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Received October 13, 2005
Accepted January 11, 2006
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티타늄 함유 제올라이트 촉매를 이용한 프로필렌 에폭시화반응
Propylene Epoxidation using Titanium-containing Zeolite Catalysts
인하대학교 화학공학과, 402-701 인천시 남구 용현동 253
Department of Chemical Engineering, Inha university, 253, Yonghyun-dong, Nam-gu, Inchon 402-751, Korea
whasahn@inha.ac.kr
Korean Chemical Engineering Research, April 2006, 44(2), 121-128(8), NONE Epub 10 May 2006
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Abstract
티타늄 함유 제올라이트 촉매 TS-1과 Ti-MCM-22를 이용하여 과산화수소를 산화제로 한 프로필렌 에폭시화반응을수행하였으며, 반응에 미치는 촉매량, 한계 반응물인 과산화수소의 양, 교반 속도, 반응 온도, 압력, 용매 및 생성물 억제 효과를 조사하였다. TS-1은 우수한 부분 산화반응 촉매로 표준 반응조건(45oC, 7 atm, 0.5 g catalyst, 2.5 wt％ H2O2,메탄올 용매, 1,000 rpm 교반)에서 95％ 이상의 H2O2 전화율과 94％ 이상의 산화프로필렌(propylene oxide, PO) 선택도를 얻을 수 있었다. 한편 아세토나이트릴(acetonitrile) 용매 하에서 반응 실험을 한 결과 Ti-MCM-22는 99％의 H2O2전화율과 100％에 근접하는 산화프로필렌 선택도를 보이며, 양론비에 가까운 수율을 보였다.
Propylene epoxidation by H2O2 (30％ aqueous) as oxidant was studied in a semi-batch reactor using TS-1catalyst: Effects of reaction temperature, time, pressure, solvent, catalyst and H2O2 concentration on H2O2 conversion(limiting reagent) and product distribution were investigated. Potential inhibition by propylene oxide on the epoxidationrate was also examined. Ti-MCM-22 with MWW zeolytic structure was found to exhibit better performance than TS-1with MFI structure, provide that a proper choice of solvent(acetonitrile) is made.
Keywords
References
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