利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

13 条记录 (耗时 0.02 秒)

    Method for scavenging mercury
    3.
    发明授权
    Method for scavenging mercury 有权
    清除汞的方法

    公开(公告)号：US08007749B2

    公开(公告)日：2011-08-30

    申请号：US12792135

    申请日：2010-06-02

    申请人： Shih-Ger Chang ,  Shou-Heng Liu ,  Zhao-Rong Liu ,  Naiqiang Yan

    发明人： Shih-Ger Chang ,  Shou-Heng Liu ,  Zhao-Rong Liu ,  Naiqiang Yan

    IPC分类号： B01D53/64

    CPC分类号： B01D53/64 ,  B01D2257/602

    摘要： Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting of flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

    摘要翻译： 本文公开了一种从气流中除去汞的方法，包括使气流与包含溴，溴氯化物，溴化硫，二氯化硫或一氯化硫的吸气剂组合物及其混合物接触。 在一个优选实施方案中，吸气剂组合物被吸附到吸附剂上。 吸附剂可以选自飞灰，石灰石，石灰，硫酸钙，亚硫酸钙，活性炭，木炭，硅酸盐，氧化铝及其混合物。 优选的是飞灰，活性炭和二氧化硅。

    Process for the removal of acid forming gases from exhaust gases and production of phosphoric acid
    4.
    发明授权
    Process for the removal of acid forming gases from exhaust gases and production of phosphoric acid 失效
    从废气中除去酸性气体和生产磷酸的工艺

    公开(公告)号：US5106601A

    公开(公告)日：1992-04-21

    申请号：US518722

    申请日：1990-05-04

    申请人： Shih-Ger Chang ,  David K. Liu

    发明人： Shih-Ger Chang ,  David K. Liu

    IPC分类号： B01D53/60

    CPC分类号： B01D53/60

    摘要： Exhaust gases are treated to remove NO or NO.sub.x and SO.sub.2 by contacting the gases with an aqueous emulsion or suspension of yellow phosphorous preferably in a wet scrubber. The addition of yellow phosphorous in the system induces the production of O.sub.3 which subsequently oxidizes NO to NO.sub.2. The resulting NO.sub.2 dissolves readily and can be reduced to form ammonium ions by dissolved SO.sub.2 under appropriate conditions. In a 20 acfm system, yellow phosphorous is oxidized to yield P.sub.2 O.sub.5 which picks up water to form H.sub.3 PO.sub.4 mists and can be collected as a valuable product. The pressure is not critical, and ambient pressures are used. Hot water temperatures are best, but economics suggest about 50.degree. C. The amount of yellow phosphorus used will vary with the composition of the exhaust gas, less than 3% for small concentrations of NO, and 10% or higher for concentrations above say 1000 ppm. Similarly, the pH will vary with the composition being treated, and it is adjusted with a suitable alkali. For mixtures of NO.sub.x and SO.sub.2, alkalis that are used for flue gas desulfurization are preferred. With this process, better than 90% of SO.sub.2 and NO in simulated flue gas can be removed. Stoichiometric ratios (P/NO) ranging between 0.6 and 1.5 were obtained.

    摘要翻译： 通过使气体与水性乳液或黄磷的悬浮液接触，优选在湿式洗涤器中处理废气以除去NO或NO x和SO 2。 在系统中加入黄色磷诱导O3的产生，其随后将NO氧化成NO 2。 所得的NO 2容易溶解并且可以在合适的条件下通过溶解的SO 2还原形成铵离子。 在20 acfm系统中，黄磷被氧化产生P2O5，其吸收水以形成H 3 PO 4雾，并且可以作为有价值的产物收集。 压力并不重要，并且使用环境压力。 热水温度最好，但经济学表明约为50℃。所用的黄磷量将随着废气的组成而变化，对于小浓度的NO，小于3％，高于1000的浓​​度为10％以上 ppm。 类似地，pH将随待处理的组合物而变化，并用合适的碱调节。 对于NOx和SO 2的混合物，优选用于烟道气脱硫的碱。 通过这个过程，可以去除模拟烟道气中优于SO2和NO的90％。 化学计量比（P / NO）为0.6〜1.5。

