NO943528L - Process for the recovery of sodium hydroxide and sodium chloride from the effluent of a diaphragm cell in the form of solid sodium hydrogen carbonate - Google Patents
Process for the recovery of sodium hydroxide and sodium chloride from the effluent of a diaphragm cell in the form of solid sodium hydrogen carbonateInfo
- Publication number
- NO943528L NO943528L NO943528A NO943528A NO943528L NO 943528 L NO943528 L NO 943528L NO 943528 A NO943528 A NO 943528A NO 943528 A NO943528 A NO 943528A NO 943528 L NO943528 L NO 943528L
- Authority
- NO
- Norway
- Prior art keywords
- effluent
- sodium
- diaphragm cell
- hydrogen carbonate
- sodium hydroxide
- Prior art date
Links
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Fremgangsmåte for utvinning av fast natriumhydrogenkarbonat fra avløpet (1) fra katodekammeret i en diafragmacelle (D- C), og som inneholder natriumhydroksyd og natriumklorid. Avløpet behandles med kar- bondioksyd og ammoniakk (T^) for i hoved- sak å omvandle natriumhydroksydet til na- triumhydrogenkarbonat. Deretter behandles avløpet (2) for å dekomponere ammoniumklo- ridet for å utvikle og resirkulere ammoni- akk uten dannelse av forurensende stoffer (S^) , og det behandlede avløp, som er fritt for NH3, CO2 og alkali, gjenmettes (S) og føres til anodekammeret i diafrag- macellen. I foretrukne utførelser er alle trinn forbundet med hverandre, og de pro- duserte materialer resirkuleres, slik at de eneste fremstilte produkter er klor, hydrogen og natriumhydrogenkarbonat, og det oppstår ingen avfallsprodukter i en kontinuerlig prosess.A process for recovering solid sodium bicarbonate from the effluent (1) from the cathode compartment of a diaphragm cell (D-C) containing sodium hydroxide and sodium chloride. The effluent is treated with carbon dioxide and ammonia (T 2) to essentially convert the sodium hydroxide to sodium bicarbonate. Subsequently, the effluent (2) is treated to decompose the ammonium chloride to develop and recycle ammonia without the formation of pollutants (S 2), and the treated effluent, which is free of NH is fed to the anode chamber of the diaphragm cell. In preferred embodiments, all steps are interconnected and the produced materials are recycled so that the only products produced are chlorine, hydrogen and sodium hydrogen carbonate, and no waste products are produced in a continuous process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/014,621 US5288472A (en) | 1993-02-08 | 1993-02-08 | Process for the recovery of the sodium hydroxide and sodium chloride from the effluent of a diaphragm cell as solid sodium bicarbonate |
| PCT/US1994/001256 WO1994018360A1 (en) | 1993-02-08 | 1994-02-03 | Process for recovering solid sodium bicarbonate from diaphragm cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO943528D0 NO943528D0 (en) | 1994-09-22 |
| NO943528L true NO943528L (en) | 1994-12-07 |
Family
ID=26686307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO943528A NO943528L (en) | 1993-02-08 | 1994-09-22 | Process for the recovery of sodium hydroxide and sodium chloride from the effluent of a diaphragm cell in the form of solid sodium hydrogen carbonate |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO943528L (en) |
-
1994
- 1994-09-22 NO NO943528A patent/NO943528L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO943528D0 (en) | 1994-09-22 |
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