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. 29, 1997
Filed:
Dec. 18, 1995
Applicant:
Inventors:
Philippe Fraysse, Fontenay sous Bois, FR;
Mike De L'Isle, Paris, FR;
Daniel Rousseau, Villiers sur Marne, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J / ;
U.S. Cl.
CPC ...
62646 ; 62650 ; 62651 ;
Abstract
In order to precool a flow of gas to be distilled, before a purification stage, it is sent into an exchanger (5) where it is cooled by heating a flow of refrigerant (13B). At least a part of this refrigerant has its pressure reduced before cooling the unpurified gas and may be a fraction of the gas to be distilled or a product of the distillation. It is preferably a cycle gas of the system. This arrangement makes it possible to obviate a refrigerating unit.