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:
Apr. 11, 1995
Filed:
Oct. 12, 1993
Applicant:
Inventor:
Pascal Arriulou, Saint Maurice, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62 25 ; 62 38 ; 62 40 ;
Abstract
A column (4) for producing nitrogen comprises, below the air introduction point, a section (17, 18) enriched in oxygen and a sump reboiler (9) supplied by recycled high pressure nitrogen. The expanded liquid (at 19) for supplying the overhead condenser (8) is withdrawn at an intermediate level between the level of air introduction and the reboiler, and the liquid in the sump of the column, after vaporization, constitutes a minority product of the installation consisting essentially of oxygen.