The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2001
Filed:
Oct. 20, 1999
Cyrille Millet, Paris, FR;
Serge Moreau, Velizy-Villacoublay, FR;
Georges Kraus, Paris, FR;
Jean-Pierre Gabillard, Auffargis, FR;
Abstract
A process, particularly of the TSA type, for separating impurities of the nitrogen protoxide (N,O) and possibly carbon dioxide (CO,) or ethylene (C,H,) type which are contained in a gas stream, such as air. The impurities of nitrogen protoxide type are removed on a faujasite zeolite having a Si/Al ratio of 1 to 1.5 and containing from 0 to 35% of K,cations, between 1 and 99% of Na,cations and between 1 and 99% of Ca,cations, preferably at least 50% of Ca,cations. The separation is preferably carried out at a temperature of approximately −40° C. to +80° C., preferably at room temperature. Advantageously, the process is employed for prepurifying atmospheric air before cryogenic distillation of the air thus prepurified.