Degradation of a stilbene-type fluorescent whitening agent with hypochlorite: Identification of the degradation products by capillary electrophoresis
作者:Marcelo Blanco、Lidia Jiménez、Ismael Valverde
DOI:10.1002/etc.5620201010
日期:2001.10
that evolve to end products. The intermediates form within minutes to hours and the end products within months. At 60 degrees C or in presence of the previously mentioned transition metals, intermediates form within minutes and the end products within days. The end products of the oxidation are 4-sulfobenzaldehyde and 4,4'-bisaldehyde biphenyl; in the presence of excess of hypochlorite, however, the process
E,E-(4,4'-双[2-磺基苯乙烯基]联苯) (DSBP) 是一种荧光增白剂,被纺织和洗涤剂行业广泛用于增白织物。用于漂白织物的次氯酸盐在室温下会缓慢氧化 DSBP,而在 60 摄氏度时氧化率更高。Fe、Cu 和 Mn 等金属离子可显着加速该过程。在环境温度下,氧化是由二苯乙烯键的断裂引起的,并涉及形成最终产物的各种中间体。中间体在几分钟到几小时内形成,最终产品在几个月内形成。在 60 摄氏度或在前面提到的过渡金属存在下,中间体在几分钟内形成,最终产物在几天内形成。氧化的最终产物是4-磺基苯甲醛和4,4'-双醛联苯;然而,在存在过量次氯酸盐的情况下,该方法产生它们相应的氧化衍生物4-磺基苯甲酸和4,4'-联苯二甲酸。尽管次氯酸盐具有氯化能力,但形成的主要降解产物不含氯。