Title:
A separation recovery method of metallic elements
Document Type and Number:
Japanese Patent JP5955085
Kind Code:
B2
Abstract:
A separation and recovery method that enables titanium and tungsten to be separated and recovered from a used DeNOx catalyst in high yield. Specifically, a method of separating and recovering metal elements that includes a first heating step of heating a DeNOx catalyst containing titanium, tungsten, vanadium and iron in a chlorine atmosphere, thereby removing the vanadium and the iron from the DeNOx catalyst, and a second heating step, performed after the first heating step, of heating the DeNOx catalyst in a chlorine atmosphere while the catalyst is exposed to a gas of a hydrocarbon compound (excluding CH4) or an oxygen-containing carbon compound, thereby volatilizing the tungsten and the titanium from the DeNOx catalyst, and recovering the tungsten and the titanium from the DeNOx catalyst.
Inventors:
Masashi Kiyosawa
Katsumi Noji
Takashi Kobayashi
Kozo Iida
Katsuyasu Sugawara
Yuki Mochizuki
Katsumi Noji
Takashi Kobayashi
Kozo Iida
Katsuyasu Sugawara
Yuki Mochizuki
Application Number:
JP2012103786A
Publication Date:
July 20, 2016
Filing Date:
April 27, 2012
Export Citation:
Assignee:
Mitsubishi Hitachi Power Systems Co., Ltd.
Akita University
Akita University
International Classes:
C22B34/36; B09B3/00; C01G23/02; C01G41/00; C22B1/08; C22B7/00; C22B34/12; C22B34/22
Domestic Patent References:
| JP2008222499A | ||||
| JP9500821A | ||||
| JP54099704A |
Attorney, Agent or Firm:
Noriharu Fujita
Kunio Ueda
Kunio Ueda