Functionalized resins for lithium capture
AssigneeBoard of Regents, The University of Texas System
InventorsJonathan L. SESSLER, Zachariah PAGE, Sheng-Yin HUANG, Hu WANG
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Abstract
The present disclosure relates to functionalized supports for the separation of metal ions from a recycling solution such as from a battery. In particular, these resins may be used in capture methods that make use of solvent polarity such as switching from an aprotic solvent to a protic solvent to facilitate separation of the desired metals. These methods may be particularly useful for the separation of lithium, cobalt, nickel, and lanthanum from composition from batteries.
Claims81
A method of obtaining a purified metal or a metal salt of interest from a composition comprising at least a metal or metal salt to be purified, the method comprising:
- (A) contacting the composition with a metal selective chelating agent in the presence of an aprotic solvent to form a metalated metal selective chelating agent;
- and
- (B) exposing the metalated metal selective chelating agent to a protic solvent to form a purified metal sample.
A composition comprising:
- (A) a support;
- and
- (B) a chelating unit of the formula:
- wherein:
- R1, R1′, R1″, R2, R2′, R2″, R5, R5′, R5″, R6, R6′, and R6″ are each independently cycloalkyl(C≤12), aryl(C≤12), heteroaryl(C≤12), heterocycloalkyl(C≤12), or a substituted version of any of these groups;
- R3, R3′, R3″, R7, R7′, and R7″ are each independently hydrogen or R3 and R4, R3′ and R4′, R3″ and R4″, R7 and R8, R7′ and R8′, or R7″ and R8″ are joined together to form a 3-8 membered cycloalkane ring or a 3-8 membered heterocycloalkane ring;
- R4, R4′, R8, and R8′ are hydrogen, a connection to a resin or polymer, or taken together as defined above;
- and
- X1 and X2 are each independently O or N.
Dependencies are inferred from the claim text.