Title:
METHOD FOR VANADIUM EXTRACTION AND PRECIPITATION BY USING VANADIUM-CONTAINING CARBONATED LEACH LIQUOR AND RECYCLING OF RESIDUAL LIQUID
Document Type and Number:
WIPO Patent Application WO/2023/087727
Kind Code:
A1
Abstract:
The present invention relates to the technical field of vanadium extraction metallurgy, and in particular to a method for vanadium extraction and precipitation by using a vanadium-containing carbonated leach liquor and recycling of residual liquid. The method comprises the following steps: a, enabling the vanadium-containing carbonated leach liquor to be in contact with an HCO3
- type anion exchange resin to obtain a vanadium-rich resin and an ion exchange residual liquid; b, returning the ion exchange residual liquid to a carbonation leaching process for use; c, enabling the vanadium-rich resin to be in contact with a desorbent to obtain a desorption liquid; d, adding ammonium bicarbonate into the desorption liquid for vanadium precipitation, and filtering to obtain ammonium metavanadate and vanadium precipitation residual liquid; and e, returning the vanadium precipitation residual liquid to the step c for use; wherein the desorbent is a solution containing ammonium bicarbonate and sodium bicarbonate. According to the method, the ion exchange resin is used as a carrier to achieve the exchange of vanadate radicals and bicarbonate radicals, so that the technological process of recycling vanadium from the carbonated leach liquor and circulating a medium is simplified; the whole technological process is performed at normal temperature, and energy consumption is reduced.
Inventors:
FU ZIBI (CN)
RAO YUZHONG (CN)
WU JINSHU (CN)
WU YOU (CN)
RAO YUZHONG (CN)
WU JINSHU (CN)
WU YOU (CN)
Application Number:
PCT/CN2022/102645
Publication Date:
May 25, 2023
Filing Date:
June 30, 2022
Export Citation:
Assignee:
PANGANG GROUP RES INSTITUTE CO LTD (CN)
International Classes:
C22B34/22; C22B3/12; C22B3/42; C22B7/00
Domestic Patent References:
| WO2021155441A1 | 2021-08-12 |
Foreign References:
| CN114293033A | 2022-04-08 | |||
| CN102337409A | 2012-02-01 | |||
| CN101649397A | 2010-02-17 | |||
| GB891521A | 1962-03-14 |
Other References:
FU, ZIBI: "Preparation of NH4VO3 by Carbonation Leaching of Calcium Vanadate", IRON STEEL VANADIUM TITANIUM, vol. 41, no. 6, 31 December 2020 (2020-12-31), XP009546110, ISSN: 1004-7638
Attorney, Agent or Firm:
LIAN & LIEN IP ATTORNEYS (CN)
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