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    Continuous process for scrubbing so{11 {11 from a gas stream with h{11 {11 regeneration
    31.
    发明授权
    Continuous process for scrubbing so{11 {11 from a gas stream with h{11 {11 regeneration 失效
    连续流程，因此{11 {11从气体流与H {11 {11再生

    公开(公告)号：US3764653A

    公开(公告)日：1973-10-09

    申请号：US3764653D

    申请日：1971-06-24

    Applicant: UNIVERSAL OIL PROD CO

    Inventor： URBAN P

    IPC: B01D53/50 ,  C01B17/06 ,  C01B17/16 ,  C01B17/34 ,  C01B17/00

    CPC classification number: C01B17/34 ,  B01D53/501 ,  C01B17/06 ,  C01B17/164

    Abstract: An input gas stream containing SO2 is continuously treated in order to remove a substantial portion of the SO2 therefrom by the steps of: (a) scrubbing the input gas stream with an aqueous absorbent stream containing an alkaline reagent; (b) treating the resulting rich absorbent stream with a reducing agent at conditions selected to convert the sulfite compound contained therein to the corresponding thiosulfate compound; (c) catalytically reacting the resulting thiosulfate compound with hydrogen at reduction conditions selected to produce the corresponding sulfide compound; (d) stripping hydrogen sulfide from the resulting solution to form a regenerated aqueous absorbent stream; and, thereafter, (e) passing at least a portion of the regenerated absorbent stream to the scrubbing step. The principal utility of this scrubbing process is associated with the problem of continuously removing a sulfur dioxide contaminant from the flue or stack gas streams such as are typically produced in modern electrical power generating stations in order to abate a serious pollution problem and to enable the safe, nonpolluting burning of high sulfur fuels. Key features of this process are: the selective conversion of the sulfite compound obtained from the scrubbing step to the corresponding thiosulfate compound in the preliminary treatment step, the subsequent reduction of the thiosulfate compound to the corresponding sulfide compound in a highly efficient economic and selective manner, the minimization of undesired sulfate by-products during both of these conversion steps and the use of a relatively cheap, continuously regenerated absorbent which has a high capacity for SO2 as well as a high efficiency for SO2 removal.

    Abstract translation: 连续处理含有SO 2的输入气流，以通过以下步骤除去大部分SO 2：（a）用含有碱性试剂的水性吸收剂流洗涤输入气流; （b）在选择用于将其中所含的亚硫酸盐化合物转化为相应的硫代硫酸盐化合物的条件下用还原剂处理所得的富吸收物流; （c）将所得硫代硫酸盐化合物与氢气在还原条件下催化反应，选择生成相应的硫化物; （d）从所得溶液中除去硫化氢以形成再生的含水吸收剂流; 然后（e）将再生的吸收剂流的至少一部分通入洗涤步骤。 这种洗涤过程的主要用途与从烟道或烟道气流中连续除去二氧化硫污染物的问题有关，例如通常在现代发电站中产生，以消除严重的污染问题，并使安全 ，无污染燃烧高硫燃料。 该方法的主要特征是：在预处理步骤中将从洗涤步骤获得的亚硫酸盐化合物选择性转化为相应的硫代硫酸盐化合物，随后以高效的经济和选择性方式将硫代硫酸盐化合物还原成相应的硫化物化合物 ，在这两个转化步骤期间使不期望的硫酸盐副产物最小化，以及使用具有高的SO2容量的相对廉价的，连续再生的吸收剂以及除去SO 2的高效率。

    Polysulfide Compositions and Processes for Making Same
    35.
    发明申请
    Polysulfide Compositions and Processes for Making Same 有权

    公开(公告)号：US20220396483A1

    公开(公告)日：2022-12-15

    申请号：US17621242

    申请日：2020-06-22

    Applicant: Tessenderlo Kerley, Inc.

    Inventor： Constance Lockhart ,  Michael Hojjatie ,  Alexandros Dimitriadis

    IPC: C01B17/34

    Abstract: An aqueous polysulfide composition comprises one or more inorganic polysulfides, wherein the amount of polysulfides in the composition is at least 30% by weight, preferably at least 35% by weight, more preferably at least 40% by weight, and wherein the amount of thiosulfate anions in the composition is at most 5% by weight, relative to the total weight of the composition. In one embodiment the weight ratio of polysulfides to thiosulfates in the aqueous composition is from 55/1 to 1.5/1. In another embodiment, the aqueous polysulfide composition has a pH of at least 10. A process for preparing an aqueous polysulfide composition comprises reacting a sulfide salt (c) with elemental sulfur to form one or more polysulfide salts. The compositions have many uses and are in particular useful in metal capturing, cyanide scavenging, soil remediation, water treatment, petroleum processing, leather processing, and making of paper pulp.

