In this study,a continuous-flow procedure containing four steps has been developed to synthesize Pigment Red 53 and modify its crystal structure.This process avoided the problems of conveying highly insoluble reaction...In this study,a continuous-flow procedure containing four steps has been developed to synthesize Pigment Red 53 and modify its crystal structure.This process avoided the problems of conveying highly insoluble reaction intermediates by removing intermediate operating steps.After optimization,the overall yield of Pigment Red 53:1 reached 97.1%in the total residence time of 80 s by this diazotizationcoupling-laking-crystal transition process.From batch to continuous flow,the purity of products increased from 97.1%to 98.2%and the median diameter of pigment particles decreased from 14μm to 1.9μm.This process achieved a similar crystal transition effect in 18 s as in batch,producingα,δandνcrystals of Pigment Red 53:2 as expected.In conclusion,this continuous-flow procedure displays advantages in both synthesis and crystal transition,indicating another potential use for industrial application.展开更多
基金financial support from Shanghai Municipal Science and Technology Commission (No.21520761100)the Open Project of State Key Laboratory of Chemical Engineering (No. SKL-Ch E-21C07)+1 种基金the Fundamental Research Funds for the Central Universitiesthe Program of Leading Talents (2013)
文摘In this study,a continuous-flow procedure containing four steps has been developed to synthesize Pigment Red 53 and modify its crystal structure.This process avoided the problems of conveying highly insoluble reaction intermediates by removing intermediate operating steps.After optimization,the overall yield of Pigment Red 53:1 reached 97.1%in the total residence time of 80 s by this diazotizationcoupling-laking-crystal transition process.From batch to continuous flow,the purity of products increased from 97.1%to 98.2%and the median diameter of pigment particles decreased from 14μm to 1.9μm.This process achieved a similar crystal transition effect in 18 s as in batch,producingα,δandνcrystals of Pigment Red 53:2 as expected.In conclusion,this continuous-flow procedure displays advantages in both synthesis and crystal transition,indicating another potential use for industrial application.
文摘使用Z-型捏合机对颜料红179的粗品进行颜料化处理,处理后的颜料具有高遮盖性能和易分散性.文中讨论了捏合温度、捏合时间、溶剂及用量等条件对最终产品的色光、色力以及遮盖性能的影响.结果表明,最佳工艺条件为:研磨溶剂为丙三醇,研磨助剂为无水氯化钙,物料与研磨溶剂比1∶1.1,研磨温度65～70℃,研磨时间5 h.
