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:
Oct. 19, 1999
Filed:
Apr. 14, 1998
Dan Earl Midgett, II, Alburtis, PA (US);
David Miller Espie, Lansdale, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
The present invention relates to a thermally regenerable adsorptive process for the purification of a feed air, wherein the feed air is contacted with a solid adsorbent to remove at least water and carbon dioxide, wherein, periodically, the solid adsorbent is thermally regenerated by contacting the solid adsorbent with a regeneration gas stream which is essentially free of at least water and carbon dioxide, wherein the regeneration gas is a nitrogen-enriched stream removed from an elevated pressure air separation unit fed with the purified feed air, characterized in that the removed nitrogen-enriched stream is compressed in a multiple staged compressor and that the regeneration gas is a portion of the nitrogen-enriched stream which is removed from an interstage of the multiple stage compressor and then contacted with the solid adsorbent. The process is particularly suited for use with a solid adsorbent selected from the group consisting of 13X zeolite, silica gel, A zeolite, Y zeolite, mordenite, chabazite and mixtures thereof. Finally, the process of the present invention can comprise recycling the regeneration gas after contact with the solid adsorbent to one of the stages of the multiple stage compressor, preferably, from the stage from which it was removed.