Carbon treatment of monohydrate crystallizer liquor
US4299799A · kind A · utility
13Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1980 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Apr 9, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D7/126
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Improved process for preparing sodium carbonate from crude trona without carbon column scaling by evaporating a portion of water from a clarified sodium carbonate solution to crystallize sodium carbonate crystals therefrom, separating the sodium carbonate crystals from the crystallizer liquor, passing only the crystallizer liquor which contains organic impurities through a carbon column to reduce the organic impurity concentration therein, and evaporating a portion of water from the carbon treated crystallizer liquor to crystallize additional sodium carbonate crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.