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. 21, 2009
Filed:
Jan. 26, 2005
Yoshiyuki Yamaguchi, Sapporo, JP;
Senichiro Kaku, Musashino, JP;
Kazutoshi Chaki, Ichihara, JP;
Japan Petroleum Exploration Co., Ltd., Tokyo, JP;
Abstract
A top temperature Tof a distillation toweris held below a liquefying temperature of a light fraction by returning a part of an exhaust gas W, which is cooled by a condenser, to the upper zone of the distillation tower. A bottom temperature Tis raised up to 300° C. at highest by returning a part of a liquid product P from a re-boiler 3 to a lower zone of the distillation tower. When a liquid hydrocarbon L comes in countercurrent contact with a stripping gas G inside the distillation towerwith the temperature profile that an inner temperature gradually falls down along an upward direction, mercury is efficiently transferred from the liquid L to a vapor phase without effusion of the light fraction in accompaniment with the exhaust gas W.