US 11,656,207 B2
Material and its method for rapid eluting in an ionic rare earth ore leaching site
Guocai Zhu, Beijing (CN); and Husheng Hu, Beijing (CN)
Assigned to TSINGHUA UNIVERSITY, Beijing (CN)
Filed by Tsinghua University, Beijing (CN)
Filed on Nov. 17, 2020, as Appl. No. 17/99,972.
Claims priority of application No. 202010031624.5 (CN), filed on Jan. 13, 2020.
Prior Publication US 2021/0215646 A1, Jul. 15, 2021
Int. Cl. G01N 30/02 (2006.01); C22B 1/00 (2006.01); C22B 3/04 (2006.01); C22B 59/00 (2006.01)
CPC G01N 30/02 (2013.01) [C22B 1/00 (2013.01); C22B 3/04 (2013.01); C22B 59/00 (2013.01); G01N 2030/027 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for eluting an ionic rare earth ore leaching site, comprising:
weighing ferrous sulfate (FeSO4.7H2O) and dissolve the weighted ferrous sulfate in water to prepare a solution with a concentration in a range from 0.5 g/L to 5 g/L, and using one of sulfuric acid and alkali to adjust a PH value of the solution to be in a range from 4 to 6 to obtain an eluant; and
taking a soil sample from the ionic rare earth ore leaching site in Jiangxi to make an eluting column, and using the eluent to elute the eluting column according to a ratio of the eluant (ml)/the soil sample (g) being in a range from 1 to 5 to obtain an eluted sample; taking the eluted sample at determined intervals to analyze contents of ammonia nitrogen and rare earths thereof; after the eluting is completed, re-taking the eluted sample to analyze contents of ammonia nitrogen and rare earths in the soil sample in the eluting column.