PL6469B1 - Method for the production of alkaline dithionite. - Google Patents
Method for the production of alkaline dithionite. Download PDFInfo
- Publication number
- PL6469B1 PL6469B1 PL6469A PL646925A PL6469B1 PL 6469 B1 PL6469 B1 PL 6469B1 PL 6469 A PL6469 A PL 6469A PL 646925 A PL646925 A PL 646925A PL 6469 B1 PL6469 B1 PL 6469B1
- Authority
- PL
- Poland
- Prior art keywords
- production
- alkaline
- sulphite
- acid
- dithionite
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 4
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 title description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 235000002639 sodium chloride Nutrition 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 1
Description
Redukcja kwasnych siarczynów zapo- moca orteci alkalicznych prowadzi do po¬ wstawania nictylko podsiarczynu, lecz cze¬ sciowo postepuje dalej, redukujac go na tiosiarczan, ten zas ostatni na wielotiosiar- czan. Wskutek tego czesc metalu alkalicz¬ nego i czesc kwasu siarkowego zostaje stra¬ cona dla reakcji tworzenia sie siarczynu.Wskutek znacznej rozpuszczalnosci tiosiar¬ czanów i wielotiosiarczanów w wodzie, ilosc ich wzrasta ustawicznie i odpowiednio do tego przejmuje wieksza czesc redukujace¬ go dzialania metalu alkalicznego.Obecnie wykryto, ze mozna znacznie zwiekszyc wydajnosc podsiarczynu, otrzy¬ mywanego dzialaniem metalu alkalicznego na kwasny siarczyn, skoro czesc lugów ma¬ cierzystych usuwac okresowo lub w sposób ciagly i zastepowac je woda lub roztworem soli, np. soli kuchennej, W ten sposób za¬ wartosc tiosiarczanów i wielotiosiarczanów w lugach obniza sie znacznie, podczas, gdy dodajac jednoczesnie lub niejednoczesnie siarczynu kwasnego zawartosc w lugach siarczynu i kwasnego siarczynu utrzymuje sie stale w zadanej ilosci. Dzieki temu ortec metalu alkalicznego napotyka do redukcji wiecej kwasnego siarczynu i mniej tiosiar- nów i wielotiosiarczanów. Wskutek tego wydajnosc podsiarczynu znacznie wzrasta i metoda ta pozwala prowadzic prace w sposób ciagly. PL PLThe reduction of acid sulphites with alkali ortets leads to the formation of nothing but dithiosulphite, but it is partially further reduced to thiosulphate, the latter to polysulphate. As a result, part of the alkali metal and part of the sulfuric acid are lost in the sulfite formation reaction. Due to the high solubility of thiosulphates and polysulphates in water, their amount increases continuously and accordingly takes up most of the alkali metal reducing action. It has now been found that the yield of the dithium sulphite obtained by the action of the alkali metal on acid sulphite can be significantly increased, since part of the mother liquors is periodically or continuously removed and replaced with water or a salt solution, e.g. table salt. the value of thiosulphates and polythiosulphates in the liquors drops significantly, while by adding acid sulphite simultaneously or not simultaneously, the content of sulphite and acid sulphite in the liquors remains constant in the desired amount. Thereby, the alkali metal ortec encounters more acid sulphite and less thiosulphates and polythiosulphates for reduction. As a result, the yield of dithionite increases significantly and this method allows the work to be carried out continuously. PL PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL6469B1 true PL6469B1 (en) | 1927-01-31 |
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