2022 Summer Undergraduate Research Program (SURP) Symposium
Location
ScholarSpace, Rod Library, University of Northern Iowa
Presentation Type
Open Access Poster Presentation
Document Type
poster
Keywords
Lithium mines and mining;
Abstract
An aminimide is a zwitterionic group containing a cationic nitrogen bonded to an anionic nitrogen. The goal of this project was to use the steric bulk and electronic properties of the aminimide to block other species in a brine solution such as potassium, and selectively pick up lithium. To test this, polymethacrylate beads which contain carboxyl groups were modified to the desired aminimide. Three different aminimide groups were tested, a trimethylaminimide, aminopyridiniumaminimide, and a triethylaminimide. The modified beads would be introduced to a solution containing lithium and the lithium concentration was measured before and after exposure to the beads using atomic absorption spectroscopy. Our realistic brine solution contained 10,000 ppm K, 200 ppm Li. Only the aminopyridiniumaminimide and the triethylaminimide exhibited selectivity. The aminopyridiniumaminimide took up 43.9 ppm Li, while the triethylaminimide took up 59.35 ppm Li.
Start Date
29-7-2022 11:00 AM
End Date
29-7-2022 1:30 PM
Event Host
Summer Undergraduate Research Program, University of Northern Iowa
Faculty Advisor
Martin Chin
Department
Department of Chemistry and Biochemistry
Copyright
©2022 Jacob Parker and Dr. Martin Chin
File Format
application/pdf
Recommended Citation
Parker, Jacob and Chin, Martin Ph.D., "Extracting Lithium Using the Steric Bulk of an Aminimide Functional Group" (2022). Summer Undergraduate Research Program (SURP) Symposium. 33.
https://scholarworks.uni.edu/surp/2022/all/33
Extracting Lithium Using the Steric Bulk of an Aminimide Functional Group
ScholarSpace, Rod Library, University of Northern Iowa
An aminimide is a zwitterionic group containing a cationic nitrogen bonded to an anionic nitrogen. The goal of this project was to use the steric bulk and electronic properties of the aminimide to block other species in a brine solution such as potassium, and selectively pick up lithium. To test this, polymethacrylate beads which contain carboxyl groups were modified to the desired aminimide. Three different aminimide groups were tested, a trimethylaminimide, aminopyridiniumaminimide, and a triethylaminimide. The modified beads would be introduced to a solution containing lithium and the lithium concentration was measured before and after exposure to the beads using atomic absorption spectroscopy. Our realistic brine solution contained 10,000 ppm K, 200 ppm Li. Only the aminopyridiniumaminimide and the triethylaminimide exhibited selectivity. The aminopyridiniumaminimide took up 43.9 ppm Li, while the triethylaminimide took up 59.35 ppm Li.
