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. 10, 2002
Filed:
Dec. 28, 1998
Applicant:
Inventors:
Masafumi Moriya, Katsushika-ku, JP;
Masatake Kawashima, Katsushika-ku, JP;
Takashi Ogawa, Katsushika-ku, JP;
Kazuhiro Terada, Katsushika-ku, JP;
Assignee:
Miyoshi Yushi Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 2/000 ; F23B 7/00 ;
U.S. Cl.
CPC ...
B01J 2/000 ; F23B 7/00 ;
Abstract
Formation of dioxins in flue gases is inhibited by contacting the flue gas with at least one of sodium phosphite, calcium phosphate, sodium hypophosphite, and calcium as reducing agents preferably at a temperature in the range of from 150° C. to 850° C. Hydrogen chlorides are also rendered harmless by the contact with the reducing agent. Also, metal ions contained in the fly ash of the flue gas are reduced to metals to reduce the occurrence of dissolution of the metals in subsequent treatment of the fly ash.