Synthesis of rare earth metal extractant
US8519184B2 · kind B2 · utility
0Cited by
0References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 5, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Jul 5, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A rare earth metal extractant in the form of a dialkyl diglycol amic acid is synthesized by reacting diglycolic anhydride with a dialkylamine in a synthesis medium. A molar ratio (B/A) of dialkylamine (B) to diglycolic anhydride (A) is at least 1.0. A non-polar or low-polar solvent in which the dialkyl diglycol amic acid is dissolvable is used as the synthesis medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.