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.

Date of Patent:
Mar. 26, 2019

Filed:

Dec. 22, 2016
Applicant:

Rtj Technologies Inc., Montreal, CA;

Inventors:

Charles Tremblay, Montreal, CA;

Alain Roy, Montreal, CA;

Simon Jasmin, Montreal, CA;

Assignee:

RTJ TECHNOLOGIES INC., Montreal, Quebec, CA;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 3/02 (2006.01); C10L 3/10 (2006.01);
U.S. Cl.
CPC ...
F25J 3/0209 (2013.01); F25J 3/0233 (2013.01); F25J 3/0257 (2013.01); C10L 3/102 (2013.01); C10L 3/106 (2013.01); F25J 2200/02 (2013.01); F25J 2200/72 (2013.01); F25J 2200/74 (2013.01); F25J 2205/04 (2013.01); F25J 2205/50 (2013.01); F25J 2210/02 (2013.01); F25J 2210/04 (2013.01); F25J 2210/42 (2013.01); F25J 2210/66 (2013.01); F25J 2215/04 (2013.01); F25J 2215/60 (2013.01); F25J 2220/02 (2013.01); F25J 2220/60 (2013.01); F25J 2220/66 (2013.01); F25J 2220/68 (2013.01); F25J 2230/30 (2013.01); F25J 2230/60 (2013.01); F25J 2240/44 (2013.01); F25J 2270/18 (2013.01); F25J 2270/66 (2013.01); F25J 2290/12 (2013.01); F25J 2290/34 (2013.01); F25J 2290/62 (2013.01);
Abstract

The method is carried out for continuously producing a liquefied methane gas (LMG) from a pressurized mixed methane gas feed stream. It is particularly well adapted for use in relatively small LMG distributed production plant, for instance those ranging from 400 to 15,000 MT per year, and/or when the mixed methane gas feed stream has a wide range of nitrogen-content proportions, including nitrogen being substantially absent. The proposed concept can also be very useful in the design of medium-scale and/or large-size plants, including ones where the nitrogen content always remains above a certain threshold. The methods and arrangements proposed herein can mitigate losses of methane gas when venting nitrogen, for instance in the atmosphere.


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