Txoj Kev Npaj Sodium Thiosulfate Pentahydrate
Oct 31, 2021
1. Sodium sulfite txoj kev: Tom qab dissolving soda tshauv, nws reacts nrog sulfur dioxide (tsim los ntawm hlawv sulfur) los tsim sodium sulfite, ces ntxiv sulfur rau boiling tshuaj, lim, concentration, thiab crystallization kom tau sodium thiosulfate.
2. Sodium sulfide txoj kev: sodium sulfide evaporation residue, sodium carbonate thiab sodium sulfide nyob rau hauv barium sulfide cov dej khib nyiab react nrog sulfur dioxide nyob rau hauv cov sulfur pov tseg gas, los ntawm leej faj nqus, evaporation, thiab crystallization, kom tau sodium thiosulfate.
3. Oxidation, sodium sulfite thiab recrystallization txoj kev: sodium thiosulfate yog tov nrog sodium sulfite, sodium sulfite thiab caustic soda kua tom qab sulfuration thiab oxidation; sodium bisulfite yog sulfurized thiab crude sodium thiosulfate recrystallized, Concentrate thiab crystallize kom tau sodium thiosulfate.
4. Recrystallization method: dissolve crude sodium thiosulfate crystals (los yog siv crude sodium thiosulfate tov), tshem tawm impurities, concentrate, thiab crystallize kom tau sodium thiosulfate.
5. Arsenic-alkali txoj kev los ntxuav cov pa roj los ntawm cov khoom siv: siv cov hauv qab (suav nrog) hauv cov txheej txheem ntawm coke cub gas arsenic-alkali desulfurization, tom qab nqus pom, concentration thiab crystallization, kom tau txais sodium thiosulfate.
