JPS5442394A - Manufacture of sodium dithionite - Google Patents
Manufacture of sodium dithioniteInfo
- Publication number
- JPS5442394A JPS5442394A JP10858877A JP10858877A JPS5442394A JP S5442394 A JPS5442394 A JP S5442394A JP 10858877 A JP10858877 A JP 10858877A JP 10858877 A JP10858877 A JP 10858877A JP S5442394 A JPS5442394 A JP S5442394A
- Authority
- JP
- Japan
- Prior art keywords
- cathodic
- electrolysis
- liquor
- anodic
- cationic exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
PURPOSE: To make a high purity anhydrous Na2S2O4 with high efficiency by performing an electrolysis in which a concentrated sodium chloride solution and SO2 are introduced into each of the anodic and cathodic rooms, fach being isolated by a cationic exchange membrane, while circulating the cathodic liquor kept in a predetermined pH range, using Ni cathode.
CONSTITUTION: Electrolysis is performed by introducing a concentrated sodium chloride solution into the anodic room of an electrolytic bath, in which the anodic and cathodic rooms are separated by a cationic exchange membrane (for example, refluorosulfonic acid cationic exchange membrance), introducing SO2 gas into the cathodic room filled with a NaHSO3 aqueous solution. In this case, Ni is used as the cathode, and the electrolysis is made while circulating the cathodic liquor kepy at pH 5.5 to 6.5 Afterwards, the electrolysis is stopped at a stage that the cathodic liquor reaches a concentration (approx. 10%) enough to crystallize Na2S2O4.2H2O as electrolysis proceeds, and then cathodic liquor is drawn out. And, salting-out agent, e.g., alcohos, etc. is added to the cathodic liquor to crystallize Na2S2O4. 2H2O for recovery. In this method, the conversion rate of SO2 into Na2S2O4. 2H2- Okεis 85 to 95%, and the purity of the Na2S2O4.2H2O is approx. 90 to 95%.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10858877A JPS5442394A (en) | 1977-09-09 | 1977-09-09 | Manufacture of sodium dithionite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10858877A JPS5442394A (en) | 1977-09-09 | 1977-09-09 | Manufacture of sodium dithionite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5442394A true JPS5442394A (en) | 1979-04-04 |
Family
ID=14488603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10858877A Pending JPS5442394A (en) | 1977-09-09 | 1977-09-09 | Manufacture of sodium dithionite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5442394A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004532352A (en) * | 2001-04-27 | 2004-10-21 | アイレンブルガー エレクトロリーゼ− ウント ウムヴェルトテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Process for the simultaneous electrochemical production of sodium dithionite and sodium peroxodisulfate |
-
1977
- 1977-09-09 JP JP10858877A patent/JPS5442394A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004532352A (en) * | 2001-04-27 | 2004-10-21 | アイレンブルガー エレクトロリーゼ− ウント ウムヴェルトテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Process for the simultaneous electrochemical production of sodium dithionite and sodium peroxodisulfate |
| JP4880865B2 (en) * | 2001-04-27 | 2012-02-22 | アイレンブルガー エレクトロリーゼ− ウント ウムヴェルトテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Process for simultaneous electrochemical production of sodium dithionite and sodium peroxodisulfate |
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