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. 19, 1992
Filed:
Mar. 12, 1990
Elcor Corporation, Dallas, TX (US);
Abstract
A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbons from a liquefied natural gas (LNG) stream is disclosed. At least a portion of the LNG feed stream is directed in heat exchange relation with a compressed recycle portion of the fractionation tower overhead, with the warmed LNG stream thereafter supplied to the fractionation tower at a mid-column feed position. The recycle stream is cooled by the LNG stream sufficiently to substantially condense it, and the substantially condensed recycle stream is then supplied to the column at a top column feed position to serve as reflux for the tower. The pressure of the recycle stream and the quantities and temperatures of the feeds to the column are effective to maintain the column overhead temperature at a temperature whereby the major portion of said desired components is recovered in the bottom liquid product from the column.