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42 条记录 (耗时 0.017 秒)

    Apparatus to remove acid gases from a flue gas
    2.
    发明授权
    Apparatus to remove acid gases from a flue gas 失效
    从烟道气中除去酸性气体的装置

    公开(公告)号：US5397549A

    公开(公告)日：1995-03-14

    申请号：US76944

    申请日：1993-06-16

    申请人： Dave B. Newman

    发明人： Dave B. Newman

    IPC分类号： B01D53/50 ,  B01D53/60 ,  C01F11/38 ,  C01F11/46 ,  B01D50/00 ,  C01B17/00

    CPC分类号： B01D53/501 ,  B01D53/504 ,  B01D53/60 ,  C01F11/38 ,  C01F11/464 ,  Y10S261/74

    摘要： A method and apparatus to remove acid gases from a flue gas containing sulphur dioxide and oxides of nitrogen. There is a heat exchanger to reduce incoming flue gas temperatures. Gas from the heat exchanger are oxidized to their higher oxidation state. A reaction tower receives the oxidized gases. The reaction tower includes a reaction surface. There is a first inlet for gases adjacent the base of the reaction tower and a second inlet for a basic compound in the reaction tower above the first inlet. The arrangement allows counter current flows of the gas and the basic compound to enable scrubbing of the gas. There is an outlet for scrubbed gas and an outlet for liquids at the tower base.

    摘要翻译： 从含有二氧化硫和氮氧化物的烟道气中除去酸性气体的方法和装置。 有一个换热器可以减少进气烟气的温度。 来自热交换器的气体被氧化成更高的氧化态。 反应塔接收氧化气体。 反应塔包括反应表面。 在反应塔底部附近有一个气体的第一个入口，在第一个入口上方的反应塔中有一个碱性化合物的第二个入口。 该装置允许气体和碱性化合物的逆流流动以便能够洗涤气体。 在塔底有一个洗涤气体出口和液体出口。

    Fixation of nitrogen
    3.
    发明授权
    Fixation of nitrogen 失效
    固氮

    公开(公告)号：US4271137A

    公开(公告)日：1981-06-02

    申请号：US76377

    申请日：1979-09-17

    申请人： Paul Harteck

    发明人： Paul Harteck

    IPC分类号： C01B21/48 ,  C01F11/38

    CPC分类号： C01F11/38 ,  C01B21/48

    摘要： A process for the fixation of nitrogen comprising, combining a gaseous nitrogen and oxygen at a total temperature of about 100 atmospheres with a solid oxide which can produce a nitrate, in the presence of a catalyst for the acceleration of a reaction between nitrogen and oxygen to produce nitrogen oxides, initially heating the combination of a temperature of between 600.degree. C. to 800.degree. C. and below the dissociation pressure of the nitrate to start an exothermic reaction for producing nitrogen oxides from the nitrogen and oxygen and for producing nitrate from the solid oxide and to establish an equilibrium between the nitrogen, oxygen, nitrogen oxides, solid oxide and nitrate. The reacting combination in equilibrium is then cooled and either the nitrate or the nitrogen oxides are removed from the reaction as products.

    摘要翻译： 一种用于固氮的方法，包括：在催化剂存在下，在氮和氧之间加速反应的催化剂中，将总气体约为100个大气压的气态氮和氧气与可产生硝酸盐的固体氧化物混合， 产生氮氧化物，最初加热温度在600℃至800℃之间并且低于硝酸盐的解离压力的组合，以开始放热反应，以从氮和氧产生氮氧化物，并从 并建立氮，氧，氮氧化物，固体氧化物和硝酸盐之间的平衡。 然后将平衡中的反应组合冷却，并将硝酸盐或氮氧化物作为产物从反应中除去。

    METHOD FOR COMPLEX TREATMENT OF PHOSPHOGYPSUM
    5.
    发明申请
    METHOD FOR COMPLEX TREATMENT OF PHOSPHOGYPSUM 审中-公开

    公开(公告)号：US20180162740A1

    公开(公告)日：2018-06-14

    申请号：US15574902

    申请日：2016-04-25

    申请人： Wlodzimierz MERKA ,  PAGO SP. Z O.O.

    发明人： Wlodzimierz MERKA

    IPC分类号： C01F11/46 ,  C01B25/32 ,  C01C1/24 ,  C01F11/18 ,  C01F11/38 ,  C01B32/50 ,  C01B7/19 ,  C05D3/02 ,  C05C5/04 ,  C05D9/00

    CPC分类号： C01F11/468 ,  C01B7/191 ,  C01B25/324 ,  C01B32/50 ,  C01C1/24 ,  C01F11/18 ,  C01F11/38 ,  C01F11/46 ,  C05C5/04 ,  C05D3/02 ,  C05D9/00

    摘要： A method for complex treatment of phosphogypsum comprising crushing of phosphogypsum and its washing with a solution of sulphuric acid, concentration 2-15%, and stirring at 50-80° C., wherein the resultant mixture is separated into a liquid fraction and a sediment containing mostly calcium sulphate, which is characterized in that metals are precipitated from the liquid fraction, mainly lanthanides, phosphates and sulphates of metals soluble in diluted sulphuric acid, and the sediment containing mostly calcium sulphate is converted in the presence of ammonia liquor and carbon dioxide to ammonium sulphate and calcium carbonate, wherein filtered and dried sediment of calcium carbonate is dissolved in a 15-30% solution of nitric acid while stirring continuously, and then the resultant CO2 is recirculated and used in the conversion of the first phase of the sediment, and the resultant mixture is separated into a solution of calcium nitrate with dissolved metals and a sediment of fluorides and silicates with metal precipitate.

    Fixation of nitrogen using silicon oxide catalysts
    7.
    发明授权
    Fixation of nitrogen using silicon oxide catalysts 失效
    使用氧化硅催化剂固氮

    公开(公告)号：US4308246A

    公开(公告)日：1981-12-29

    申请号：US226592

    申请日：1981-01-21

    申请人： Paul Harteck

    发明人： Paul Harteck

    IPC分类号： C01B21/48 ,  C01F11/38 ,  C01G1/08

    CPC分类号： C01B21/48 ,  C01F11/38 ,  C01G1/08

    摘要： A process for the fixation of nitrogen comprising, combining a gaseous nitrogen and oxygen at a total pressure of above 100 atmospheres with a solid oxide which can produce a nitrate, in the presence of an oxide of silicon catalyst for the acceleration of a reaction between nitrogen and oxygen to produce nitrogen oxides, initially heating the combination to a temperature of between 600.degree. C. to 800.degree. C. and below the dissociation pressure of the nitrate to start an exothermic reaction for producing nitrogen oxides from the nitrogen and oxygen and for producing nitrate from the solid oxide and to establish an equilibrium between the nitrogen, oxygen, nitrogen oxides, solid oxide and nitrate. The reacting combination in equilibrium is then cooled and either the nitrate or the nitrogen oxides are removed from the reaction as products.

    摘要翻译： 一种用于固氮的方法，其包括：在硅催化剂氧化物存在下，将总气压为100多个大气压的气态氮和氧气与可产生硝酸盐的固体氧化物混合，以加速氮气之间的反应 和氧气以产生氮氧化物，最初将组合物加热至600℃至800℃的温度并低于硝酸盐的解离压力，以开始从氮气和氧气产生氮氧化物的放热反应并产生 硝酸盐，固体氧化物和氮，氧，氮氧化物，固体氧化物和硝酸盐之间的平衡。 然后将平衡中的反应组合冷却，并将硝酸盐或氮氧化物作为产物从反应中除去。