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    METHOD OF CONCENTRATING NITROGEN ISOTOPE
    4.
    发明公开
    METHOD OF CONCENTRATING NITROGEN ISOTOPE 有权
    VERFAHREN ZUR KONZENTRIERUNG VON STICKSTOFFISOTOPEN

    公开(公告)号：EP2191885A1

    公开(公告)日：2010-06-02

    申请号：EP08832202.9

    申请日：2008-09-12

    申请人： Taiyo Nippon Sanso Corporation

    发明人： KIHARA, Hitoshi

    IPC分类号： B01D59/04 ,  F25J3/02

    CPC分类号： B01D59/04 ,  F25J3/08 ,  F25J2210/42 ,  F25J2215/42 ,  F25J2220/44 ,  F25J2220/90

    摘要： The present invention provides a method for concentrating nitrogen isotope comprising a step for obtaining a final product nitrogen, in which the stable nitrogen isotope, 15 N, has been concentrated, by low-temperature distillation of raw material nitrogen containing trace amounts of oxygen and argon with a plurality of distillation columns composed in a cascade arrangement, wherein together with discharging an argon-oxygen mixture from the bottom of the final column and extracting a 15 N-concentrated nitrogen fluid from a lower intermediate point of the final column, the flow rate of the argon-oxygen mixture discharged from the bottom of the final column is controlled based on the reading of a thermometer installed below the point where the final product 15 N-concentrated nitrogen is extracted, thereby enabling the final product nitrogen to be stably obtained.

    摘要翻译： 本发明提供一种浓缩氮同位素的方法，包括通过低温蒸馏含有痕量氧和氩的原料氮，获得最终产物氮的步骤，其中稳定的氮同位素15N已经被浓缩 具有以级联方式组成的多个蒸馏塔，其中从最后塔的底部排出氩 - 氧混合物并从最终塔的较低中间点提取15N浓缩氮流体，流速 基于读取安装在最终产品15N浓缩氮气的点以下的温度计的读数来控制从最终塔底部排出的氩 - 氧混合物，从而能够稳定地获得最终产品氮。

    Generation and purification of nitrogen.
    7.
    发明公开
    Generation and purification of nitrogen. 失效
    Erzeugung und Reinigung von Stickstoff。

    公开(公告)号：EP0407136A2

    公开(公告)日：1991-01-09

    申请号：EP90307247.8

    申请日：1990-07-03

    申请人： THE BOC GROUP, INC.

    发明人： Kamrath, David J.

    IPC分类号： F25J3/04 ,  F25J3/08

    CPC分类号： F25J3/04193 ,  F25J3/04242 ,  F25J3/04254 ,  F25J3/04296 ,  F25J3/044 ,  F25J3/08 ,  F25J2200/72 ,  F25J2205/02 ,  F25J2205/24 ,  F25J2205/60 ,  F25J2210/42 ,  F25J2215/44 ,  F25J2220/44 ,  F25J2290/62 ,  Y10S62/913

    摘要： In a nitrogen generation process in which a stream of air is compressed in compressor 11, is cooled and has water vapour and carbon dioxide removed therefrom in a reversing heat exchanger 16, and is separated in a rectification column 24, a gaseous nitrogen product stream 30 is produced. An air turbine 22 is operated to produce refrigeration for the process. The process is also used to purify merchant liquid nitrogen typically containing from 0.5 to 5 vpm of oxygen. A stream 51 of such merchant liquid nitrogen is introduced into a stage of the rectification column where the liquid nitrogen has a substantially matching composition. A stream 36 of purified liquid nitrogen is withdrawn from the top of the column 24. The purified liquid nitrogen can be produced at a rate in excess of that made possible by the turbine 22 without reducing the efficiency of gaseous nitrogen generation.

    摘要翻译： 在空气流在压缩机11中被压缩的氮气生成过程中，被冷却并在反向热交换器16中从其中除去水蒸汽和二氧化碳，并在精馏塔24中分离出气态氮产物流30 生产。 操作空气涡轮22以产生用于该过程的制冷。 该方法还用于纯化通常含有0.5至5vpm氧气的商用液氮。 将这种商用液氮的流51引入精馏塔的阶段，其中液氮具有基本匹配的组成。 纯化的液氮的流36从塔24的顶部排出。纯化的液氮可以以超过涡轮22可能的速率制造，而不会降低产生氮气的效率。

    Process and apparatus for producing liquid nitrogen
    8.
    发明公开
    Process and apparatus for producing liquid nitrogen 审中-公开
    Verfahren und Vorrichtung zur Erzeugung vonflüssigemStickstoff

