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:
Dec. 03, 2013
Filed:
Sep. 25, 2008
Yuichi Tanaka, Yokohama, JP;
Kazuhito Sato, Kitakatsushika-gun, JP;
Yuichi Tanaka, Yokohama, JP;
Kazuhito Sato, Kitakatsushika-gun, JP;
Japan Oil, Gas and Metals National Corporation, Kanagawa, JP;
Inpex Corporation, Tokyo, JP;
Nippon Oil Corporation, Tokyo, JP;
Japan Petroleum Exploration Co., Ltd., Tokyo, JP;
Cosmo Oil Co., Ltd., Tokyo, JP;
Nippon Steel Engineering Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a method of manufacturing a diesel fuel base stock improved in low-temperature flowability, including: fractionating in a first fractionator a synthetic oil obtained by Fisher-Tropsch synthesis into at least two fractions of a first middle fraction containing a component having a boiling range corresponding to diesel fuel oil, and a wax fraction containing a wax component heavier than the first middle fraction; hydroisomerizing the first middle fraction by bringing the first middle fraction into contact with a hydroisomerizing catalyst to produce a hydroisomerized middle fraction; hydrocracking the wax fraction by bringing the wax fraction into contact with a hydrocracking catalyst to produce a wax-decomposition component; and fractionating in a second fractionator a mixture of the produced hydroisomerized middle fraction and the produced wax-decomposition component, wherein rectification conditions in the first fractionator and/or rectification conditions in the second fractionator are adjusted to selectively reduce an n-paraffin having 19 or more carbon atoms in a heavy component contained in the diesel fuel base stock. Furthermore, disclosed is a diesel fuel base stock obtained by the manufacturing method.