溶剂对荧光增白剂OB合成工艺的影响  

Effect of the solvent on synthesis of fluorescent whitening agent OB

作　　者：马建勋 陈斌[2] 

机构地区：[1]绍兴润和安全技术有限公司,浙江绍兴312000 [2]绍兴文理学院化学化工学院,浙江绍兴312000

出　　处：《应用化工》2007年第7期732-733,736,共3页Applied Chemical Industry

摘　　要：以噻吩-2,5-二羧酸和邻氨基对叔丁基苯酚为主要原料合成荧光增白剂OB,在氮气保护下,加入适量催化剂,反应控制在140～150 ℃和210～220 ℃两个温度段进行,探讨不同溶剂及用量对收率的影响.结果表明,以三氯化苯为溶剂,其用量控制在2 L/mol噻吩-2,5-二羧酸,并在回流管中加甲苯作为助溶剂,在此条件下,合成得到的荧光增白剂OB熔点200～201 ℃,含量99%以上,收率86%以上.The fluorescent whitening agent OB was prepared from thiophene-2,5-dicarboxylic acid and 2-amino-4-tert-butylphenol. The synthetic methods were investigated, and the influence of various solvents and their addition amount on the yield of product were discussed particularly. The optimum solvent was phenyl-trichloride with addition amount of 2 L/mol of thiophene-2,5-dicarboxylic acid, and toluene was added as the auxiliary solvent during refluxing. The reaction was properly catalyzed in N2 atmosphere and carded out in two stages of different temperatures respectively at 140 - 150 ℃ and 210 - 220 ℃. Under such conditions, the yield of fluorescent whitening agent OB （m. p. ：200 -201 ℃ ） was more than 86% with purity of 99%.

关 键 词：荧光增白剂OB 合成 溶剂 

分 类 号：TQ610.495[化学工程—精细化工]