Process for the separation of insoluble materials in the production of soda ash
US4202667A · kind A · utility
20Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1978 |
| Grant date | May 13, 1980 |
| Priority date | — |
| Expiry date | Aug 16, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D7/126
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved process for the production of soda ash from trona including the steps of sizing the trona, heating the trona to eliminate water and carbon dioxide therefrom, dissolving the trona in an aqueous medium to obtain a solution thereof, removing insoluble solid materials from the solution, crystallizing sodium carbonate monohydrate from the solution, and heating the crystallized sodium carbonate monohydrate to produce soda ash. The improvement of the invention comprises the step of removing insoluble solid materials from the solution of trona by classifying the insoluble solid materials in a plurality of hydroclones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.