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:
May. 10, 2016
Filed:
Jul. 25, 2013
Conocophillips Company, Houston, TX (US);
Wesley Roy Qualls, Katy, TX (US);
Qi Ma, Katy, TX (US);
Megan Victoria Evans, Houston, TX (US);
Karl Lee Herzog, Houston, TX (US);
Jame Yao, Sugar Land, TX (US);
Mohan Chahal, Houston, TX (US);
Matt Calvin Gentry, Katy, TX (US);
Attilio Jose Praderio, Humble, TX (US);
Marc Thomas Bellomy, Cypress, TX (US);
Satish Gandhi, Sugar Land, TX (US);
Mike Wilkes, Katy, TX (US);
Will James, Richmond, TX (US);
ConocoPhillips Company, Houston, TX (US);
Abstract
Methods and systems for removing nitrogen during liquefaction of natural are provided. Methods of removing nitrogen include warming a predominantly methane stream in a methane cold box to provide a warmed predominantly methane stream; conducting at least a portion of the warmed predominantly methane stream from the methane cold box to a nitrogen removal unit comprising at least a first nitrogen removal column and a last nitrogen removal column, wherein the first nitrogen removal column is located upstream of the last nitrogen removal column; passing the warmed predominantly methane stream through the last nitrogen removal column to provide a refluxed warmed predominantly methane stream; and routing at least a portion of the refluxed warmed predominantly methane stream to the last nitrogen removal column.