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    Process for treating H.sub.2 S containing streams
    2.
    发明授权
    Process for treating H.sub.2 S containing streams 失效
    用于处理含H2S的流的方法

    公开(公告)号：US6030597A

    公开(公告)日：2000-02-29

    申请号：US3610

    申请日：1998-01-07

    申请人： John S. Buchanan ,  Khushrav E. Nariman

    发明人： John S. Buchanan ,  Khushrav E. Nariman

    IPC分类号： B01D53/52 ,  B01J20/04 ,  B01J20/06 ,  B01J20/08 ,  B01J20/28 ,  C01B17/04

    CPC分类号： B01J20/28014 ,  B01D53/523 ,  B01J20/041 ,  B01J20/06 ,  B01J20/08 ,  B01J20/3433 ,  B01J20/3458 ,  C01B17/0404 ,  Y10S502/514

    摘要： This invention is directed to an improved process for conversion of H2S to sulfur, using MOST(Mobil Offgas Sulfur Treatment) catalyst or sorbent. The sorbent is typically a magnesium-aluminate spinet, with oxidation promoters such as ceria and vanadia. H.sub.2 S from the feed gas is used to regenerate sulfated sorbent, simultaneously producing elemental sulfur which is then condensed out. The improvement involves combusting part of the feed, converting some of the feed H.sub.2 S to SO.sub.2 prior to contacting the sulfated sorbent. Thus much of the stoichiometric oxygen required for conversion of H.sub.2 S to S is supplied in the form of SO.sub.2 by this pre-combustion step, instead of coming totally from the oxidized/sulfated solid sorbent. This can decrease the amount of sorbent required, as well as the frequency of regenerations, thus reducing process cost. The hot combustion gas also helps to heat the feed stream. One or more Claus reactors may optionally be added, to further increase sulfur recovery efficiency.

    摘要翻译： 本发明涉及使用MOST（Mobil Offgas硫处理）催化剂或吸附剂将H2S转化为硫的改进方法。 吸附剂通常是铝酸镁尖晶石，具有氧化促进剂，例如二氧化铈和氧钒。 来自进料气体的H 2 S用于再生硫酸化吸附剂，同时产生元素硫，然后将其冷凝。 改进之处在于使部分进料燃烧，然后在硫酸吸附剂接触之前将一些进料H2S转化为SO2。 因此，通过该预燃烧步骤以SO 2的形式提供将H 2 S转化为S所需的大部分化学计量的氧气，而不是完全来自氧化/硫酸化的固体吸附剂。 这可以减少所需的吸附剂的量以及再生的频率，从而降低工艺成本。 热燃烧气体还有助于加热进料流。 可以任选地加入一个或多个克劳斯反应器，以进一步提高硫回收效率。

    Process for the reduction of SO.sub.2 from wet lime/limestone tailgas in power plant desulfurization processes
    3.
    发明授权
    Process for the reduction of SO.sub.2 from wet lime/limestone tailgas in power plant desulfurization processes 失效
    在发电厂脱硫工艺中，从湿石灰/石灰石尾气中还原二氧化硫的工艺

    公开(公告)号：US6027704A

    公开(公告)日：2000-02-22

    申请号：US978249

    申请日：1997-11-25

    申请人： David L. Johnson ,  Khushrav E. Nariman ,  David L. Stern

    发明人： David L. Johnson ,  Khushrav E. Nariman ,  David L. Stern

    IPC分类号： B01D53/50 ,  B01D53/77 ,  B01D53/81 ,  B01D53/86 ,  C01B17/60

    CPC分类号： B01D53/501 ,  B01D53/8637 ,  C01B17/60 ,  Y02P20/584

    摘要： This invention describes a process for the scrubbing of sulfur oxides from the effluent of conventional wet lime/limestone SOx reduction processes in coal or oil-fired plants. The sulfur oxides are oxidatively sorbed onto solid sorbents such as magnesium aluminate spinel. Reduction with the appropriate reducing gases (such as hydrogen) regenerates the catalyst, also yielding a process stream concentrated in SOx. This concentrated SOx stream can then be refed to the front end of the coal or oil-fired plants, with the SOx thus produced ultimately being removed in the conventional wet scrubbing technology.

    摘要翻译： 本发明描述了一种从煤或燃油设备中的常规湿石灰/石灰石SOx还原过程的流出物中洗涤硫氧化物的方法。 硫氧化物被氧化吸附在固体吸附剂如铝酸镁尖晶石上。 用合适的还原气体（如氢气）还原催化剂，也产生浓缩在SOx中的工艺流。 然后可以将这种浓缩的SOx流改为煤或燃油设备的前端，由此生产的SOx最终在常规的湿式洗涤技术中被除去。

    Process for treating H.sub.2 S-lean streams, with recycle of SOx from burner
    4.
    发明授权
    Process for treating H.sub.2 S-lean streams, with recycle of SOx from burner 失效
    用于处理富含H2S的物流，从燃烧器回收SOx的方法

    公开(公告)号：US5958359A

    公开(公告)日：1999-09-28

    申请号：US992168

    申请日：1997-12-17

    申请人： John S. Buchanan ,  Khushrav E. Nariman

    发明人： John S. Buchanan ,  Khushrav E. Nariman

    IPC分类号： B01D53/52 ,  B01D53/75 ,  B01D53/81 ,  B01J20/06 ,  C01B17/04

    CPC分类号： B01J20/06 ,  B01D53/52 ,  B01D53/75 ,  B01D53/81 ,  C01B17/0404

    摘要： This invention is directed to an improved process for conversion of H.sub.2 S to sulfur, using MOST(Mobil Offgas Sulfur Treatment) catalyst or sorbent. The sorbent is typically a magnesium-aluminate spinel, with oxidation promoters such as ceria and vanadia. H.sub.2 S from the feed gas is used to regenerate sulfated sorbent, simultaneously producing elemental sulfur which is then condensed out. The improvement involves recycling a portion of the effluent from a downstream burner to mix with the feed to the sorbent. Thus some of the stoichiometric oxygen required for conversion of H.sub.2 S to S is supplied in the form of SO.sub.2 by this pre-combustion step, instead of coming totally from the oxidized/sulfated solid sorbent. This can decrease the amount of sorbent required, as well as the frequency of regenerations, thus reducing process cost. The hot recycle gas also helps to heat the feed stream.

