公开(公告)号：US06395665B2

公开(公告)日：2002-05-28

申请号：US09263709

申请日：1999-03-05

申请人： Shigeru Nojima ,  Kozo Iida ,  Yoshiaki Obayashi

发明人： Shigeru Nojima ,  Kozo Iida ,  Yoshiaki Obayashi

IPC分类号： B01J3864

CPC分类号： B01J38/60 ,  B01D53/8625 ,  B01D53/96 ,  B01J23/92 ,  B01J38/62 ,  B01J38/64 ,  B01J38/66 ,  B01J38/68 ,  Y02C20/30

摘要： This invention provides a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with an aqueous alkaline solution to remove the substances deposited thereon, and subjecting the catalyst to an activation treatment with an aqueous acid solution; a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with a cleaning fluid comprising an aqueous solution containing sulfuric acid or ammonia at a concentration of 0.05 to 20% by weight and maintained at a temperature of 10 to 90°C.; and a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power under the above-described conditions, and impregnating the denitration catalyst with a catalytically active component so as to support it on the catalyst.

摘要翻译： 本发明提供了一种用于再生脱硝催化剂的方法，其包括用碱性水溶液清洗具有降低的脱硝功率的脱硝催化剂以除去其上沉积的物质，并用酸水溶液进行活化处理; 一种用于再生脱硝催化剂的方法，其包括用包含浓度为0.05至20重量％的硫酸或氨的水溶液的清洁流体清洗具有降低的脱硝功率的脱硝催化剂，并保持在10至 90°C。 以及脱硝催化剂的再生方法，该方法包括在上述条件下清洗具有降低的脱硝功率的脱硝催化剂，并用催化活性组分浸渍脱硝催化剂以便将其支持在催化剂上。

公开(公告)号：US06342462B1

公开(公告)日：2002-01-29

申请号：US09274005

申请日：1999-03-22

申请人： Santi Kulprathipanja

发明人： Santi Kulprathipanja

IPC分类号： B01J3864

CPC分类号： B01J38/64 ,  B01D53/02 ,  B01J20/20 ,  B01J20/3204 ,  B01J20/3208 ,  B01J20/3236 ,  B01J20/3433 ,  B01J20/3475 ,  B01J38/54

摘要： A novel process for the regeneration of a solid adsorbent which is at least partially spent and has a reactive metal (e.g. silver) dispersed thereon is disclosed. The regeneration consists of a step whereby accumulated metal-containing reaction products formed during adsorptive service are removed by stripping the spent or partially spent adsorbent with a suitable stripping solution such as sodium thiosulfate. After detrimental metal-containing deposits are stripped, the adsorbent is then subjected to a reactivation step in which the regenerated adsorbent is contacted with a solution containing a reactive metal compound (e.g. silver nitrate). Reactivating the adsorbent therefore adds an incremental amount of the reactive metal onto the adsorbent. Regeneration of the adsorbent according to the two-step method of the present invention thus effectively prolongs its useful life. The present invention is particularly applicable to adsorbents used in processes involving the adsorption of iodine-containing compounds from contaminated feed streams.

摘要翻译： 公开了一种用于再生固体吸附剂的新方法，其至少部分地被消耗并且具有分散在其上的反应性金属（例如银）。 再生包括通过用合适的汽提溶液例如硫代硫酸钠汽提废弃或部分用过的吸附剂来除去吸附剂中形成的含金属反应产物的步骤。 在除去有害的含金属沉积物之后，然后对吸附剂进行再活化步骤，其中再生的吸附剂与含有反应性金属化合物（例如硝酸银）的溶液接触。 因此，重新激活吸附剂会增加一定量的反应性金属到吸附剂上。 因此，根据本发明的两步法的吸附剂的再生有效地延长了其使用寿命。 本发明特别适用于涉及从受污染的进料流吸附含碘化合物的方法中使用的吸附剂。