摘要
以二溴甲烷和硫氰酸钠为原料,乙醇-水为溶剂,化合物R为相转移催化剂合成了二硫氰基甲烷。通过选择催化剂种类,探讨了催化剂用量、反应时间、反应温度和乙醇-水溶液浓度对收率的影响。适宜的工艺条件为:n(二溴甲烷)∶n(硫氰酸钠)=1∶2,反应温度85℃,反应时间7 h,10%的乙醇-水溶液用量为70 mL,催化剂R的用量为0.18 g(二溴甲烷质量的1.14%),反应收率为82.0%。
Methylene Bisthioeyanate was synthesized by dibromomethane with sodium thioeyanate in ethanol-water using compound R as phase transfer catalyst. The effect of the kind of catalyst, the quantity of catalyst, reaction time and reaction temperature were discussed. The optimum reaction conditions were established as followed： n（ dibromomethane） ： n（ sodium Sulfoeyanide） = 1.0：2.0, catalyst R 0.18g , in 70mL 10% ethanolwater solution, reaction time 7h at 85℃ ,and the yield was 82%.
出处
《化工技术与开发》
CAS
2007年第2期7-9,共3页
Technology & Development of Chemical Industry
关键词
二溴甲烷
硫氰酸钠
二硫氰基甲烷
合成
dibromomethane
sodium thiocyanate
methylene bisthiocyanate
synthesis
