Model studies in aqueous chlorination: The chlorination of phenols in dilute aqueous solution
Titel:
Model studies in aqueous chlorination: The chlorination of phenols in dilute aqueous solution
Auteur:
Smith, James G. Lee, Siow-Fong
Verschenen in:
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering
Paginering:
Jaargang 13 (1978) nr. 1 pagina's 61-71
Jaar:
1978
Inhoud:
A study of the reaction between dilute aqueous solutions of hypo-chlorous acid at initial pH's of 6.0 and 3.5 with 2,6-dichloro- and 2,4-dichlorophenol and 2,4,5-trichlorophenol is described. Extensive chlorination and/or oxidation of the phenols is observed. Identification of the products showed that reactions which occurred involve chlorination to more chlorinated phenols, oxidation to chloro-p-benzoquinones, addition of chlorine to the aromatic ring to form chlorinated 2,5-cyclohexadienones, and addition of 2 moles of chlorine or one each of chlorine and hypo-chlorous acid to give cyclohexenone derivatives. Cleavage of the aromatic ring with loss of one carbon atom was also detected. Earlier, we have described studies of the aqueous chlorination of three chlorinated phenols. Such studies were designed to gain further insight into the process of superchlorination used to disinfect water supplies contaminated with phenol or to destroy phenols present in waste-waters. This report extends our earlier study to 2,6- and 2,4-dichlorophenol and 2,4,5-trichlorophenol.
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