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HWAHAK KONGHAK,
Vol.29, No.6, 687-692, 1991
Vol.29, No.6, 687-692, 1991
Allyl Chloride의 Epoxidation 반응 연구-I. 균일상 몰리브덴촉매의 반응활성 및 반응메카니즘
Study on the Epoxidation of Allyl Chloride-I. Catalytic Activity and Reaction Mechanism of Homogeneous Molybdenum Catalysts
여러 가지 Mo 촉매 존재하에서 allyl chloride를 tert-butyl hydroperoxide로 액상 epoxidation시키는 연구가 회분식반응기를 이용하여 이루어졌다. 반응은 1,1,2,2-tetrachloroethane 용액중에서 반응온도 53-76℃, 상압, 촉매농도 1.5×10-3몰의 조건에서 수행하였으며, MoO2(acetylacetone)2와 MoCl5가 활성 및 선택성면에서 가장 좋은 촉매로 나타났다. Epoxidation은 부반응 생성물인 tert-butyl alcohol, 피리딘 등과 같은 Lewis 염기에 의하여 매우 심하게 활성이 저하되었다. MoO2(acetylacetonate)2 촉매계에 대한 반응속도 자료를 얻었으며, Michaelis-Menten 속도론으로 나타낼 수 있었다.
Homogeneous liquid phase epoxidation of allyl chloride with tert-butyl hydroperoxide was carried out in the presence of various Mo catalysts in a batch reactor. The reaction has been carried out at 53-76℃ and 1atm with 1.5×103mol/liter of catalyst in 1,1,2,2-tetrachloroethane solution. MoO2(acetylacetonate)2 and MoCl5 were found to be the most active and selective catalyst. The epoxidation was strogly inhibited by Lewis base such as tert-butyl alcohol, pyridine and water. Kinetic data were obtained for the MoO2(acetyl-acetonate)2 catalyst system and could be represented by Michaelis-Menten kinetics.
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