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公开(公告)号：US5258060A
公开(公告)日：1993-11-02
申请号：US950120
申请日：1992-09-23
IPC分类号： B01D53/04 , B01D53/047 , B01J20/02 , B01J20/18
CPC分类号： B01D53/0476 , B01D53/047 , B01D2253/106 , B01D2253/108 , B01D2253/30 , B01D2256/12 , B01D2257/102 , B01D2259/40066 , B01D53/0462 , Y10S95/902
摘要： The present invention is directed to adsorptive separation of nitrogen with active adsorbent phases with high N.sub.2 capacity and high heats of adsorption when diluted with inert material at levels ranging from 5% to 80%. The presence of diluent reduces the temperature swings in the adsorbent bed, which increases the utilizable effective N.sub.2 working capacity and decreases the relative amount of O.sub.2 left unrecovered on the active adsorbent phase. The net result is equal or better process performance allowing utilization of a lower amount of active adsorbent phase. Use of a diluent having a higher heat capacity than that of the active adsorbent phase increases these benefits, but dilution effects are beneficial even for diluents with heat capacities equal to or lower than that of the active adsorbent phase.
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公开(公告)号：US5266102A
公开(公告)日：1993-11-30
申请号：US950093
申请日：1992-09-23
IPC分类号： B01D53/04 , B01D53/047 , B01J20/02 , B01J20/18
CPC分类号： B01D53/0476 , B01J20/186 , B01D2253/104 , B01D2253/106 , B01D2253/108 , B01D2253/30 , B01D2256/12 , B01D2257/102
摘要： The invention is a process for selectively adsorbing nitrogen from a gas mixture which comprises contacting the gas mixture with an adsorbent that has a moderate nitrogen capacity and a high selectivity for nitrogen over the other components in the mixture. With respect to air separation, improved adsorbents have low O.sub.2 capacity with N.sub.2 capacity at roughly the same level as current adsorbents such as CaA. O.sub.2 VSA computer process simulations have shown the unexpected result that for materials with the same binary isothermal working selectivity, those with lower isothermal nitrogen working capacity are superior O.sub.2 VSA adsorbents, provided that they have a nitrogen working capacity of at least about 0.3 mmol/g.
摘要翻译： 本发明是一种从气体混合物中选择性吸附氮气的方法，该方法包括使气体混合物与混合物中其它组分具有适度氮气容量和高选择性氮气的吸附剂接触。 关于空气分离，改进的吸附剂具有低的O2容量，N2容量与目前的吸附剂如CaA大致相同。 O2 VSA计算机过程模拟已经显示了对于具有相同二元等温工作选择性的材料的意想不到的结果，具有较低等温氮工作能力的那些是优异的O 2 VSA吸附剂，只要它们具有至少约0.3mmol / g的氮气加工能力 。
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公开(公告)号：US5299749A
公开(公告)日：1994-04-05
申请号：US856602
申请日：1992-03-24
CPC分类号： B01D63/021 , B29C53/66
摘要： Bundles of hollow filament membranes suitable for use in fluid separation, such as in the separation of air into gases more concentrated in oxygen and nitrogen are made in a cylindrical form and annular cross-section with multiple filaments of each layer lying in generally parallel helical paths at a common angle to the axis of symmetry of the bundle. Continuous lengths of filaments are laid down on the core while same is rotated first in a "forward" sense and the filament lay-down point is traversed from a first end of the core to the second, and then in a "reverse" sense while the filament lay-down point is traversed from the second end to the first. Reversing of the direction of core rotation and filament end-to-end traversal is repeated with said reversing controlled in such a manner that the path of the filament returning from either end to the other is displaced incrementally from that of the filament portion laid down in the immediately preceding traversal. Lay-down of filament is repeated until a plurality of segments of filament all sharing the same helix angle and direction have formed a thin annular layer. The instant method can be precisely controlled to obtain bundles of desired packing density with consequent improved flow of fluid within the shell side of the bundle.
摘要翻译： 适合用于流体分离的中空丝膜的束，例如将空气分离成更浓缩在氧气和氮气中的气体，其制成圆柱形和环形横截面，每层的多根细丝具有大致平行的螺旋形路径 与束的对称轴成共同的角度。 将连续长度的长丝放置在芯上，同时首先以“向前”方向旋转并且细丝沉积点从芯的第一端穿过到第二端，然后以“反向”方式 灯丝铺设点从第二端穿过第一端。 重复旋转方向和细丝端对端横向的反转，其中所述反转被控制为使得从任一端返回到另一端的细丝的路径与从纤维中的细丝部分的纤维向 紧随其后的遍历。 重复细丝的放置，直到多个共享相同螺旋角和方向的细丝丝段形成薄的环状层。 可以精确地控制本方法以获得所需填充密度的束，从而改进了在束的壳侧内的流体流动。
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