碳酸钠对2-氯吡啶氮氧化物及吡啶硫酮钠色度的影响  

Effects of Na_2CO_3 on Gardner Color of 2-PCL-N-oxide and Sodium Pyrithione

作　　者：葛海峰 张伟[1] 

机构地区：[1]苏州大学材料与化学化工部,江苏苏州215123

出　　处：《广州化工》2017年第22期59-60,78,共3页GuangZhou Chemical Industry

摘　　要：以2-氯吡啶和双氧水为原料,在酸催化下合成2-氯吡啶氮氧化物,然后用氢氧化钙进行催化剂回收,再加入适量的碳酸钠除去残留的钙离子,最后经过滤和精馏得到白度符合企业要求的2-氯吡啶氮氧化物,它可以用于合成重要的化工品吡啶硫酮钠。因碳酸钠的加入显著影响产品质量,因此重点考察了碳酸钠的加入量对2-氯吡啶氮氧化物和吡啶硫酮钠溶液白度和稳定性的影响。Under the catalysis of tungsten acid and phosphoric acid,2-chloropyridine-N-oxide（2-PCL-N-oxide）can be synthesized with 2-chloropyridine and hydrogen peroxide. The catalysts can be recycled with slightly excessive calcium hydroxide,and then moderate sodium carbonate must be added to remove the residual calcium ion. After filtering and rectification,quality of 2-PCL-N-oxide conforming to the enterprise standard can be obtained. Furthermore,2-PCLN-oxide is a significant chemical engineering intermediate to synthesize sodium pyrithione. The amount of sodium carbonate could significantly affect the quality of the products,so the influence of sodium carbonate on the gardner color and stability of 2-PCL-N-oxide and sodium pyrithione were mainly examined.

关 键 词：碳酸钠 2-氯吡啶氮氧化物 吡啶硫酮钠 白度 

分 类 号：TQ063[化学工程]