Abstract

Nitrosation of phenol (POH) was studied by adding hydrochloric acid and sodium nitrite to phenol solution with reaction temperature and time change. The optimum condition of nitrosation was found from the effects of hydrochloric acid and sodium nitrite concentration, reaction temperature, and reaction time changes on the production of nitrosophenol(POHNO). As a result, it was found that the optimum conditions were 5.0x10-4～2.0x10-3 M range of NO2- concentration, more than 0.10 M of HCl concentration, temperature of 80 ℃, and 3 hrs. of reaction time. In this condition, 10 U.S. E.P.A. classified priority environmental pollutant, phenols, were nitrosated. Nitrosated phenols were: POH, 2-Chlorophenol(2ClPOH), 2,4-diChlorophenol(2ClPOH), 2,4-dimethylphenol(24diMPOH), and 4-Chloro -3-methylphenol(4Cl3MPOH), and a small part of 2-nitrophenol(2NPOH). The λmax values of nitrosated phenols in acidic solution were around 300 nm, and those in basic solution were around 400 nm. Molar absorptivities(ε) at the 400 nm of the nitrosated phenols in the basic solution were 1.5～2.0 times larger than those at 300 nm in acidic solution. It was also found by Capillary-HPLC chromatograms of the nitrosated phenol solutions that the production of the nitrosophenols were interfered by the excess concentration of nitrite(more than 3.0x10-3 M).