B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/24
B01D 53/04 (2006.01) B01D 53/047 (2006.01)
Patent
CA 2040348
An improved process for the pre-purification of air prior to introduction into a cryogenic air separation unit is described. Water vapor and carbon dioxide are substantially removed from air by a pressure swing adsorption (PSA) process utilizing an adsorbent which has an initial layer of activated alumina which comprises from about 70% to 100% by volume of the bed with the remaining layer, if present, being a suitable zeolite. The particles of adsorbent, particularly the zeolite, have a particle size not greater than two mm. The PSA cycle is particularly suited to the use of such finely particulate adsorbent.
Description d'un procédé amélioré de prépurification de l'air avant son introduction dans une unité de séparation cryogénique de l'air. La vapeur d'eau et le dioxyde de carbone sont dans une large mesure éliminés de l'air grâce à un procédé d'adsorption modulée en pression (AMP) faisant appel à un adsorbant possédant une première couche d'alumine activée contenant approximativement de 70 à 100 % en volume du lit, tandis que la couche restante, s'il y en a une, est composée de la zéolite appropriée. Les particules d'adsorbant, surtout la zéolite, ont une dimension qui ne dépasse pas 2 mm. Le cycle de l'AMP convient particulièrement à l'utilisation d'un adsorbant constitué de particules si fines.
Gowling Lafleur Henderson Llp
The Boc Group Inc.
LandOfFree
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