    摘要翻译： 本发明涉及使用MOST（Mobil Offgas硫处理）催化剂或吸附剂将H2S转化为硫的改进方法。 吸附剂通常是铝酸镁尖晶石，具有氧化促进剂，例如二氧化铈和氧化钒。 来自进料气体的H 2 S用于再生硫酸化吸附剂，同时产生元素硫，然后将其冷凝。 该改进涉及将来自下游燃烧器的一部分流出物再循环到与吸附剂的进料混合。 因此，通过该预燃烧步骤以SO 2的形式提供将H 2 S转化为S所需的一些化学计量的氧，而不是完全来自氧化/硫酸化的固体吸附剂。 这可以减少所需的吸附剂的量以及再生的频率，从而降低工艺成本。 热回收气体还有助于加热进料流。

    Graded-bed system for improved separations
    6.
    发明授权
    Graded-bed system for improved separations 失效
    分级床系统，用于改进分离

    公开(公告)号：US5492684A

    公开(公告)日：1996-02-20

    申请号：US335027

    申请日：1994-11-07

    申请人： J. Scott Buchanan ,  Khushrav E. Nariman

    发明人： J. Scott Buchanan ,  Khushrav E. Nariman

    IPC分类号： B01D53/50

    CPC分类号： B01D53/508

    摘要： A method and system useful for the removal of contaminants such as sulfur oxides from waste gas streams using a graded-bed system is disclosed. The graded-bed system uses beds with solid sorbents of two or more particle sizes in separate sections of the bed. In one embodiment, the solid sorbents are arranged so that the larger sorbent particles are disposed in the entrance region of the graded-bed system. In operation, a waste gas stream is passed over and through the solid sorbents so that contaminants, such as sulfur oxides and/or nitrogen oxides are adsorbed. The sorbent bed is then contacted with a reducing gas to desorb the sulfur oxides.

    摘要翻译： 公开了一种用于使用分级床系统从废气流中除去污染物如硫氧化物的方法和系统。 分级床系统在床的单独部分中使用具有两个或更多个粒度的固体吸附剂的床。 在一个实施方案中，固体吸附剂被布置成使得较大的吸附剂颗粒设置在分级床系统的入口区域中。 在操作中，废气流通过并通过固体吸附剂，使得诸如硫氧化物和/或氮氧化物之类的污染物被吸附。 然后将吸附剂床与还原气体接触以解吸硫氧化物。

    Process scheme for SO.sub.x removal from flue gases
    7.
    发明授权
    Process scheme for SO.sub.x removal from flue gases 失效
    从烟道气中去除SOx的工艺方案

    公开(公告)号：US5741469A

    公开(公告)日：1998-04-21

    申请号：US727843

    申请日：1996-10-04

    申请人： Nazeer A. Bhore ,  David L. Johnson ,  Khushrav E. Nariman ,  David L. Stern

    发明人： Nazeer A. Bhore ,  David L. Johnson ,  Khushrav E. Nariman ,  David L. Stern

    IPC分类号： B01D53/50 ,  B01D53/73 ,  C01B17/04 ,  B01J8/00 ,  C01B7/00

    CPC分类号： C01B17/0473 ,  B01D53/508 ,  B01D53/73 ,  C01B17/04

    摘要： A dry, regenerable solid oxide process directed to convert SO.sub.x from the flue gas stream from a power plant, a coal or oil-fired plant or process heat furnace, or an FCC regenerator to elemental sulfur without using a Claus unit, a hydrogen plant, a regeneration gas separation system, or a hydrogenation section. This dry, regenerable solid oxide process is also effective on Claus plant tail-gas. This process uses solid oxides, such as, for example, magnesium aluminates or spinels to remove sulfur oxides from flue gas streams. The solid oxide is then regenerated by a reducing gas to release the sulfur compounds contained on the solid oxide to produce a gas stream comprising hydrogen sulfide, sulfur oxides and elemental sulfur. The elemental sulfur is then condensed and recovered as a product and the resulting gas stream may be recycled to be reprocessed over the solid oxide.

    摘要翻译： 一种干式可再生固体氧化物工艺，其特征是将SO x从来自发电厂，煤或燃油电厂或工艺加热炉或FCC再生器的烟道气转化为元素硫，而不使用克劳斯单元，氢厂， 再生气体分离系统或氢化部。 这种干式可再生固体氧化物工艺对克劳斯植物尾气也是有效的。 该方法使用固体氧化物，例如铝酸镁或尖晶石从烟道气流中除去硫氧化物。 然后通过还原气体再生固体氧化物以释放固体氧化物上所含的硫化合物，以产生包含硫化氢，硫氧化物和元素硫的气流。 然后将元素硫冷凝并回收，作为产物，所得气流可以再循环以在固体氧化物上再处理。