混合物，并任选回收亚硫酸钾或亚硫酸氢钾或其混合物和/或任选地回收亚硫酸钾或亚硫酸氢钾或其混合物 使用步骤4和5; 步骤（4）：向反应混合物和任选的氢氧化钾或碳酸钾中加入硫或含硫的氧化态为0，-2或0和-2之间的硫的含化合物，并使混合物在合适的条件下反应以形成 硫代硫酸钾; 和步骤（5）：回收硫代硫酸钾，并任选地浓缩硫代硫酸钾。

    Process and apparatus for preparing calcium thiosulfate solution
    3.
    发明公开
    Process and apparatus for preparing calcium thiosulfate solution 有权
    Verfahren sowieGerätzur Herstellung vonCalciumtiosulfatlösungen

    公开(公告)号：EP1486460A1

    公开(公告)日：2004-12-15

    申请号：EP04252965.1

    申请日：2004-05-20

    申请人： Tessenderlo Kerley, Inc.

    发明人： Hojjatie, Michael Massoud ,  Kominski, Harry Charles III ,  Aspengren, Mark Daniel ,  Clarkson, Mark Pierce ,  Lockhart, Constance Lynn Frank

    IPC分类号： C01B17/64

    CPC分类号： B01J8/222 ,  B01J2219/0011 ,  C01B17/64

    摘要： An efficient process to produce calcium thiosulfate (CaS 2 O 3 ) from lime, sulfur and oxygen is described. By selecting appropriate process conditions such as mole ratios of lime to sulfur, temperature and pressure of the reaction process and the oxidation conditions, including rate and duration, the concentration of byproducts in the resulting suspension can be reduced to about 2% by weight or less. The solid particulate dispersion in the suspension tends to form a slimy solid suspension that is hard to filter if not treated properly. The suspension then can be acidified and treated with a flocculant. This agglomerates the solids into a floc that filters with ease. The resulting calcium thiosulfate is a clear liquid with concentrations achievable up to 29%.

    摘要翻译： 描述了从石灰，硫和氧产生硫代硫酸钙（CaS 2 O 3）的有效方法。 通过选择适当的工艺条件，例如石灰与硫的摩尔比，反应过程的温度和压力以及氧化条件（包括速率和持续时间），所得悬浮液中副产物的浓度可以降低至约2重量％以下 。 悬浮液中的固体颗粒分散体倾向于形成粘稠的固体悬浮液，如果不能正确处理则难以过滤。 然后将悬浮液酸化并用絮凝剂处理。 这将固体聚集成一个容易过滤的絮凝物。 所得到的硫代硫酸钙是一种透明液体，浓度可达29％。

    POLYSULFIDE COMPOSITIONS AND PROCESSES FOR MAKING SAME
    4.
    发明公开
    POLYSULFIDE COMPOSITIONS AND PROCESSES FOR MAKING SAME 审中-公开

    公开(公告)号：EP3819282A1

    公开(公告)日：2021-05-12

    申请号：EP19207225.4

    申请日：2019-11-05

    申请人： Tessenderlo Kerley, Inc.

    发明人： LOCKHART, Constance Lynn Frank ,  HOJJATIE, Michael Massoud ,  DIMITRIADIS, Alexandros

    IPC分类号： C05C9/00 ,  C07C319/22 ,  C22B34/34

    摘要： Aqueous polysulfide compositions comprise one or more polysulfides; wherein the amount of polysulfides in the composition is at least about 35% by weight, preferably at least about 40% by weight, more preferably at least about 45% by weight, even more preferably at least about 50% by weight; and wherein the amount of thiosulfate anions in the composition is at most about 15% by weight, preferably at most about 10% by weight, most preferably at most about 5% by weight, relative to the total weight of the composition. The compositions of the invention have many uses and are in particular useful in metal capturing, cyanide scavenging, soil remediation, water treatment, petroleum processing, leather processing, and the making of paper pulp. Processes for making lead to aqueous polysulfide compositions high in active ingredients and low in undesired by-products.

    DEPRESSION OF COPPER AND IRON SULFIDES IN MOLYBDENITE FLOTATION CIRCUITS
    9.
    发明公开
    DEPRESSION OF COPPER AND IRON SULFIDES IN MOLYBDENITE FLOTATION CIRCUITS 审中-公开
    遏制呕吐物在MOLYBDÄNITFLOTATIONSKREISLÄUFEN中发现

    公开(公告)号：EP3129515A1

    公开(公告)日：2017-02-15

    申请号：EP15777482.9

    申请日：2015-04-09

    申请人： Tessenderlo Kerley, Inc.

    发明人： DIMITRIADIS, Alexandros ,  COOK, Theodore E.

    IPC分类号： C22B34/34

    CPC分类号： B03D1/002 ,  B03D1/02 ,  B03D2201/06 ,  B03D2203/02

    摘要： A method of depressing copper sulfides and iron sulfides in a molybdenite floatation recovery process uses alkaline or alkaline earth polysulfides at high concentrate pH. The method of enriching molybdenite content from a slurry having molybdenite and at least one of iron sulfides and copper sulfides can include the steps of adding an effective amount of a depressing reagent selected from one or more alkaline poly sulfides, alkaline earth polysulfides, or a mixture thereof, to the slurry, wherein the pH of the slurry is greater than about 8.0; and passing a gas through the slurry to separate material by selective flotation, recovering the molybdonite from a froth.

    摘要翻译： 在辉钼矿浮选回收过程中抑制硫化铜和硫化铁的方法在高浓度pH下使用碱土金属或碱土金属多硫化物。 从具有辉钼矿和硫化铁和硫化铜中的至少一种的浆料中富集辉钼矿含量的方法可以包括以下步骤：加入有效量的选自一种或多种碱性多硫化物，碱土金属多硫化物或混合物的抑制剂 其中浆料的pH大于约8.0; 并通过选择性浮选将气体通过浆料分离成分离材料，从泡沫中回收钼铁矿。