• Korean Chemical Engineering Research
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• 제46권1호
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• pp.142-146
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• 2008

Titanium silicalite-1 촉매를 $175^{\circ}C$에서 2일간 $SiO_2-TiO_2$ xerogel을 전구체로 사용하여 수열 합성하였고, 이를 이용하여 allylchloride(ALC) 에폭시화 반응의 속도론 인자를 도출하기 위해 반응온도 $25{\sim}55^{\circ}C$, ALC의 농도 0.2~3.0 M, 과산화수소의 농도 0.2~1.5 M 영역에서 촉매 반응실험을 수행하였다. 초기농도법을 이용하여 반응속도를 구한 후, power rate law, Eley-Rideal, 및 Langmuir-Hinshelwood 모델에 적용한 결과, 큰 차이는 없으나 power rate law에서 실험치와 예측치가 가장 우수하게 일치하였고, 이때 활성화 에너지는 29.7 kJ/mol, 과산화수소에 대한 반응차수는 0.41, ALC에 대한 반응차수는 0.52였다.

• Journal of the Korean Wood Science and Technology
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• 제22권4호
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• pp.51-60
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• 1994

Chlorodeoxycellulose derivatives have recently assumed importance since the halogen atoms can be changed with other functional groups to afford new derivatives of cellulose. Also, chlorinated cellulose has been employed as an intermediate in the preparation of various functional cellulose derivatives. In this study chlorodeoxycellulose was prepared by reaction of methylcellulose with mathanesulfonylchloride in N,N-dimethylformamide. Subsequently, conversion of the above chlorinated cellulose to unsaturated celluloseen was carried out by potassium tertiary butoxide in dimethyl sulfoxide. An anhydrocellulose as an intermediate for the reactive functional derivatives was made by simple alkali treatment. Preparation condition of allylated methylcellulose by using allylchloride and its thermal behavior were also described.

• Bulletin of the Korean Chemical Society
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• 제30권8호
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• pp.1778-1782
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• 2009

Mesoporous TS-1 catalysts were prepared via a nanocasting route using two different carbon template sources of CMK-3 and commercial carbon black. Products were characterized by XRD, UV-Vis spectroscopy, SEM, TEM, and $N_2$ adsorption- desorption measurement. The catalytic performances of the samples for allylchloride epoxidation and oxidative desulfurization of the representative refractory sulfur compounds, dibenzothiophene and 4,6-dimethyldibenzothiophene, were compared against those of conventional TS-1. Whilst the allychloride epoxidation activity for the mesoporus TS-1 samples were similar, mesoporous TS-1 exhibited significantly higher catalytic activities than conventional TS-1 in oxidative desulfurization.