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. 26, 1988
Filed:
Nov. 03, 1986
Robert G Gates, Mendham, NJ (US);
The BOC Group, Inc., Montvale, NJ (US);
Abstract
The present invention relates to the liquefaction of a permanent gas comprising nitrogen. The temperature of the permanent gas stream at a pressure in the range of 75 to 90 atmospheres is reduced to below its initial temperature. Providing at least part of the necessary refrigeration, a single nitrogen working fluid cycle is performed in which the nitrogen working fluid is compressed to a pressure in the range of 75 to 90 atmospheres, cooled to a temperature in the range of 170 to 200 K., work expanded to a temperature in the range of 107 to 120 K., and warmed by heat exchange countercurrently to the permanent gas stream, thereby providing refrigeration for the stream.