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8 条记录 (耗时 0.022 秒)

    Process for selective removal of cyclic urea from hindered amine gas treating solution
    1.
    发明授权
    Process for selective removal of cyclic urea from hindered amine gas treating solution 失效
    从受阻胺气体处理溶液中选择性除去环状脲的方法

    公开(公告)号：US4292286A

    公开(公告)日：1981-09-29

    申请号：US102611

    申请日：1979-12-11

    申请人： Geoffrey R. Say ,  James R. Hays, Sr. ,  Jagannathan N. Iyengar

    发明人： Geoffrey R. Say ,  James R. Hays, Sr. ,  Jagannathan N. Iyengar

    IPC分类号： B01D53/14 ,  B01D53/34

    CPC分类号： B01D53/1412 ,  B01D53/1425 ,  B01D53/1456

    摘要： A cyclic urea reaction product forms as a by-product of a hindered amine acid gas scrubbing process and results in an ultimate buildup of the material in the circulating amine scrubbing solution. The buildup of this material has a deleterious effect on acid gas removal rates and accordingly, results in inefficient acid gas removal. In the process of the present invention, the cyclic urea degradation product is removed from the circulating solution by employing a selective precipitation of the cyclic urea followed by filtration. The selective precipitation is carried out by cooling the circulating solution to a particular temperature level such that the cyclic urea comes out of solution while the other components remain in solution.

    摘要翻译： 环状尿素反应产物形成为受阻胺酸气洗涤工艺的副产物，并导致该循环胺洗涤溶液中物质的最终累积。 这种材料的积累对酸性气体去除速率具有有害的影响，因此导致无效的酸性气体去除。 在本发明的方法中，通过使用环状尿素的选择性沉淀，然后过滤，从循环溶液中除去环状脲分解产物。 通过将循环溶液冷却至特定的温度水平进行选择性沉淀，使得环状脲从溶液中排出，而其它组分保留在溶液中。

    Process for converting cyclic urea to corresponding diamine in a gas treating system
    2.
    发明授权
    Process for converting cyclic urea to corresponding diamine in a gas treating system 失效
    在气体处理系统中将环脲转化为相应的二胺的方法

    公开(公告)号：US4282194A

    公开(公告)日：1981-08-04

    申请号：US122589

    申请日：1980-02-19

    申请人： Geoffrey R. Say ,  James R. Hays, Sr. ,  Jagannathan N. Iyengar ,  Barbara A. Hacker

    发明人： Geoffrey R. Say ,  James R. Hays, Sr. ,  Jagannathan N. Iyengar ,  Barbara A. Hacker

    IPC分类号： B01D53/14 ,  B01D53/52 ,  B01D53/34

    CPC分类号： B01D53/1425 ,  B01D53/1456 ,  B01D53/1493 ,  B01D53/526 ,  Y02C10/06

    摘要： Acidic gases such as carbon dioxide are removed from a normally gaseous mixture including the acidic component by contacting the gaseous mixture in an absorption zone with an acid absorbing scrubbing solution comprising a basic alkali metal compound and an activator for the compound, during which process at least a portion of the activator is converted to a cyclic urea. The solution is then transferred to the desorption zone to remove at least a portion of the absorbed acidic component. At least a portion of the partially desorbed scrubbing solution containing the cyclic urea is transferred from the desorption zone to a thermal conversion zone maintained at an elevated temperature wherein at least a portion of the cyclic urea is converted back to the activator. A portion of the scrubbing solution from the thermal conversion zone, relatively rich in the acidic component is vaporized and returned to the desorption zone, and another portion, relatively lean in the acidic component, is returned from the thermal conversion zone to the absorption zone.

    摘要翻译： 通过使吸收区中的气体混合物与包含碱性碱金属化合物和化合物的活化剂的吸酸洗涤溶液接触，将酸性气体如二氧化碳从包括酸性组分的常规气态混合物中除去，在该过程中至少 活化剂的一部分转化为环状脲。 然后将溶液转移到解吸区以除去至少一部分吸收的酸性组分。 含有环状尿素的部分解吸附的洗涤溶液的至少一部分从解吸区转移到保持在高温下的热转化区，其中至少一部分环脲转化回活化剂。 相对富含酸性组分的来自热转化区的洗涤溶液的一部分被蒸发并返回到解吸区，并且酸性组分中相对贫的另一部分从热转化区返回到吸收区。

    Process for selective removal of cyclic urea from hindered amine gas treating solution
    3.
    发明授权
    Process for selective removal of cyclic urea from hindered amine gas treating solution 失效
    从受阻胺气体处理溶液中选择性除去环状脲的方法

    公开(公告)号：US4180548A

    公开(公告)日：1979-12-25

    申请号：US972500

    申请日：1978-12-22

    申请人： Geoffrey R. Say ,  James R. Hays, Sr. ,  Jagannathan N. Iyengar

    发明人： Geoffrey R. Say ,  James R. Hays, Sr. ,  Jagannathan N. Iyengar

    IPC分类号： C07D245/02 ,  B01D53/14 ,  B01D53/40 ,  B01D53/64 ,  B01D53/77 ,  C07D233/34 ,  C07D239/10 ,  C07D243/04 ,  B01D53/34

    CPC分类号： B01D53/1412 ,  B01D53/1425 ,  B01D53/1456

    摘要： A cyclic urea reaction product forms as a by-product of a hindered amine acid gas scrubbing process and results in an ultimate buildup of the material in the circulating amine scrubbing solution. The buildup of this material has a deleterious effect on acid gas removal rates and accordingly, results in inefficient acid gas removal. In the process of the present invention, the cyclic urea degradation product is removed from the circulating solution by employing a selective precipitation of the cyclic urea followed by filtration. The selective precipitation is carried out by cooling the circulating solution to a particular temperature level such that the cyclic urea comes out of solution while the other components remain in solution.

