Method and apparatus for sodium slag recovery
US12392013B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 28, 2022 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Apr 13, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B7/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present disclosure relates to the field of the preparation of high purity sodium and the safe treatment of sodium calcium slag, and discloses a method and apparatus for sodium slag recovery by using gravity separation—controllable combustion—alkaline liquor leaching process for the preparation of high purity sodium and safe treatment of sodium calcium slag. The method comprises the following steps: (1) subjecting a liquid sodium slag to a gravity stratification to obtain pure metallic sodium and high calcium content sodium slag; (2) roasting the high calcium content sodium slag to obtain a roasting slag; and (3) leaching the roasting slag by using an alkaline liquor to obtain the sodium hydroxide solution and calcium hydroxide. The method and apparatus provided by the present disclosure have advantages including high efficiency separation of sodium and calcium, saving separation time, safe and controllable production process, and continuous production process, thereby providing a safe and efficient method for the preparation of high purity sodium and safe treatment of new sodium calcium slag generated by the method, allowing continuous production of high purity sodium and safe …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.