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Citation: ZHENG Yan, ZHAO Ji-Quan, GE Feng-Yan, LI Ya-Ling. Catalytic Epoxidation of Cyclohexene over Encapsulated Ni(acac)₂·2H₂O Catalysts[J]. Chinese Journal of Applied Chemistry, ;2003, 20(5): 470-473. shu

Catalytic Epoxidation of Cyclohexene over Encapsulated Ni(acac)₂·2H₂O Catalysts

1.
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130

Corresponding author: ZHAO Ji-Quan,
Received Date: 16 July 2002
Available Online: 24 February 2003
Fund Project: 河北省自然科学基金资助项目(200008) (200008)

Ni(acac)₂·2H₂O was encapsulated in SiO₂ by a Sol-gel method and used in epoxidation of cyclohexene.The catalysts were characterized by FT-IR spectroscopy and BET.The best encapsulation conditions were pH=3,n(H₂O)/n(Si)=6,drying temperature 80℃.The activity of the encapsulated Ni(acac)₂ catalyst decreased not much after 3 experiments.The prepared encapsulated catalyst has the advantages of avoiding corrosion of apparatus,regeneration and high yield of epoxide of cyclohexene (ECH) as compared with encapsulated Fe(acac)₃ and Co(acac)₂·2H₂O.
- cyclohexene,
- epoxidation,
- nickel(Ⅱ)acetyacetonate,
- encapsulated catalysts
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Catalytic Epoxidation of Cyclohexene over Encapsulated Ni(acac)₂·2H₂O Catalysts