Title:
SYSTEM FOR EXTRACTING VANADIUM FROM LEACHING SOLUTION CONTAINING VANADIUM CHROMIUM SILICON AND FOR PREPARING VANADIUM PENTOXIDE AND PROCESSING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/129868
Kind Code:
A1
Abstract:
A system for extracting vanadium from a leaching solution containing vanadium chromium silicon and for preparing vanadium pentoxide, and a method therefor, the system comprising, in sequence: an impurity removal system, an extraction system, a reverse-extraction and vanadium precipitation system, a washing system and a calcining system. The method comprises the following steps: removing silicon in a leaching solution by using a silicon removal agent, extracting most of the vanadium to an organic phase by using centrifugal extraction, reverse-extracting the vanadium of a vanadium-rich organic phase by using a mixed solution containing a basic solution and an ammonium salt, and precipitating ammonium metavanadate to obtain an ammonium metavanadate solid, washing and drying, and then calcining at a certain temperature to obtain a low chromium, low silicon, low aluminum, and high-purity vanadium pentoxide product.
Inventors:
CAO HONGBIN (CN)
NING PENGGE (CN)
NING PENGGE (CN)
Application Number:
PCT/CN2017/090169
Publication Date:
July 19, 2018
Filing Date:
June 27, 2017
Export Citation:
Assignee:
INST PROCESS ENG CAS (CN)
International Classes:
C22B34/22; B01D11/04; C22B3/26; C22B3/44
Foreign References:
| CN103937998A | 2014-07-23 | |||
| CN102154550A | 2011-08-17 | |||
| JP2010242131A | 2010-10-28 | |||
| CN102764894A | 2012-11-07 | |||
| CN101121962A | 2008-02-13 | |||
| CN103540745A | 2014-01-29 | |||
| CN102849795A | 2013-01-02 | |||
| CN102923776A | 2013-02-13 | |||
| CN100497675C | 2009-06-10 | |||
| CN103937998A | 2014-07-23 |
Other References:
See also references of EP 3569720A4
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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