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:
Sep. 21, 2010
Filed:
Feb. 27, 2006
Norihiro Nakashima, Kawasaki, JP;
Masayoshi Kuwbara, Kawasaki, JP;
Manabu Higo, Kawasaki, JP;
Hiroyuki Kobayashi, Tokyo, JP;
Norihiro Nakashima, Kawasaki, JP;
Masayoshi Kuwbara, Kawasaki, JP;
Manabu Higo, Kawasaki, JP;
Hiroyuki Kobayashi, Tokyo, JP;
Tonen General Sekiyu K.K., Tokyo, JP;
Showa Shell Sekiyu K.K., Tokyo, JP;
Research Association of Refinery Integration for Group Operation, Tokyo, JP;
Abstract
A method which controls sedimentation occurring at a heat exchanger for cooling hydrodesulfurization/hydrocracking residue containing asphaltenes at a high content and thereby prevents fouling of the heat exchanger is disclosed. A method for preventing fouling of a heat exchanger for cooling hydrodesulfurization/hydrocracking residue, which injects flux oil into hydrodesulfurization/hydrocracking residue containing asphaltenes at 1% by mass or more, wherein the flux oil is at least one species of residue selected from the group consisting of crude vacuum distillation residue and fluidized catalytic cracking residue, and injected into the hydrodesulfurization/hydrocracking residue to control its actual sediment content at 0.2% by mass or less, determined in accordance with IP-375 is also disclosed.