Recovery of alkali values from sodium bicarbonate-containing ore with ammonia
US4283372A · kind A · utility
19Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1980 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Jan 29, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C41/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for recovering alkali value from sodium bicarbonate-containing ore by utilizing an aqueous solvent containing ammonia. The aqueous ammonia solvent is contacted with the ore to solubilize the sodium bicarbonate-containing ore. The alkali values in the resulting solution are crystallized, preferably as sodium carbonate monohydrate or as sodium sesquicarbonate, which may be processed to recover soda ash. Aqueous ammonia solvent is preferably regenerated from the mother liquor remaining after recovery of the solids, the ammonia solvent then being employed in a cyclic method to recover additional alkali values from the ore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.