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. 26, 2008
Filed:
Dec. 06, 2002
Hiroki Koyama, Toda, JP;
Toru Saito, Toda, JP;
Yoshiki Iwata, Toda, JP;
Chikanori Nakaoka, Toda, JP;
Hiroki Koyama, Toda, JP;
Toru Saito, Toda, JP;
Yoshiki Iwata, Toda, JP;
Chikanori Nakaoka, Toda, JP;
Japan Energy Corporation, Tokyo, JP;
Abstract
A heavy oil is hydrorefined using a hydrorefining catalyst. A spent hydrorefining catalyst whose activity has decreased is heat treated (S) and pulverized to obtained a regenerated powder (S). This regenerated powder is fractionated according to its metal content (S), formed (S), dried (S), and calcined (S) to manufacture a regenerated catalyst whose volume of pores with a diameter of 50 to 2000 nm is at least 0.2 ml/g, and whose volume of pores with a diameter over 2000 nm is no more than 0.1 mL/g. Using this regenerated catalyst, a heavy oil containing at least 45 wt ppm vanadium and nickel as combined metal elements is hydrodemetalized, and the vanadium and nickel are recovered from the used regenerated catalyst (SS). Through hydrorefining, the metal components are recovered more efficiently, and the spent catalyst can be reused to manufacture a regenerated catalyst that exhibits high reaction, activity.