Industrial waste salt resourceful treatment method and device
US11332379B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2021 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Jul 26, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2305/026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An industrial waste salt resourceful treatment method comprises the following steps: the industrial waste salt is sequentially subject to dissolving, chemical pre-purification, deep purification, organic matter concentration reduction, adsorption and oxidation decolorization and multi-effect evaporative crystallization to respectively obtain sodium sulfate, sodium chloride and sodium nitrate crystals; the crystallization temperature of sodium sulfate is in a range of 75° C. to 85° C.; the crystallization temperature of sodium chloride is in a range of 60 to 70° C.; and the crystallization temperature of sodium nitrate is in a range of 45° C. to 55° C. An industrial waste salt resourceful treatment device is further provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.