Recovering a caustic solution via calcium carbonate crystal aggregates
US8728428B1 · kind B1 · utility
7Cited by
2References
20Claims
0Family size
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Key dates
| Filing date | Mar 13, 2013 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Techniques for converting a portion of a carbonate to hydroxide include receiving an alkaline carbonate solution that includes between 0.1M (moles per liter of solution) to 4.0M hydroxide and between 0.1M to 4.1M carbonate; reacting, in a slaking process, quicklime (CaO) and a low carbonate content fluid to yield a slurry of primarily slaked lime (Ca(OH)2); and reacting the Ca(OH)2 slurry and the alkaline carbonate solution to grow calcium carbonate (CaCO3) crystal aggregates of 0.0005 mm3 to 5 mm3 in volume in a fluidized-bed reactive crystallizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.