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US 2022/0112577 A1Published application
Composition and method or recovering rare-earth elements
OwnerBradley STOCKMANNinventor
Life of this patent
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Abstract
Disclosed is a method for recycling metal-chelates by separating the metal or metal ion from the chelate by forming a metal salt or metal precipitate apart from the chelator. In various embodiments, gadolinium-chelates, which are used as MM contrast agent and which create vial hold-up material that is otherwise discarded, are acid or solvent treated to promote separation of the gadolinium from the chelate for downstream sale or further processing.
Claims20
A method of separating a metal from a chelate, the method comprising:
- a. pooling residual amounts of a solution from two or more containers to form a residual solution, wherein said residual solution comprises a (i) compound comprising a metal or metal ion and a chelate or polyol, (ii) an excipient, and (iii) water for injection;
- and
- b. extracting said metal or metal ion from said residual solution.
Dependencies are inferred from the claim text.