    Process for the removal of acid forming gases from exhaust gases
    5.
    发明授权
    Process for the removal of acid forming gases from exhaust gases 失效
    从排气中去除酸形成气体的方法

    公开(公告)号：US5164167A

    公开(公告)日：1992-11-17

    申请号：US261229

    申请日：1988-10-24

    申请人： Shih-Ger Chang ,  David K. Liu

    发明人： Shih-Ger Chang ,  David K. Liu

    IPC分类号： B01D53/60

    CPC分类号： B01D53/60

    摘要： Exhaust gases are treated to remove NO or NO.sub.x and SO.sub.2 by contacting the gases with an aqueous emulsion or suspension of yellow phosphorus preferably in a wet scrubber. The pressure is not critical, and ambient pressures are used. Hot water temperatures are best, but economics suggest about 50.degree. C. are attractive. The amount of yellow phosphorus used will vary with the composition of the exhaust gas, less than 3% for small concentrations of NO, and 10% or higher for concentrations above say 1000 ppm. Similarly, the pH will vary with the composition being treated, and it is adjusted with a suitable alkali. For mixtures of NO.sub.x and SO.sub.2, alkalis that are used for flue gas desulfurization are preferred. With this process, 100% of the by-products created are usable, and close to 100% of the NO or NO and SO.sub.2 can be removed in an economic fashion.

    Method of removing nitrogen monoxide from a nitrogen monoxide-containing gas using a water-soluble iron ion-dithiocarbamate, xanthate or thioxanthate
    6.
    发明授权
    Method of removing nitrogen monoxide from a nitrogen monoxide-containing gas using a water-soluble iron ion-dithiocarbamate, xanthate or thioxanthate 失效
    使用水溶性铁离子 - 二硫代氨基甲酸盐，黄原酸盐或硫代黄酸盐从一氧化氮气体中除去一氧化氮的方法

    公开(公告)号：US4810474A

    公开(公告)日：1989-03-07

    申请号：US89285

    申请日：1987-08-25

    申请人： David K. Liu ,  Shih-Ger Chang

    发明人： David K. Liu ,  Shih-Ger Chang

    IPC分类号： B01D53/56 ,  B01D53/77 ,  C01B21/00

    CPC分类号： B01D53/56

    摘要： A method of removing nitrogen monoxide from a nitrogen monoxide-containing gas, which method comprises:(a) contacting a nitrogen oxide-containing gas with an aqueous solution of water soluble organic compound-iron ion chelate of the formula: ##STR1## wherein the water-soluble organic compound is selected from compounds of the formula: ##STR2## wherein: R is selected from hydrogen or an organic moiety having at least one polar functional group;Z is selected from oxygen, sulfur, or --N--A wherein N is nitrogen and A is hydrogen or lower alkyl having from one to four carbon atoms; andM is selected from hydrogen, sodium or potassium; andn is 1 or 2, in a contacting zone for a time and at a temperature effective to reduce the nitrogen monoxide. These mixtures are useful to provide an unexpensive method of removing NO from gases, thus reducing atmospheric pollution from flue gases.

    摘要翻译： 一种从含一氧化氮气体中除去一氧化氮的方法，该方法包括：（a）使含氮氧化物的气体与下式的水溶性有机化合物 - 铁离子螯合物的水溶液接触： ）其中所述水溶性有机化合物选自下式的化合物：其中：R选自氢或具有至少一个极性官能团的有机部分; Z选自氧，硫或-N-A，其中N是氮，A是氢或具有1-4个碳原子的低级烷基; M选自氢，钠或钾; 并且n为1或2，在接触区中一段时间​​和有效降低一氧化氮的温度。 这些混合物可用于提供从气体中除去NO的不便的方法，从而减少烟道气中的大气污染。

    Process for the combined removal of SO.sub.2 and NO.sub.x from flue gas
    7.
    发明授权
    Process for the combined removal of SO.sub.2 and NO.sub.x from flue gas 失效

    公开(公告)号：US4732744A

    公开(公告)日：1988-03-22

    申请号：US923541

    申请日：1986-10-27

    申请人： Shih-Ger Chang ,  David K. Liu ,  Elizabeth A. Griffiths ,  David Littlejohn

