Alkali metal and/or alkali earth metal extraction method
US10113214B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 4, 2013 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | Jul 4, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B26/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides an alkali metal and/or alkali earth metal extraction method that has excellent extraction efficiency and allows repeated use of an aqueous solution that extracts an alkali metal and/or alkali earth metal from a solid. The alkali metal and/or alkali earth metal extraction method is a method for extracting an alkali metal and/or alkali earth metal from a solid containing the alkali metal and/or alkali earth metal, the method including an elution step in which the solid is added to a neutral amino acid-containing aqueous solution or an amino acid-containing mixed aqueous solution produced by mixing a pH adjusting agent with an aqueous solution containing at least one of a neutral amino acid, an acidic amino acid and a basic amino acid so as to elute the alkali metal and/or alkali earth metal in the neutral amino acid-containing aqueous solution or the amino acid-containing mixed aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.