Abstract: A method for purifying uranium includes forming primary uranyl peroxide precipitates (UO2O2.4H2O). Forming the primary uranyl peroxide precipitates includes obtaining impure uranium dissolved in an acidic solution, evaporating the acidic solution to increase uranium concentration and to form a concentrated solution, mixing a hydrogen peroxide (H2O2) solution with the concentrated solution in a first container, and forming uranyl peroxide precipitates in the first container. The method includes collecting the uranyl peroxide precipitates and washing and drying the uranyl peroxide precipitates. The method also includes converting the washed and dried uranyl peroxide precipitates into triuranium octoxide (U3O8).
Abstract: Provided is a catalyst for an oxidative dehydrogenation reaction that comprises: a porous support; a core portion supported on the porous support and containing a first zinc ferrite-based catalyst; and a shell portion supported on the core portion and containing a second zinc ferrite-based catalyst, in which the first zinc ferrite-based catalyst and the second zinc ferrite-based catalyst are different from each other.
Type:
Grant
Filed:
November 19, 2019
Date of Patent:
April 4, 2023
Assignee:
LG CHEM, LTD.
Inventors:
Ye Seul Hwang, Dong Hyun Ko, Joohyuck Lee, Myungji Suh
Abstract: According to an embodiment of the present invention, the method includes: (a) preparing a liquid cell containing a palladium precursor solution; (b) applying electron beams to the palladium precursor solution contained in the liquid cell; and (c) generating palladium hydride nanoparticles having the hcp crystal structure in the palladium precursor solution.
Type:
Grant
Filed:
September 29, 2020
Date of Patent:
March 21, 2023
Assignee:
Korea Institute of Science and Technology
Inventors:
Dong Won Chun, Sung Jong Yoo, Jaeyoung Hong, Hee-Young Park, Young-Su Lee, Jin-Yoo Suh, Jee-Hwan Bae, Min Kyung Cho