    发明人： Shih-Ger Chang ,  David K. Liu ,  Elizabeth A. Griffiths ,  David Littlejohn

    IPC分类号： B01D53/60 ,  C01B21/00 ,  C01B17/00

    CPC分类号： B01D53/60

    摘要： The present invention in one aspect relates to a process for the simultaneous removal of NO.sub.x and SO.sub.2 from a fluid stream comprising mixtures thereof and in another aspect relates to the separation, use and/or regeneration of various chemicals contaminated or spent in the process and which includes the steps of:(A) contacting the fluid stream at a temperature of between about 105.degree. and 180.degree. C. with a liquid aqueous slurry or solution comprising an effective amount of an iron chelate of an amino acid moiety having at least one --SH group;(B) separating the fluid stream from the particulates formed in step (A) comprising the chelate of the amino acid moiety and fly ash;(C) washing and separating the particulates of step (B) with an aqueous solution having a pH value of between about 5 to 8;(D) subsequently washing and separating the particulates of step (C) with a strongly acidic aqueous solution having a pH value of between about 1 to 3;(E) washing and separating the particulates of step (D) with an basic aqueous solution having a pH value of between about 9 to 12;(F) optionally adding additional amino acid moiety, iron (II) and alkali to the aqueous liquid from step (D) to produce an aqueous solution or slurry similar to that in step (A) having a pH value of between about 4 to 12; and(G) recycling the aqueous slurry of step (F) to the contacting zone of step (A).Steps (D) and (E) can be carried out in the reverse sequence, however the preferred order is (D) and then (E).In another preferred embodiment the present invention provides a process for the removal of NO.sub.x, SO.sub.2 and particulates from a fluid stream which includes the steps of (A) injecting into a reaction zone an aqueous solution itself comprising (i) an amino acid moiety selected from those described above; (ii) iron (II) ion; and (iii) an alkali, wherein the aqueous solution has a pH of between about 4 and 11; followed by solids separation and washing as is described in steps (B), (C), (D) and (E) above. The overall process is useful to reduce acid rain components from combustion gas sources.

    Metal regeneration of iron chelates in nitric oxide scrubbing
    9.
    发明授权
    Metal regeneration of iron chelates in nitric oxide scrubbing 失效
    一氧化氮洗涤中铁螯合物的金属再生

    公开(公告)号：US5658545A

    公开(公告)日：1997-08-19

    申请号：US412706

    申请日：1995-03-29

    申请人： Shih-Ger Chang ,  David Littlejohn ,  Yao Shi

    发明人： Shih-Ger Chang ,  David Littlejohn ,  Yao Shi

    IPC分类号： B01D53/56 ,  B01D53/96 ,  C01C1/04 ,  C21B3/04 ,  B01J8/00

    CPC分类号： B01D53/96 ,  B01D53/56 ,  C01C1/04 ,  C21B3/04 ,  Y02P10/143 ,  Y02P10/216 ,  Y02W30/542

    摘要： The present invention relates to a process of using metal particles to reduce NO to NH.sub.3. More specifically, the invention concerns an improved process to regenerate iron (II) (CHELATE) by reduction of iron (II) (CHELATE) (NO) complex, which process comprises: a) contacting an aqueous solution containing iron (II) (CHELATE) (NO) with metal particles at between about 20.degree. and 90.degree. C. to reduce NO present, produce ammonia or an ammonium ion, and produce free iron (II) (CHELATE) at a pH of between about 3 and 8. The process is useful to remove NO from flue gas and reduce pollution.

    摘要翻译： 本发明涉及使用金属颗粒将NO还原成NH 3的方法。 更具体地，本发明涉及通过还原铁（II）（CHELATE）（NO）络合物来再生铁（II）（CHELATE）的改进方法，该方法包括：a）使含有铁（II）（CHELATE） ）（NO）与金属颗粒在约20-90℃之间以减少NO存在，产生氨或铵离子，并且在约3至8的pH下产生游离的铁（II）（CHELATE）。 过程有助于从烟道气中去除NO，减少污染。