US 12,453,939 B2
Separation of gases from air
Guillaume Ortiz, Lacq (FR); and Quitterie Persillon, Lacq (FR)
Assigned to Arkema France, Puteaux (FR)
Appl. No. 17/776,854
Filed by Arkema France, Colombes (FR)
PCT Filed Nov. 23, 2020, PCT No. PCT/FR2020/052148
§ 371(c)(1), (2) Date May 13, 2022,
PCT Pub. No. WO2021/105598, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 1913287 (FR), filed on Nov. 27, 2019.
Prior Publication US 2022/0387923 A1, Dec. 8, 2022
Int. Cl. B01D 53/22 (2006.01); B01D 53/04 (2006.01); B01D 53/047 (2006.01)
CPC B01D 53/0407 (2013.01) [B01D 53/0476 (2013.01); B01D 2253/1085 (2013.01); B01D 2253/304 (2013.01); B01D 2256/12 (2013.01); B01D 2257/102 (2013.01); B01D 2259/4146 (2013.01); B01D 2259/4533 (2013.01); B01D 2259/4541 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for non-cryogenic separation of industrial gases by (V) PSA and for industrial preparation of oxygen by (V) PSA, comprising contacting the industrial gases with a zeolitic adsorbent material, where the zeolitic adsorbent material:
is based on faujasite (FAU) zeolite crystals, the Si/Al mole ratio of which is between 1.00 and 1.13, limits inclusive, where the crystals are chosen from NaLSX type crystals and NaMSX type crystals,
has a content of non-zeolite phase (NZP) such that 0<NZP≤10%, by weight relative to the total weight of the zeolitic adsorbent material,
is present as adsorbent layers, and
has a bulk density of between 0.55 g·cm−3 and 0.70 g·cm−3,
wherein sodium content of the zeolitic adsorbent material is greater than 95%, limits inclusive, the sodium content being expressed as a percentage of exchangeable sites, and
wherein the zeolitic adsorbent material has a measured nitrogen (N2) mass adsorption capacity under 4 bar (0.4 MPa) at 25° C. of greater than 23 Ncm3·g−1.