    Process for producing sulfur-containing organosilicon compounds and synthetic intermediates thereof
    38.
    发明授权
    Process for producing sulfur-containing organosilicon compounds and synthetic intermediates thereof 有权
    含硫有机硅化合物的制造方法及其合成中间体

    公开(公告)号：US6066752A

    公开(公告)日：2000-05-23

    申请号：US288782

    申请日：1999-04-09

    Applicant: Toshikazu Takata ,  Motoki Kitagawa ,  Masato Tabuchi ,  Nobuo Yamada

    Inventor： Toshikazu Takata ,  Motoki Kitagawa ,  Masato Tabuchi ,  Nobuo Yamada

    IPC: C07F7/18 ,  C01B17/22 ,  C01B17/34 ,  C07F7/08

    CPC classification number: C01B17/34 ,  C01B17/22 ,  C07F7/1892 ,  C01P2006/82

    Abstract: An object of the present invention is to provide a method of obtaining high-purity sulfur-containing organosilicon compounds having polysulfide structure in a simple manner without treatment at high temperatures or under vacuum.According to the present invention, sulfur-containing organosilicon compounds represented by the formula (R.sup.1 --O).sub.3 --Si--R.sup.2 --S.sub.x --R.sup.2 --Si--(O--R.sup.1).sub.3 is obtained by reacting sulfur, an alkali metal and halogenoalkoxysilane represented by the formula (R.sup.1 --O).sub.3 --Si--R.sup.2 --X (wherein R.sup.1 is a monovalent C.sub.1-5 hydrocarbon, R.sup.2 is a divalent C.sub.1-9 hydrocarbon, X is a halogen, and x is an integral number of 1 to 8).

    Abstract translation: 本发明的目的是提供一种在高温或真空下不经处理地以简单的方式获得具有多硫结构的高纯度含硫有机硅化合物的方法。 根据本发明，由式（R1-O）3-Si-R2-Sx-R2-Si-（O-R1）3表示的含硫有机硅化合物是通过硫，碱金属和卤代烷氧基硅烷 通式（R1-O）3-Si-R2-X（其中R1是一价C1-5烃，R2是二价C1-9烃，X是卤素，x是1到8的整数） ）。

    Method for preparing wetproofed catalyst particles and particles produced thereby
    39.
    发明授权
    Method for preparing wetproofed catalyst particles and particles produced thereby 失效
    制备耐湿催化剂颗粒的方法和由此制备的颗粒

    公开(公告)号：US4073748A

    公开(公告)日：1978-02-14

    申请号：US761264

    申请日：1977-01-21

    Applicant: Glendon W. Brown ,  Mary J. Fine ,  Larry O. Hill

    Inventor： Glendon W. Brown ,  Mary J. Fine ,  Larry O. Hill

    IPC: C01B17/34 ,  B01J21/18 ,  B01J31/06 ,  B01J33/00 ,  B01J35/00

    CPC classification number: B01J35/00 ,  B01J21/18 ,  B01J31/06 ,  B01J33/00

    Abstract: Carbon particles non-uniformly and non-continuously coated with polytetrafluoroethylene (PTFE) are produced by adding a PTFE emulsion to the carbon particles at a rate of less than approximately 100 ml/100 grams. The result is a mixture of PTFE coated carbon particles, some having a higher weight percent PTFE resin thereon and others having a lower weight percent PTFE resin thereon. Such a mixture of non-uniformly coated particles gives improved reaction efficiency when used as a solid catalyst in a packed bed tower reactor through which fluid reactants are flowed.

    Abstract translation: 通过以小于约100毫升/ 100克的速率向PTFE颗粒中加入PTFE乳液来生产不均匀且不连续涂覆聚四氟乙烯（PTFE）的碳颗粒。 结果是PTFE涂覆的碳颗粒的混合物，一些具有较高重量百分比的PTFE树脂，其它具有较低重量百分比的PTFE树脂。 当在填充床塔式反应器中用作流体反应物流动的固体催化剂时，这种非均匀涂覆颗粒的混合物提供了改善的反应效率。

    Production of polysulfide with PTFE coated catalyst
    40.
    发明授权
    Production of polysulfide with PTFE coated catalyst 失效
    用PTFE涂层催化剂生产多硫化物

    公开(公告)号：US4024229A

    公开(公告)日：1977-05-17

    申请号：US468471

    申请日：1974-05-09

    Applicant: Glen C. Smith ,  Frederick W. Sanders

    Inventor： Glen C. Smith ,  Frederick W. Sanders

    IPC: C01B17/34 ,  C01D1/04 ,  C01B17/42

    CPC classification number: C01B17/34 ,  C01D1/04

    Abstract: Sodium polysulfide is prepared by the oxidation of sodium sulfide or sodium hydrosulfide, and by using new procedures and systems described, the production of thiosulfate can be markedly reduced and, in some cases, eliminated. The oxidant is air, oxygen or oxygen in mixture with other gases, the reductant is aqueous sodium sulfide or sodium hydrosulfide and the reaction is carried out with both reactants in non-flooded contact with a solid catalyst material, of which a typical example is a particulate carbon treated with polytetrafluoroethylene (PTFE). The reaction is typically conducted at atmospheric pressure and without the application of heat, with the oxidant and the reductant being in interfacial contact with each other, but only, insofar as possible, at sites where both are simultaneously in contact with a catalyst which is prevented from being flooded by either the oxidant or reductant. Sodium polysulfide and sodium hydroxide are produced, and are useable in treatment of lignocellulose materials. Various arrangements, materials and processes are also disclosed.

    Abstract translation: 通过硫化钠或硫氢化钠的氧化制备多硫化钠，并且通过使用所述的新方法和体系，硫代硫酸盐的生产可以显着降低，并且在某些情况下被消除。 氧化剂是与其他气体混合的空气，氧气或氧气，还原剂是硫化钠水溶液或氢硫化钠，并且两种反应物都与固体催化剂材料非淹没接触进行反应，其典型的例子是 用聚四氟乙烯（PTFE）处理的颗粒碳。 反应通常在大气压下进行并且不施加热量，氧化剂和还原剂彼此界面接触，但只要尽可能在两者同时与催化剂接触的位置处被阻止 不被氧化剂或还原剂淹没。 生产多硫化钠和氢氧化钠，可用于木质纤维素材料的处理。 还公开了各种布置，材料和工艺。

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