摘要
以对甲苯胺为原料 ,通过在溶剂中磺化的方法合成出对甲苯胺 -邻磺酸 .讨论了各种反应条件对该反应的影响 .最佳工艺条件为 :以 5 0 m L二氯苯 (工业品 )为溶剂 ,2 %～ 5 %发烟硫酸为磺化剂 ,发烟硫酸与对甲苯胺的摩尔比为 1.10～ 1.12 ,硫酸的进料时间为 10 m in左右 ,成盐时间 2 h,蒸馏 8h.此条件下制得的产品优于国外同种产品 .
Synthesis of p toluidine o sulfonic acid from p toluidine by sulfonation in solvent was studied,and effects of various reaction conditions or factors on the reaction were discussed in detail.As a result,the following optimum process conditions are presented:50 mL dichlorobenzene,2%～5% oleum,molar ratio of sulfonating agent to p toluidine is 1.10～1.12,oleum is dropped in the reaction system in 10 min or so,sulfate formation time is 2 h,distillation lasts 8 h.Under the above conditions,the purity and the yield of p toluidine o sulfonic acid are better than that of the same product made in Japan.
关键词
对甲苯胺-邻磺酸
磺化
对甲苯胺
二氯苯
p toluidine o sulfonic acid
sulfonation
p toluidine
dichlorobenzene
