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. 26, 1978
Filed:
Apr. 07, 1975
Masakazu Komori, Totsuka-ku, Yokohama-shi, Kanagawa, JP;
Kazuyuki Shiga, Minamishinagawa, Shinagawa-ku, Tokyo, JP;
Hajime Kitazato, Sasanodai, Asahi-ku, Yokohama-shi, Kanagawa, JP;
Hiroaki Okajima, Jujonakahara, Kita-ku, Tokyo, JP;
Yoshiharu Tanaka, Kouza-gun, Kanagawa, JP;
Shoiti Nojima, Sakurajosui, Setagaya-ku, Tokyo, JP;
Masashige Fukamachi, Shimonagaya, Konan-ku, Yokohama-shi, Kanagawa, JP;
Akinori Kurima, Hodogaya-ku, Yokohama-shi, Kanagawa, JP;
Other;
Abstract
Spent activated-carbon is fluidized and directly heated at a temperature of 100.degree. to 700.degree. C in the first zone with an off gas from the second zone to remove volatiles from the spent carbon. The carbon so treated is then indirectly heated in the second zone at a temperature of 500.degree. to 1000.degree. C in the substantial absence of oxygen with a combustion gas while being fluidized with steam or a steam-containing inert gas to activate the carbon. The process ensures effective utilization of heat energy and substantially reduces the loss of carbon.