Process for the joint production of sodium carbonate and sodium bicarbonate
US8865096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2011 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D7/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the production of sodium carbonate and sodium bicarbonate out of trona, comprising crushing trona ore and dissolving it in a leaching tank containing a solution comprising sodium carbonate and sodium bicarbonate, and an additive selected from the group consisting of: phosphates, phospholipids, carboxylates, carboxilic acids, and combinations thereof, saturated in sodium bicarbonate, in order to produce solid particles suspended in a production solution comprising sodium carbonate, the solid particles containing insoluble impurities and at least 65% by weight of sodium bicarbonate. The solid particles are separated from the production solution containing sodium carbonate. At least part of the production solution containing sodium carbonate is taken out of the leaching tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.