摘要：
实验结果表明,水样的pH控制在6.0～8.0范围,可以同时蒸馏水中的苯酚和苯胺,且蒸馏回收率为98%～103%;有取代基的酚类和芳胺在中性蒸馏条件下的回收率,随结构不同回收率不同。中性蒸馏时,氧化剂KClO4,KClO3,KNO3,H2O2(100mg/L以下)的存在对苯酚和苯胺氧化作用很小,误差不超过±5%,KMnO4和K2S2O8对苯酚和苯胺中性蒸馏时,氧化作用比较显著。合成水样经中性蒸馏后,紫外四阶导数法的测定结果与国家环保局推荐方法的测定结果之间精密度和准确度均无显著差异。
关键词:
中性蒸馏,
分离,
苯酚,
苯胺,
氧化剂
Abstract:
The experimental results show that phenol and aniline can be distilled from water simultaneously when the pH values of the water samples are6.0～8.0.The distilled recoveries of them are98%～103%.The distilled recoveries of the phenol and aniline with substituents are different with structures under the conditions of neutral distillation.When they are under neutral distillation,oxidants,such as KClO4,KClO3,KNO3 or H2O2(below100mg /L)have very little effect on their oxidation,the error is less than±5%.But KMnO4 or K2S2O4 does have obvious effect on their oxidation.After the water sample has experienced neutral distillation,the accuracy and pre-cision of the determination result of ultraviolet4th order derivative spectrophotometry(UV-4ODS)does not have obvious difference with the result determined by the method recommended by the National Bureau of Environ-mental Protection.
Key words:
neutral distillation,
separation,
phenol,
aniline,
oxidant
中图分类号:
李美蓉, 袁存光, 杨国华, 李俊玲. 中性蒸馏同时分离水中的苯酚和苯胺的可行性研究[J]. 工业水处理, 2003, 23(11): 61-64.
Li Meirong, Yuan Cunguang, Yang Guohua, Li Junling. Researches on the feasibility of separating phenol and aniline simultaneously from water by neutral distillation[J]. INDUSTRIAL WATER TREATMENT, 2003, 23(11): 61-64.