Title:
SULFURIZING AGENT REMOVAL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/094308
Kind Code:
A1
Abstract:
Provided is a sulfurizing agent removal method that effectively removes dilute sulfurizing agents such as hydrogen sulfide from large volume solutions more efficiently than in the past. This sulfurizing agent removal method is a method for removing sulfurizing agent remaining in a post-sulfurization liquid obtained by adding a sulfurizing agent to a nickel-containing solution to sulfurize said nickel and separate the sulfide from the post-sulfurization liquid, wherein sulfur is generated and recovered by adding an iron compound to the post-sulfurization liquid and adding a sulfuric acid solution with a 0.05 N to 36 N concentration so that the pH of said post-sulfurization liquid becomes 0 to 3.0.
Inventors:
NAKAI OSAMU (JP)
NAGAI HIDEMASA (JP)
KOBAYASHI HIROSHI (JP)
HIGUCHI HIROTAKA (JP)
NAGAI HIDEMASA (JP)
KOBAYASHI HIROSHI (JP)
HIGUCHI HIROTAKA (JP)
Application Number:
PCT/JP2016/075974
Publication Date:
June 08, 2017
Filing Date:
September 05, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; B01J45/00; C02F1/72; C22B3/44
Foreign References:
| JP2004089915A | 2004-03-25 | |||
| JP2015127053A | 2015-07-09 | |||
| JP2014177391A | 2014-09-25 |
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
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