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:
Aug. 10, 2010
Filed:
May. 15, 2006
Hiroaki Ohashi, Fukushima-Ken, JP;
Yasuyoshi Yamanobe, Fukushima-Ken, JP;
Hiroaki Ohashi, Fukushima-Ken, JP;
Yasuyoshi Yamanobe, Fukushima-Ken, JP;
Kureha Corporation, Tokyo, JP;
Abstract
A vertical multi-stage fluidized bed apparatus including a plurality of horizontal perforated partitioning plates disposed therein so as to partition the apparatus is provided, wherein an upper horizontal perforated partitioning plate is set to have a larger aperture rate than a lower horizontal perforated partitioning plate. From a lower part of the apparatus, feed carbon and fluidizing gas are continuously supplied so as to provide a gas superficial velocity in the fluidized bed which is 2-4 times a minimum fluidizing velocity of the feed carbon, thereby subjecting the feed carbon to fluidization with the fluidizing gas and activation with steam at 750-950° C. simultaneously to discharge activated carbon continuously from an upper part of the apparatus. As a result, activated carbon of even a high degree of activation is produced at a high yield comparable to that obtained in a batchwise operation.