화학공학소재연구정보센터
Applied Chemistry, Vol.9, No.1, 189-192, May, 2005
Coal tar 유분 중에 함유된 indole의 최적 추출용매 선택
Optimum solvent selection on extraction of indole contained in coal tar oil fraction
The distribution equilibrium between coal tar oil fraction (temperature range of distillate: 240 ℃~265 ℃) and solvent was measured by using aqueous solution of 13 kinds as extraction solvent. The aqueous solution of formamide was found to be an optimum solvent for extracting nitrogen heterocyclic compounds (NHC) such as indole contained in coal tar oil fraction based on the distribution coefficient and selectivity. As the results of the use of the aqueous solution of formaide, both an indole yield of 41.1% and a selectivity of 33.3 for indole in reference to 2-methylnaphthalene were obtained through one stage of a batch equilibrium extraction operation.