Crystallization of sodium carbonate decahydrate from liquors supersaturated in sodium bicarbonate
US7018594B2 · kind B2 · utility
3Cited by
7References
20Claims
0Family size
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Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Aug 25, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D7/35
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for recovering sodium carbonate decahydrate crystals from solutions and mother liquors supersaturated in sodium bicarbonate concentration. Feed liquors containing higher levels of sodium bicarbonate than traditionally fed to a sodium carbonate decahydrate crystallizer are used to create a mother liquor within a sodium carbonate decahydrate crystallizer that is supersaturated with respect to sodium bicarbonate. Substantially pure sodium carbonate decahydrate crystals may be precipitated from the supersaturated mother liquor without substantially precipitation of sodium bicarbonate containing crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.