    公开(公告)号：EP1544560A1

    公开(公告)日：2005-06-22

    申请号：EP04029742.6

    申请日：2004-12-15

    申请人： Linde BOC Process Plants LLC

    发明人： Musicus, Paul

    IPC分类号： F25J3/04 ,  F25J3/08

    CPC分类号： F25J3/04357 ,  F25J3/04224 ,  F25J3/04236 ,  F25J3/04393 ,  F25J3/08 ,  F25J2200/02 ,  F25J2200/76 ,  F25J2215/04 ,  F25J2215/44 ,  F25J2220/44 ,  F25J2270/06 ,  F25J2270/08 ,  F25J2270/42 ,  F25J2290/34

    摘要： The process and the apparatus serve for producing high-purity liquid nitrogen from an impure nitrogen feed stream. The process comprises the following steps:

    introducing the feed stream (1, 3) into a single distillation column (4),
    withdrawing a high-purity gaseous nitrogen stream (5) from the single distillation column (4),
    compressing at least a part of the high-purity gaseous nitrogen stream in a recycle compressor (8) of a nitrogen recycle system to produce a high-pressure recycle stream (10),
    work expanding (19, 36) at least a first portion (18, 35) of the high-pressure recycle stream (10) to produce a first low-pressure recycle stream (20, 37),
    recycling (7) at least a portion (23, 37) of the first low-pressure recycle stream to the recycle compressor (8),
    liquefying a second portion of the high-pressure recycle stream to produce a liquid recycle stream (28), and
    recovering at least a first portion (29) of the second low-pressure recycle stream (28) as liquid nitrogen product stream (31).

    摘要翻译： 该方法和设备用于从不纯的氮气进料流产生高纯度液氮。 该方法包括以下步骤：将进料流（1,3）引入单个蒸馏塔（4）中，从单一蒸馏塔（4）中取出高纯度气态氮气流（5），将至少一部分 在氮循环系统的再循环压缩机（8）中的高纯度气态氮气流，以产生高压循环流（10），工作膨胀（19,36）至少第一部分（18,35）为 所述高压循环流（10）以产生第一低压循环流（20,37），将所述第一低压循环流的至少一部分（23,37）再循环（7）到所述循环压缩机 液化高压再循环料流的第二部分以产生液体循环物流（28），并回收第二低压循环物流（28）的至少第一部分（29）作为液氮产物流 （31）。

    PROCESS AND APPARATUS FOR PRODUCING LIQUID CARBON DIOXIDE
    9.
    发明授权
    PROCESS AND APPARATUS FOR PRODUCING LIQUID CARBON DIOXIDE 失效
    方法和装置的液态二氧化碳生产

    公开(公告)号：EP0658245B1

    公开(公告)日：1997-10-01

    申请号：EP93920012.7

    申请日：1993-08-17

    申请人： ENERFEX, INC.

    发明人： CALLAHAN, Richard, A.

    IPC分类号： F25J3/00 ,  F25J3/02 ,  F01K17/00

    CPC分类号： F25J3/067 ,  B01D53/229 ,  C01B21/045 ,  C01B32/50 ,  C01B2210/0051 ,  F25J3/066 ,  F25J2205/40 ,  F25J2205/80 ,  F25J2210/04 ,  F25J2210/42 ,  F25J2210/70 ,  F25J2215/04 ,  F25J2220/44 ,  F25J2220/82 ,  F25J2230/30 ,  F25J2240/12 ,  F25J2245/90 ,  F25J2270/14 ,  Y02C10/12 ,  Y02E20/14 ,  Y02P20/129 ,  Y02P20/13 ,  Y02P20/152 ,  Y10S62/93

    摘要： A process for producing liquid carbon dioxide. A process stream which comprises carbon dioxide, balance substantially nitrogen and water, is cooled so that a minor amount of the water is condensed out. The process stream is compressed so that substantially all of the water but trace amounts is condensed out. Next, the process stream is cleaned to remove the trace amounts of water, any long-chain hydrocarbons present and any particulates present. The process stream is then separated into a nitrogen-rich gaseous stream and a carbon dioxide-rich gaseous stream. The carbon dioxide-rich gaseous stream is then compressed and the nitrogen-rich gaseous stream is expanded to produce an expanded nitrogen-rich gaseous stream. The energy of the expanding is used to compress the carbon dioxide-rich gaseous stream. The compressed carbon dioxide-rich gaseous stream is cooled to liquefy the carbon dioxide in the stream and reduce the temperature of the gaseous nitrogen in the stream. The liquefied carbon dioxide is withdrawn as product. The liquefying of the carbon dioxide-rich gaseous stream is by using the expanded nitrogen-rich gaseous stream. After the liquefying, the nitrogen-rich gaseous stream is used to perform at least part of the first cooling. In a preferred form, the process stream results from combusting a mixture of fuel and oxygen in a heat engine to drive an electrical generator with the product of the heat engine to produce electricity and also yielding the process stream. Apparatus for the production of liquid carbon dioxide which includes devices to perform each of the process steps.