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. 15, 2014
Filed:
Jun. 19, 2007
Benoit Davidian, Saint Maur des Fosses, FR;
Pierre Bodelin, Vanves, FR;
Benoit Davidian, Saint Maur des Fosses, FR;
Pierre Bodelin, Vanves, FR;
Abstract
An air distillation unit comprises an air distillation column () suitable for producing a nominal flow of gaseous nitrogen, the top of said column being connected to a liquid nitrogen source (), and operates by carrying out the following steps: a flow of compressed, cooled and purified air is sent to an exchanger () and then to the column, a flow of gaseous nitrogen is withdrawn from the column, the level of liquid at the bottom of the column is controlled; and injection liquid (), sent from the source to the column, is no longer sent if the required production reduces to at most the nominal production. Application to the separation of air by cryogenic distillation.