A quantitative one-pot synthesis method for industrial azo pigments with recyclable wastewater
作者:Guangyuan Feng、Meiling Zhu、Lei Liu、Chunbao Li
DOI:10.1039/c8gc03982h
日期:——
coupling component. The reactions were fast and quantitative. The granular PTFE, wastewater and excess HCl were then reused 11 times without deteriorating the reaction rate and product purity. Altogether, 22 industrial pigments and 3 azo compounds were synthesized and the reaction can produce up to 22.7 g of product in the laboratory. Some reactions require less than 2 equiv. of HCl and a mechanism explaining
大多数工业偶氮颜料是通过在一个罐中进行重氮化,然后在另一个罐中偶合来合成的。通过将颗粒状PTFE(聚四氟乙烯)添加到机械搅拌的NaNO 2水性混合物中,此两锅法已转变为一锅法。,HCl,重氮组分和偶合组分。该方法避免了使用碱或表面活性剂溶解偶联组分的步骤。反应是快速和定量的。然后将颗粒状PTFE,废水和过量的HCl再使用11次,而不会降低反应速度和产物纯度。总共合成了22种工业颜料和3种偶氮化合物,该反应在实验室中最多可生产22.7 g产品。一些反应需要少于2当量。提出了HCl的解释和解释它的机理。此外,直径:硝基组效果是在先进的反应速率为耦合来解释差异ø - ,米-和p硝基苯胺。