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    Argon recovery from partial oxidation based ammonia plant purge gases
    1.
    发明授权
    Argon recovery from partial oxidation based ammonia plant purge gases 失效
    从部分氧化为基础的氨装置吹扫气体回收氩气

    公开(公告)号：US5100447A

    公开(公告)日：1992-03-31

    申请号：US575256

    申请日：1990-08-30

    申请人： Ramachandran Krishnamurthy ,  Mark J. Andrecovich ,  Donald L. MacLean ,  Karen J. Wright

    发明人： Ramachandran Krishnamurthy ,  Mark J. Andrecovich ,  Donald L. MacLean ,  Karen J. Wright

    IPC分类号： B01D53/04 ,  C01B23/00 ,  F25J3/02 ,  F25J3/04

    CPC分类号： F25J3/0219 ,  C01C1/0476 ,  F25J3/0223 ,  F25J3/0233 ,  F25J3/0257 ,  F25J3/0276 ,  F25J3/0285 ,  F25J3/08 ,  F25J2200/02 ,  F25J2200/04 ,  F25J2205/40 ,  F25J2205/60 ,  F25J2205/82 ,  F25J2210/20 ,  F25J2215/04 ,  F25J2270/12 ,  F25J2270/14 ,  F25J2270/42 ,  Y02P20/129 ,  Y02P20/52 ,  Y10S62/924

    摘要： The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, methane, hydrogen, and nitrogen which comprises the steps of (a) passing the feed mixture through a pressure swing adsorption system to remove carbon monoxide, methane and part of the nitrogen thereby producing a fraction containing an increased amount of argon, and (b) passing the argon fraction to a cryogenic fractional distillation system to remove hydrogen and the remaining nitrogen in the fraction as a distillate product and to produce a pure argon product. In a second embodiment, the invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, methane, hydrogen, and nitrogen which comprises the steps of (a) passing the feed mixture through a first cryogenic fractional distillation system to remove carbon monoxide, hydrogen, and nitrogen as distillate products and to produce a fraction containing an increased amount of argon, and (b) passing the argon fraction to a second cryogenic fractional distillation system to remove methane and to produce pure argon as a distillate product.

    摘要翻译： 本发明涉及从包含氩气，一氧化碳，甲烷，氢气和氮气的进料混合物中回收氩的方法，其包括以下步骤：（a）使进料混合物通过变压吸附系统以除去一氧化碳， 甲烷和部分氮气，从而产生含有增加量的氩的馏分，和（b）将氩馏分通入低温分馏系统以除去作为馏出物产物的馏分中的氢和剩余的氮，并产生纯的 氩产品。 在第二个实施方案中，本发明涉及从包含氩气，一氧化碳，甲烷，氢气和氮气的进料混合物中回收氩气的方法，该方法包括以下步骤：（a）使进料混合物通过第一低温分馏系统 去除一氧化碳，氢气和氮气作为馏出物产物，并产生含有增加量的氩的馏分，和（b）将氩馏分通入第二低温分馏系统以除去甲烷并产生纯氩作为馏出物 产品。

    Process for the production of nitriles
    5.
    发明授权
    Process for the production of nitriles 失效
    腈类生产工艺

    公开(公告)号：US4943650A

    公开(公告)日：1990-07-24

    申请号：US304055

    申请日：1989-01-30

    申请人： Ramakrishnan Ramachandran ,  Mark J. Andrecovich ,  Donald L. MacLean ,  Donald P. Satchell, Jr.

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

    IPC分类号： B01J23/18 ,  B01J19/00 ,  B01J23/28 ,  B01J23/825 ,  B01J23/835 ,  C07B61/00 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08 ,  C07D301/08 ,  C07D303/04

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

    摘要： An improved process is provided for the production of nitriles and oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, and ammonia where a nitrile is desired, in the presence of a suitable catalyst. An alkane, e.g. propane, is converted to an alkene in a catalytic dehydrogenator. The product stream is introduced into an ammoxidation 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 to form a recycle stream containing unreacted alkane and alkene as well as a minor amount of oxygen, typically 1-2 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 remove the oxygen therefrom and then recycled to the dehydrogenator. Flammability of the quench tower gaseous effluent and the waste stream from the absorber/stripper is minimized by assuring that the nonflammability index (NFI) thereof is within certain limits. The desired NFI is related to the total hydrocarbon content of the stream and may be achieved, if required, by the addition thereto of a gaseous flame suppresor. 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 utilized to remove excess hydrogen from the dehydrogenator effluent. The dehydrogenator may be a multistage dehydrogenator.

    Process for the production of oxides
    9.
    发明授权
    Process for the production of oxides 失效
    氧化物生产工艺

    公开(公告)号：US5043461A

    公开(公告)日：1991-08-27

    申请号：US518377

    申请日：1990-05-03

    申请人： Ramakrishnan Ramachandran ,  Mark J. Andrecovich ,  Donald L. MacLean ,  Donald P. Satchell, Jr.

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

    IPC分类号： B01J19/00 ,  C07C253/26 ,  C07C253/34 ,  C07D301/08

    CPC分类号： B01J19/002 ,  C07D301/08 ,  Y02P20/582

    摘要： An improved process for the production of oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, in the presence of a suitable catalyst. An alkane, e.g. propane, is converted to an alkene in a catalytic dehydrogenator. The product stream is introduced into an oxidation reactor. 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 to form a recycle stream containing unreacted alkane and alkene as well as a minor amount of oxygen, typically 1-2 percent by volume, and a waste stream comprising the remainder of the quench tower gaseous phase. The recycle stream enters a selective oxidation unit wherein oxygen is removed, and the product recycled to the dehydrogenator. Flammability of the quench tower gaseous effluent and the waste stream from the absorber/stripper is minimized by assuring that the nonflammability index (NFI) thereof is within certain limits. Desired NFI, related to the total hydrocarbon content, may be achieved by the addition thereto of a gaseous flame suppressor. The gaseous flame suppressor, removed with the absorber/stripper unit waste stream, may advantageously be combusted to provide energy. A PSA unit may remove excess hydrogen from the dehydrogenator effluent. The dehydrogenator may be a multistage dehydrogenator.

    摘要翻译： 在合适的催化剂存在下，通过与氧气，空气或相对于空气富含氧的气体（优选后者）反应从烃生产氧化物的改进方法。 烷烃，例如 丙烷转化为催化脱氢剂中的烯烃。 将产物流引入氧化反应器中。 在其中形成的产物在常规骤冷塔中回收。 来自骤冷塔的气态流出物的压力升高，并将其引入吸收器/汽提器单元以形成含有未反应的烷烃和烯烃以及少量氧气（通常为1-2体积％）的再循环料流，以及 包括骤冷塔气相的剩余部分的废物流。 再循环流进入选择性氧化单元，其中除去氧，产物再循环到脱氢器中。 通过确保其不可燃性指数（NFI）在一定限度内，骤冷塔气态流出物和来自吸收器/汽提塔的废物流的易燃性被最小化。 与总碳氢化合物含量有关的所需NFI可以通过添加气态阻燃剂来实现。 用吸收器/汽提器单元废物流除去的气体火焰抑制器可以有利地被燃烧以提供能量。 PSA单元可以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。