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:
Feb. 21, 2006
Filed:
Jan. 14, 2000
Hiroki Koyama, Toda, JP;
Yuichi Takahashi, Toda, JP;
Hiroki Koyama, Toda, JP;
Yuichi Takahashi, Toda, JP;
Japan Energy Corporation, Tokyo, JP;
Abstract
A unit for hydrorefining of hydrocarbon crude oil comprising sulfur-containing compounds comprises first catalyst layerand second catalyst layer, top spacefor separating vapor component and liquid component, bottom space, and valve traythat divides top spaceand bottom space. Hydrogen released from hydrogen nozzleplaced in the bottom space is passed through liquid component that has accumulated in the valve tray and stripping of liquid components is performed. Hydrogen released from hydrogen nozzleis again introduced, to second catalyst layeras a cocurrent with the stripped liquid component. By stripping, it is possible to reduce the sulfur content, the nitrogen content and reduce the aromatic content of the hydrocarbon crude oil when compared to the conventional method. Since the hydrorefining unit has a simple structure, the unit can be easily made by modifying existing units.