US 11,807,544 B2
Selective recovery method of vanadium and cesium from waste sulfuric acid vanadium catalyst, and high-quality vanadium aqueous solution and cesium alum produced thereby
Ho Seok Jeon, Daejeon (KR); Shun Myung Shin, Daejeon (KR); Dong Ju Shin, Daejeon (KR); Dong Seok Lee, Daejeon (KR); and Sung Ho Joo, Daejeon (KR)
Assigned to KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES, Daejeon (KR)
Filed by Korea Institute Of Geoscience And Mineral Resources, Daejeon (KR)
Filed on Sep. 8, 2022, as Appl. No. 17/940,351.
Claims priority of application No. 10-2021-0145223 (KR), filed on Oct. 28, 2021.
Prior Publication US 2023/0138828 A1, May 4, 2023
Int. Cl. C01F 17/13 (2020.01); C01G 31/00 (2006.01); C01F 17/282 (2020.01); C22B 3/42 (2006.01); C22B 34/22 (2006.01); C22B 61/00 (2006.01)
CPC C01F 17/13 (2020.01) [C01F 17/282 (2020.01); C01G 31/003 (2013.01); C22B 3/42 (2013.01); C22B 34/225 (2013.01); C22B 61/00 (2013.01); C01P 2006/80 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A selective recovery method of vanadium and cesium from a waste sulfuric acid vanadium catalyst containing vanadium, cesium, iron, silica, aluminum, potassium, sodium, calcium and titanium by a hydrometallurgical method including water leaching, solid-liquid separation, vanadium solvent extraction, vanadium selective stripping and cesium alum production, the selective recovery method comprising the steps of:
(a-1) crushing and pulverizing a waste sulfuric acid vanadium catalyst;
(a-2) water-leaching the crushed and pulverized waste sulfuric acid vanadium catalyst and then solid-liquid separating to prepare a waste sulfuric acid vanadium water leachate containing vanadium and cesium in a cationic state;
(a-3) adding an organic solvent as a cation exchange extractant to the waste sulfuric acid vanadium water leachate containing vanadium and cesium in the cationic state to obtain a vanadium organic extract from which vanadium is solvent-extracted and a raffinate aqueous solution remaining after the solvent extraction of vanadium;
(a-4) preparing a vanadium aqueous solution by adding an alkali aqueous solution to the vanadium organic extract to selectively strip vanadium; and
(a-5) selectively recovering cesium from cesium alum precipitated by adding and reacting an aluminum compound to the raffinate aqueous solution obtained after the vanadium solvent extraction and cooling a mixture.