摘要
还原红14是一种重要的还原染料,由橙7和还原红15两种互为正反异构体的物质组成,主要由萘四甲酸和邻苯二胺反应生成。本文研究了在微波场存在下萘四甲酸与邻苯二胺的合成反应,分别考察了反应温度(130～160℃)、反应时间(5～40 min)、加热方式对产物组成的影响。结果表明:基于微波与极性物质分子的相互作用,反应温度和时间及加热速率对产品组成影响较大,且温度越高,生成的反式产物越高。反应温度160℃、反应时间40 min时,反式产物含量达到最大值61%。延长反应时间有利于反式产物的生成。反应温度在60～100℃的预缩合反应有利于反式产物的生成。
The main method to produce vat red 14,a kind of vat dye,is through the reaction of naphthalenetetracarboxylic acid and o-phenylenediamine with the presence of catalyst.There exist two isomers of vat red 14,the trans-structure is named orange 7 and the cis-structure is named vat red 15.The investigations of microwave heating in the synthesis of vat red 14 were carried out,and the effects of different temperatures（130—160 ℃）,reaction times（5—40 min）,and heating rates were discussed.It was found that temperature,reaction time and heating rate were the key factors determining the reaction products.Cis-product decreased with increasing temperature,and long reaction time favored trans-product.Trans-product could reach as high as 61% at temperature of 160 ℃ and reaction time of 40 min.It was also found that pre-synthesis at 60—100 ℃ favored the formation of the trans-product.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2011年第8期1832-1836,共5页
Chemical Industry and Engineering Progress
基金
高等学校博士学科点专项科研基金资助课题(200804251020)
关键词
微波加热
还原红14
萘四甲酸
邻苯二胺
microwave heating
vat red 14
aphthalenetetracarboxylic acid
o-phenylenediamine
