FIELD: inorganic compounds technology.
SUBSTANCE: process consists in preparation of melt CaO-Na2O by firing soda ash production waste containing CaO, CaCO3, and Na2CO3 at 1000-1100°C followed by leaching and evaporation of resulting sodium hydroxide. Calcium hydroxide formed in leaching stage is subjected to carbonization with carbon dioxide isolated in melt preparation stage. Process can be used in production of soaps, paints, cellulose, and the like.
EFFECT: increased concentration of sodium hydroxide in final product and consumed soda ash production waste.
4 cl, 1 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING LITHIUM HYDROXIDE OUT OF SPODUMENE CONCENTRATE | 2007 |
|
RU2347829C2 |
| HYDROCHEMICAL METHOD OF PROCESSING ALUMINOSILICATE MATERIAL | 2014 |
|
RU2585648C2 |
| METHOD OF PRODUCING SYNTHETIC FLUORITE AND CAUSTIC SODA SOLUTION | 2023 |
|
RU2816485C1 |
| METHOD FOR DEFLUORINATION AND ISOLATION OF ANHYDROUS SODIUM SULPHATE FROM WORKING GAS CLEANING SOLUTIONS OF ALUMINUM ELECTROLYSERS | 2020 |
|
RU2742987C1 |
| PROCEDURE FOR COMPLEX PROCESSING CRUDE SPODUMENE ORE FOR PRODUCTION OF LITHIUM PRODUCTS AND CEMENTS | 2008 |
|
RU2390571C1 |
| TREATMENT METHOD OF CONCENTRATE OF β-SPODUMENE | 2007 |
|
RU2360986C2 |
| METHOD FOR PRODUCING CAUSTIC SODA | 2020 |
|
RU2755186C1 |
| COMPOSITION FOR REGULATING PERMEABILITY OF INHOMOGENEOUS OIL FORMATION | 2010 |
|
RU2447127C2 |
| METHOD OF PRODUCING CHARGE FOR FOAM GLASS CERAMICS | 2018 |
|
RU2701838C1 |
| METHOD OF EXTRACTING LITHIUM FROM SPODUMENE ORE | 2023 |
|
RU2824841C2 |
