JPS5551704A - Treating method for anhydrous sodium dithionite production filtrate - Google Patents
Treating method for anhydrous sodium dithionite production filtrateInfo
- Publication number
- JPS5551704A JPS5551704A JP12282078A JP12282078A JPS5551704A JP S5551704 A JPS5551704 A JP S5551704A JP 12282078 A JP12282078 A JP 12282078A JP 12282078 A JP12282078 A JP 12282078A JP S5551704 A JPS5551704 A JP S5551704A
- Authority
- JP
- Japan
- Prior art keywords
- filtrate
- sodium
- dithionite
- anhydrous sodium
- salts
- 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
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To efficiently recover available salts contg. no sodium thiosulfate from a filtrate, obtd. by separating anhydrous sodium dithionite from a liquid reactant by filtration, by concentrating the filtrate to crystallize dissolved salts followed by hot filtration.
CONSTITUTION: Anhydrous sodium dithionite is produced using sodium formate as raw material. A liquid reactant contg. the dithionite is filtered to separate the dithionite, and the filtrate is concentrated to remove alcohol and water, thus crystallizing dissolved salts. The conc. filtrate is then hot filtered at about 48.2W60°C by centrifugal separation or other method. By this treatment most of salts available for production of anhydrous sodium dithionite can be separation-recovered as a mixt. contg. no sodium thiosulfate. The salts include sodium sulfite, sodium hydrogensulfite and sodium formate.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12282078A JPS5551704A (en) | 1978-10-05 | 1978-10-05 | Treating method for anhydrous sodium dithionite production filtrate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12282078A JPS5551704A (en) | 1978-10-05 | 1978-10-05 | Treating method for anhydrous sodium dithionite production filtrate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5551704A true JPS5551704A (en) | 1980-04-15 |
Family
ID=14845436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12282078A Pending JPS5551704A (en) | 1978-10-05 | 1978-10-05 | Treating method for anhydrous sodium dithionite production filtrate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5551704A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5283046A (en) * | 1989-05-23 | 1994-02-01 | Hoechst Celanese Corporation | Method for re-use of aqueous co-product from manufacture of sodium dithionite |
-
1978
- 1978-10-05 JP JP12282078A patent/JPS5551704A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5283046A (en) * | 1989-05-23 | 1994-02-01 | Hoechst Celanese Corporation | Method for re-use of aqueous co-product from manufacture of sodium dithionite |
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