[12] Patent
[11] Patent No.:GC0009455  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/142208
Date of the Decision to Grant the Patent:24/Dec/2018

[21] Application No.:GC 2011-18338

[22] Filing Date:4/5/2011

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- Franklin D. Lomax،2- Richard S. Todd،3- Brian A. Zakrajsek

[73] Owner: Lummus Technology Inc., 1515 Broad Street, New Jersey 07003, Bloomfield, USA

[74] Agent: Suleiman I. Al-Ammar Law Office




Int. Cl.: B01D53/047; B01D53/053 (2006.01)

[56] Cited Documents:

-US 7604682 B2 (SEATON) 20 October 2009
-US 7674319 B2 (LOMAX, JR, ET AL.) 9 March 2010
-US 4298019 A (DARANSKY, ET AL.) 3 November 1981
-US 6099618 A (MONEREAU) 8 August 2000
Examiner: Rami Al-Ghamdi

[57] Abstract: A pressure swing adsorption (PSA) system using two or more valves for controlling the flow of gases entering or exiting a bed of adsorbents is disclosed, where the two or more valves are opened sequentially (i.e., in at least two actions separated by a delay in time). The sequential opening of the valves may increase the degree to which adsorbed species are purged from the bed, and also facilitates more rapid execution of certain time steps of the PSA cycle, thus increasing adsorbent productivity The sequential opening of the valves may also allow for verification of valve operation by measuring either the absolute value, the slope (derivative) or the rate of change of derivative of the pressure, either in the adsorbent bed, in the downstream manifold, or in a volume of gas held in a buffer vessel.
No. of claims: 51     No. of figures: 10


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