阳离子黄X-5GL合成工艺优化

Optimization of the Synthesis Process of Cationic Yellow X-5GL

本文对阳离子黄X-5GL合成工艺进行了优化。以产品纯度、强度以及色光为指标,采用单因素分析的方法分析了重氮反应体系硫酸含量、偶合反应温度、母体转晶温度以及盐析pH对染料的影响,得到了该染料的最佳制备工艺:重氮反应体系硫酸含量9%,偶合反应温度0℃,母体转晶温度40℃,盐析pH为5,在此条件下得到的阳离子黄X-5GL母体纯度98.94%,强度670%,色光为近似,绿0.05。

The synthesis process of Cationic Yellow X-5GL was optimized.Based on product purity(HPLC),relative strength and shade of the dye,the effect of sulfuric acid content in diazotization reaction,coupling reaction temperature,temperature of dye crystalline forms,and pH of salting out on the dye was analyzed by single factor experiments.The optimal preparation process for the dye was obtained as follows:sulfuric acid content in the diazotization reaction was 9%,coupling reaction temperature was 0℃,temperature of dye crystalline forms was 40℃,and pH of salting out was 5.In the conditions,the purity of the Cationic Yellow X-5GL was 98.94%,strength was 670%,and the shade was from no difference to a value of green 0.05.