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. 30, 2015
Filed:
Jun. 26, 2008
Yasuyoshi Kato, Hiroshima, JP;
Yasuyoshi Kato, Hiroshima, JP;
Mitsubishi Hitachi Power Systems, Ltd., Yokohama, JP;
Abstract
[Problem] Provided is a method for regenerating a catalyst, the method decreasing the SOoxidation rate, which has been increased by Fe and V compounds, of a spent denitration catalyst to an extremely low level, and improves the oxidation activity of the catalyst for metal mercury by the regeneration treatment. [Solving Means] A method for regenerating a catalyst, including steps of immersing a spent denitration catalyst composed mainly of titanium oxide in (a) a mixed aqueous solution containing phosphate ions and oxo-acid ions of one or more elements selected from vanadium (V), molybdenum (Mo), and tungsten (W), (b) a heteropoly acid compound aqueous solution containing phosphorus and one or more elements selected from V, M, and W, or (c) a mixed aqueous solution containing a phosphate compound and a vanadyl compound, and then drying the catalyst.