    摘要翻译： 环状尿素反应产物形成为受阻胺酸气洗涤工艺的副产物，并导致该循环胺洗涤溶液中物质的最终累积。 这种材料的积累对酸性气体去除速率具有有害的影响，因此导致无效的酸性气体去除。 在本发明的方法中，通过使用环状尿素的选择性沉淀，然后过滤，从循环溶液中除去环状脲分解产物。 通过将循环溶液冷却至特定的温度水平进行选择性沉淀，使得环状脲从溶液中排出，而其它组分保留在溶液中。

    Desulfurizing tailgas from sulfur recovery unit
    4.
    发明授权
    Desulfurizing tailgas from sulfur recovery unit 失效
    硫回收装置脱硫

    公开(公告)号：US5514351A

    公开(公告)日：1996-05-07

    申请号：US186934

    申请日：1994-01-27

    申请人： John S. Buchanan ,  Jagannathan N. Iyengar ,  David L. Stern

    发明人： John S. Buchanan ,  Jagannathan N. Iyengar ,  David L. Stern

    IPC分类号： B01D53/04 ,  B01D53/48 ,  B01D53/50 ,  B01D53/52 ,  B01D53/86 ,  C01B17/04

    CPC分类号： B01D53/12 ,  B01D53/04 ,  B01D53/485 ,  B01D53/508 ,  B01D53/52 ,  B01D53/523 ,  B01D53/8609 ,  B01D53/8637 ,  C01B17/0408 ,  C01B17/0456 ,  C01B17/0473 ,  B01D2253/104 ,  B01D2257/30 ,  B01D2257/302 ,  Y02P20/129

    摘要： With sufficient oxygen but with no added fuel gas, recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream with heat exchange from heat generated in a thermal converter section of a sulfur recovery unit to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a solid adsorbent bed to extract the sulfur oxides and retain them as sulfur compounds, thus forming a sulfur oxide depleted gas stream. The adsorbent bed is then contacted with a reducing gas stream to reduce the retained sulfur compounds to hydrogen sulfide and/or sulfur dioxide and thereby form a hydrogen sulfide and/or sulfur dioxide bearing stream. Sulfur is recovered from the hydrogen sulfide and/or sulfur dioxide bearing stream, and the sulfur oxide depleted gas stream maybe sent to an incinerator or vented through a stack.

    摘要翻译： 用足够的氧气，但没有添加燃料气体，从硫回收装置的热转化器部分产生的热量通过热交换来氧化气流，从含有硫化氢的气流中回收硫，以将气流中的硫化氢转化为 硫氧化物，从而形成富含硫氧化物的气流。 富含硫氧化物的气流与固体吸附剂床接触以提取硫氧化物并将其保留为硫化合物，从而形成贫硫氧化物气流。 然后使吸附剂床与还原气流接触，将留下的硫化合物还原为硫化氢和/或二氧化硫，从而形成含硫化氢和/或二氧化硫的物流。 硫从硫化氢和/或含二氧化硫的物流中回收，硫氧化物贫化气体流可以送到焚化炉或通过堆垛排放。

    Recovering sulfur from ammonia acid gas stream
    5.
    发明授权
    Recovering sulfur from ammonia acid gas stream 失效
    从氨酸气流中回收硫

    公开(公告)号：US5292492A

    公开(公告)日：1994-03-08

    申请号：US877936

    申请日：1992-05-04

    申请人： J. Scott Buchanan ,  Jagannathan N. Iyengar

    发明人： J. Scott Buchanan ,  Jagannathan N. Iyengar

    IPC分类号： B01D53/50 ,  B01D53/52 ,  C01B17/04 ,  C01B17/16

    CPC分类号： C01B17/0491 ,  B01D53/508 ,  B01D53/523 ,  C01B17/0408 ,  C01B17/0456 ,  C01B17/0478

    摘要： Method and system for recovering sulfur from an ammonia acid gas stream containing hydrogen sulfide comprising the steps of combusting the ammonia acid gas stream with air or oxygen to convert the ammonia and the hydrogen sulfide therein to N.sub.2 and SO.sub.x, respectively, and thus form a nitrogen and sulfur oxide enriched gas stream. The nitrogen and sulfur oxide enriched gas stream is contacted with a solid absorbent bed to extract the sulfur oxides and retain them as sulfur compounds, thus forming a nitrogen bearing stream. The absorbent bed is then contacted with a hydrogen and/or hydrocarbon bearing stream to reduce the retained sulfur compounds to hydrogen sulfide and/or sulfur dioxide and thereby form a hydrogen sulfide and/or sulfur dioxide bearing stream. Sulfur is recovered from the hydrogen sulfide and/or sulfur dioxide bearing stream. The nitrogen bearing stream is sent to an incinerator or vented through a stack.

    摘要翻译： 从含有硫化氢的氨酸气流中回收硫的方法和系统，包括以下步骤：将氨酸气流与空气或氧气一起燃烧以将氨和硫化氢分别转化为N 2和SO x，从而形成氮 和富含硫氧化物的气流。 富含氮氧化物和氧化硫的气流与固体吸收剂床接触以提取硫氧化物并将其保留为硫化合物，从而形成含氮气流。 然后将吸收剂床与氢气和/或含烃流体接触以将保留的硫化合物还原成硫化氢和/或二氧化硫，从而形成含硫化氢和/或二氧化硫的物流。 从硫化氢和/或二氧化硫气流中回收硫。 氮气流被送到焚烧炉或通过堆垛排放。