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:
Jan. 08, 1991
Filed:
Feb. 02, 1990
Jeffrey A Hopkins, Whitehall, PA (US);
Roger M McGuinness, Macungie, PA (US);
Rakesh Agrawal, Allentown, PA (US);
Steven L Feldman, Allentown, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A process for making high purity argon is disclosed in which crude argon containing less than about 0.8 mol % oxygen is recovered from air in a cryogenic distillation system, the crude argon is purified by removing oxygen in a getter system, and other impurities are removed by cryogenic distillation to yield a high purity argon product. The crude argon purification system is heat integrated with the main cryogenic air separation system. High purity argon can be produced at argon recoveries greater than 90% by utilizing structured packing in at least a portion of the argon sidearm column.