FIELD: chemistry.
SUBSTANCE: invention relates to production of a diluted solution of caustic soda using an ion-exchange technique. The method of producing a diluted solution of caustic soda from carbon dioxide formed from burning wastes, calcium hydroxide and sodium chloride, includes reacting salty water or acidic salty water with carbon dioxide and calcium hydroxide in a complex membrane system to obtain sodium carbonate. The obtained sodium carbonate is then reacted with calcium hydroxide to obtain sodium hydroxide. Energy from burning solid wastes is used to conduct the reaction between the sodium carbonate and calcium hydroxide.
EFFECT: invention provides more efficient production of Na2CO3 and NaOH using waste heat and enables to bind carbon dioxide gas and acidic gases.
13 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING ALKALI METAL CARBONATE, METHOD OF PRODUCING SODIUM CARBONATE, METHOD OF PURIFYING BRINE | 1994 |
|
RU2099286C1 |
| REMOVAL OF CARBON DIOXIDE FROM FLOW OF WASTES BY COMBINED PRODUCTION OF CARBONATE AND/OR BICARBONATE MINERALS | 2008 |
|
RU2477168C2 |
| METHOD OF PRODUCING LITHIUM HYDROXIDE AND LITHIUM CARBONATE | 2016 |
|
RU2683080C1 |
| METHOD OF SEPARATING HEAVY METALS FROM WATER IN FLUE GAS CONDENSATE | 2008 |
|
RU2531827C2 |
| METHOD FOR SYSTEM PROCESSING OF SEA WATER | 1995 |
|
RU2089511C1 |
| SODIUM HYDROXIDE PRODUCTION PROCESS | 2004 |
|
RU2274604C2 |
| METHOD OF PROCESSING OF SODIUM-FLUORINE-CARBON-CONTAINING WASTE OF ELECTROLYTIC PRODUCTION OF ALUMINIUM | 2016 |
|
RU2624570C1 |
| METHOD FOR DEFLUORINATION AND ISOLATION OF ANHYDROUS SODIUM SULPHATE FROM WORKING GAS CLEANING SOLUTIONS OF ALUMINUM ELECTROLYSERS | 2020 |
|
RU2742987C1 |
| REMOVING CARBON DIOXIDE FROM WASTE STREAMS THROUGH COMBINED PRODUCTION OF CARBONATE AND/OR BICARBONATE MINERALS | 2005 |
|
RU2569093C2 |
| REMOVAL OF CARBON DIOXIDE FROM FLOW OF WASTES BY COMBINED PRODUCTION OF CARBONATE OR BICARBONATE MINERALS | 2005 |
|
RU2420345C2 |
