Title:
METHOD AND APPARATUS FOR MANUFACTURING VANADIUM COMPOUND AND METHOD AND APPARATUS FOR MANUFACTURING ELECTROLYTIC SOLUTION FOR REDOX FLOW BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/106164
Kind Code:
A1
Abstract:
This method for manufacturing a vanadium compound includes an alkali extraction step (step 12) for adding alkali and water, or an alkali solution to raw material ash containing vanadium to obtain an alkali leachate, a solid-liquid separation step (step 13) for solid-liquid separating insoluble matter from the alkali leachate to obtain a leaching filtrate including vanadium, an evaporative concentration step (step 14) for evaporatively concentrating the leaching filtrate to obtain a concentrated liquid, and a crystallization/solid-liquid separation step (step 15) for cooling the concentrated liquid to induce crystallization and recovering a precipitate containing a vanadium compound. The pH of the alkaline leachate is greater than 9 and less than 13.
More Like This:
Inventors:
NISHINO TAKASHI
AKAGI DAICHI
KITAGAWA YUTA
AKAGI DAICHI
KITAGAWA YUTA
Application Number:
PCT/JP2022/043936
Publication Date:
June 15, 2023
Filing Date:
November 29, 2022
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
C01G31/00; C01G31/02; C22B3/12; C22B3/22; C22B7/02; C22B34/22; H01M8/18
Domestic Patent References:
| WO2017208471A1 | 2017-12-07 | |||
| WO2017069223A1 | 2017-04-27 | |||
| WO2019111698A1 | 2019-06-13 |
Foreign References:
| JP2020200227A | 2020-12-17 | |||
| JP2021031344A | 2021-03-01 | |||
| JP2021031345A | 2021-03-01 | |||
| JP2020125531A | 2020-08-20 |
Attorney, Agent or Firm:
ARCO PATENT & TRADEMARK ATTORNEYS (JP)
Download PDF: