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:
Jul. 23, 1991
Filed:
Feb. 22, 1990
Dietrich Rottmann, Munich, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
An air separation system is provided comprising a double rectification column associated with a raw argon column, the latter being operated at a pressure substantially lower than the low-pressure part of the double column. A coupled turbine-compressor system is used: (a) to lower the pressure of the argon-containing gas entering a raw argon column from the low-pressure column; and (b) to compress evaporated liquid stemming from the high-pressure column which has been used to indirectly condense raw argon product at the top of the raw argon column. Also, a pump is employed to remove liquid from the bottom of the raw argon column and recycle it to the low-pressure column.