Soda ash production
US5043149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1990 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Aug 29, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Process for disposing of insoluble tailings that remain when solubilizing uncalcined or calcined trona in the process of producing soda ash, in which the tailings are slurried with water or waste solutions of sodium carbonate and/or sodium bicarbonate, pumping the slurry into a well connected to an underground mined-out cavity with sufficient pressure to prevent build-up of tailings from plugging the bottom of the well opening, dispersing and settling said tailings in the cavity, removing a liquor from said cavity whose concentration of sodium carbonate and/or sodium bicarbonate has been increased and recovering such enriched liquor for use in the manufacture of sodium-containing chemicals such as soda ash.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.