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    Separation of carbon dioxide and nitrogen from combustion exhaust gas with nitrogen and argon by-product recovery
    1.
    发明公开
    Separation of carbon dioxide and nitrogen from combustion exhaust gas with nitrogen and argon by-product recovery 失效
    二氧化碳和氮气的分离从燃烧废气与氮气和氩气的回收率作为副产物。

    公开(公告)号：EP0469781A2

    公开(公告)日：1992-02-05

    申请号：EP91306752.6

    申请日：1991-07-24

    申请人： THE BOC GROUP, INC.

    发明人： Krishnamurthy, Ramachandran ,  Andrecovich, Mark J.

    IPC分类号： C01B31/20 ,  F25J3/02 ,  C01B21/04 ,  C01B23/00

    CPC分类号： F25J3/08 ,  C01B3/025 ,  C01B21/0466 ,  C01B23/00 ,  C01B32/50 ,  C01B2210/0051 ,  C07C273/04 ,  F25J3/0257 ,  F25J3/0266 ,  F25J3/0285 ,  F25J2200/02 ,  F25J2200/76 ,  F25J2200/94 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2210/70 ,  F25J2215/42 ,  F25J2215/50 ,  F25J2220/44 ,  F25J2220/82 ,  F25J2240/02 ,  Y02C10/08 ,  Y02C10/12 ,  Y02P20/152 ,  Y10S62/924

    摘要： A method for producing carbon dioxide and nitrogen from combustion exhaust gas containing less than about 10% oxygen by weight comprises the steps of (a) treating the exhaust gas to remove particulate matter, (b) compressing the exhaust gas to a pressure in the range from about 25 psia to about 200 psia, (c) purifying the exhaust gas to remove trace contaminants, (d) separating the exhaust gas to produce a carbon dioxide rich fraction and a nitrogen rich fraction, (e) liquefying the carbon dioxide rich fraction and distilling off volatile contaminants to produce pure carbon dioxide, (f) purifying the nitrogen rich fraction to remove contaminants, and (g) cryogenically fractionally distilling the nitrogen rich fraction to produce pure nitrogen and preferably arc argon-enriched fraction which is then separated to produce argon. The combustion exhaust gas may be obtained from an ammonia plant reformer furnace and the nitrogen produced may be employed to synthesise ammonia. The carbon dioxide may be reacted with the ammonia to form urea.

    摘要翻译： 一种用于从含有按重量计小于约10％的氧气的燃烧废气生产二氧化碳和氮的方法包括：（a）处理该废气，除去颗粒状物质，（b）压缩的废气的压力的范围内的步骤 从大约25 psia至大约200 PSIA，（c）纯化所述废气，除去痕量污染物，（d）分离的废气，以产生富二氧化碳级分和一个富氮级分，（e）中液化富二氧化碳级分 蒸出挥发性污染物，以产生纯二氧化碳，（F）纯化富氮级分以除去污染物，和（g）低温分馏富氮级分以产生纯氮气和优选弧形的富氩级分的所有其然后分离 生产氩气。 燃烧废气可以从合成氨装置重整炉的获得，并且所产生的氮可以用于合成氨。 二氧化碳可以与氨反应以形成尿素。

    Process for the production of nitriles and oxides
    7.
    发明公开
    Process for the production of nitriles and oxides 失效
    Verfahren zur Herstellung von Nitrilen und Oxiden。

    公开(公告)号：EP0381369A1

    公开(公告)日：1990-08-08

    申请号：EP90300759.9

    申请日：1990-01-24

    申请人： THE BOC GROUP, INC.

    发明人： Ramachandran, Ramakrishnan ,  Andrecovich, Mark J. ,  Satchell, Donald P.Jr. ,  MacLean, Donald L.

    IPC分类号： C07C255/08 ,  C07C253/26 ,  C07C253/34 ,  C07D301/08

    CPC分类号： C07C253/34 ,  B01J19/002 ,  C07C253/24 ,  C07C253/26 ,  C07D301/08 ,  Y02P20/52 ,  Y02P20/582 ,  C07C255/08

    摘要： An alkane, e.g. propane, is converted to an alkene in a catalytic dehydrogenator. The resulting stream is introduced into an ammoxidation or oxidation reactor. The product formed therein is recovered in a conventional quench tower. The pressure of the gaseous effluent from the quench tower is raised and it is introduced into an absorber/stripper unit employing a liquid hydrocarbon to form a recycle stream containing unreacted alkane and alkene as well as a minor amount of oxygen, typically 1% percent by volume, and a waste stream comprising the remainder of the quench tower gaseous phase. The recycle stream is introduced into a selective oxidation unit to remover the oxygen therefrom and then recycled to the dehydrogenator. Flammability of the waste stream from the absorber/stripper is minimised by appropriately selecting the operating parameters of the process, and if necessary, by the addition thereto of a gaseous flame suppressor. The gaseous flame suppressor is removed with the absorber/stripper unit waste stream which may advantageously be combusted to provide energy for the process. A PSA unit may be utilised to remove excess hydrogen from the dehydrogenator effluent. The dehydrogenator may be a multistage dehydrogenator making it possible to do without the selective oxidation unit.

    摘要翻译： 烷烃，例如 丙烷转化为催化脱氢剂中的烯烃。 将所得流引入氨氧化反应器或氧化反应器中。 其中形成的产品在常规的骤冷塔中回收。 来自骤冷塔的气态流出物的压力升高，并将其引入采用液体烃的吸收器/汽提器单元中，以形成含有未反应的烷烃和烯烃以及少量氧的再循环流，通常为1％ 体积和包含骤冷塔气相的其余部分的废物流。 将再循环物流引入选择性氧化装置以从其中除去氧气，然后再循环至脱氢器。 通过适当地选择工艺的操作参数，并且如果需要，通过添加气态阻燃剂，使吸收器/汽提器的废物流的可燃性最小化。 气体火焰抑制器用吸收器/汽提器单元废物流除去，其可以有利地燃烧以为该方法提供能量。 可以使用PSA单元从脱氢器流出物中除去过量的氢。 脱氢剂可以是多级脱氢剂，使得可以在没有选择性氧化单元的情况下进行。