화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.33, No.2, 166-172, April, 2022
DOI10.14478/ace.2022.1008  Export Citation
메탄올 용매추출을 이용한 콜타르 흡수유 중의 인돌 결정화
Indole Crystallization in Coal Tar Absorption Oil using Methanol Solvent Extraction
류희용, 이상헌, 신성순1, †
  • 서울과학기술대학교 화공생명공학과
  • 1오메가에너지환경기술㈜
Heeyong Ryu, Sangheon Lee, and Sungsoon Shin1, †
  • Department of Chemical and Biomolecular Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
  • 1Omega Energy Environmental Technology Co. Ltd., Incheon 22140, Korea
E-mail:
초록
콜타르 흡수유에 함유되어 있는 성분 중 고부가가치의 인돌을 효율적으로 분리, 회수 하기 위하여 추출-증류-결정화의 과정을 거치는 방법으로 천연 인돌 확보 기술을 연구하였다. 본 연구에 사용된 콜타르 흡수유의 주요 성분은 1.2% 나프탈렌, 0.1% 퀴놀린, 0.4% 이소퀴놀린, 6.4% 인돌, 21.0% 1-메틸나프탈렌, 48.8% 2-메틸나프탈렌 그리고 11.7% 비페 닐을 포함하고 있다. 인돌의 분리, 정제를 위해 먼저 메탄올을 용매로 사용하여 콜타르 흡수유 중 인돌 성분을 추출상 으로 분리한 후, 증류법으로 메탄올을 회수하였다. 계속해서 메탄올이 제거된 추출용액에 노말헥산을 혼합한 후 결정 화하여 순도 99.3%의 인돌을 회수하였다. 또한 본 연구 결과를 바탕으로 개략적인 콜타르 흡수유 중 인돌 회수의 공정 을 제안하였다.
A method of efficiently purifying high value-added indole among components of coal tar absorption oil was studied using a step-by-step process of extraction-distillation-crystallization. The coal tar absorption oil used in this study contains 1.2% naphthalene, 0.1% quinoline, 0.4% isoquinoline, 6.4% indole, 21.0% 1-methylnaphthalene, 48.8% 2-methylnaphthalene, and 11.7% biphenyl as main components. For the separation and purification of indole, methanol was first used as a solvent to separate indole species in the coal tar absorption oil into an extract phase. And then methanol was recovered by distillation. Subsequently, an extraction solution where methanol was removed was mixed with normal hexane, and then crystallized to recover indole having a purity of 99.3%. Based on the experiments of this study, a purification process scheme for indole in coal tar absorption oil was proposed.
Keywords:Coal tar absorption oil;Indole;High-purity purification;Extraction;Crystallization
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