ClO_2氧化水中联苯胺类化合物的动力学规律  

Study on Kinetic Laws of Benzidines in Water Oxidation with Chlorine Dioxide

作　　者：曹向禹[1] 

机构地区：[1]齐齐哈尔大学轻工与纺织学院,黑龙江齐齐哈尔161006

出　　处：《纸和造纸》2013年第2期25-27,共3页Paper and Paper Making

基　　金：黑龙江青年学术骨干支持计划项目(1252G071)

摘　　要：采用高效液相色谱技术对ClO2与10种联苯胺类化合物的氧化反应动力学进行了研究。结果表明,ClO_2氧化联苯胺类化合物的反应对于联苯胺类化合物和ClO_2均为一级反应,总反应级数为二级。在pH6.5和温度25℃的条件下,10种联苯胺类化合物与ClO_2反应速率常数的顺序为:2,2′,5,5′-四氯联苯胺、2,2′-二氯联苯胺、3,3′-二氯联苯胺>2,2′-二磺酸联苯胺>3,3′-二氨基联苯胺>联苯胺>2,2′-二甲基联苯胺、3,3′-二甲基联苯胺>3,3′-二甲氧基联苯胺>3,3′,5,5′-四甲基联苯胺。并指出反应速率常数的大小顺序与联苯胺类化合物结构中4和4′位氨基N-H键能的强弱有关。Kinetics of reaction between ClO2 and 10 kinds of benzidines were investigated by means of high performance liquid chromatography （HPLC）.Ihe results showed that reactions were first-order in respect to both benzidines and C102 and the overall reactions could be described as second-order reactions. Under the conditions ofpH 6.5 and 25℃, rate constants of 10 kinds ofbenzidines studied were： 2, 2＇, 5, 5＇-tetrachlorobenzidine, 2, 2＇-dichlorobenzidine, 3, 3＇-dichlorobenzidine 〉2, 2＇-benzidinedisulfonicadd〉3, 3 diaminobenzidine 〉benzidine〉 2, 2＇-dimethylbenzidine, 3, 3＇-dimethylbenzidine〉3, 3＇-dimethoxybenzidine〉3, 3＇, 5, 5＇-tetramethyl-benzidine. And it was pointed out that the sequence of the above rate constants （k） depended on the N-H bond energy of the 4 and 4＇ positions on the benzene ring of benzidines.

关 键 词：CLO2 联苯胺类化合物 动力学规律 

分 类 号：X50[环境科学与工程—环境工程]