硫代硫酸钠合成条件的优化

Improvement of Synthesis Condition of Sodium Thiohsulfate

优化了亚硫酸钠与硫磺反应制备硫代硫酸钠的合成条件 ,最佳反应条件为 :亚硫酸钠与硫磺质量比为 7∶2 ,亚硫酸钠与水质量比为 1∶1,溶液pH =10 ,反应时间 3 0min ,此时亚硫酸钠转化率为95 .9% ,产品纯度 98.9% ,收率 94.5 %。

When sodium sulfite and sulfer are used together to prepare sodiumthiosulfate,after the improvement of synthesis condition,the new method possesses many features,and reduces the cost needed. The best synthesis condition is as follows Na 2CO 3∶S=7∶2;Na 2SO 3∶H 2O=1∶1,pH=10,reaction time is 30 min; conversion of Na 2SO 3 is 95.9 %;purity of products is 98.9 %;yield is 94.5 %.