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|標題:||Phase-transfer catalyzed allylation of sodium phenoxide in a solid-liquid system|
|期刊/報告no：:||Journal of Molecular Catalysis a-Chemical, Volume 153, Issue 1-2, Page(s) 83-91.|
|摘要:||The kinetics for the O-allylation of sodium phenoxide with allyl bromide was investigated in the presence of phase-transfer catalyst in a solid-liquid system. The reaction was carried out in a stirred batch reactor under very mild operating conditions. The role of phase-transfer catalytic intermediate in the solid-liquid system was explored. Effects of various operating variables were performed. When the degree of agitation exceeded 200 rpm, the mass transfer resistance at the solid-liquid interface can be ignored. A kinetic model was proposed for the solid-liquid etherification and the experimental data were well described by the pseudo-first-order equation. The apparent activation energy was also obtained as 60.92 kJ mol(-1) for tetra-n-butylammonium bromide (TBAB) as the catalyst. Experimental results also show that C-alkylation of sodium phenoxide with allyl bromide would not occur under the appropriate phase-transfer conditions. (C) 2000 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||化學工程學系所|
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