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:
Jun. 23, 2009
Filed:
Oct. 25, 2004
Yasushi Ogawa, Yokkaichi, JP;
Shuhei Yada, Yokkaichi, JP;
Yoshiro Suzuki, Yokkaichi, JP;
Kenji Takasaki, Yokkaichi, JP;
Kimikatsu Jinno, Yokkaichi, JP;
Yasushi Ogawa, Yokkaichi, JP;
Shuhei Yada, Yokkaichi, JP;
Yoshiro Suzuki, Yokkaichi, JP;
Kenji Takasaki, Yokkaichi, JP;
Kimikatsu Jinno, Yokkaichi, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
The object of this invention is to provide a method of maintaining a multi-tubular reactor which can ensure the uniformity of states of reaction in the reaction tubes in the multi-tubular reactor. This invention is a method of maintaining a multi-tubular reactor in good condition by selecting a part of reaction tubes in a multi-tubular reactor at random, measuring a differential pressure occurring in each reaction tube when passing gas therethrough, separating any reaction tube showing an abnormal differential pressure as compared with the average of differential pressures in reaction tubes packed with an fresh catalyst of the same kind, giving adequate treatment to the separated reaction tube and returning it into the reactor with any other selected reaction tube falling within a normal range.