Proceedings of the KAIS Fall Conference (한국산학기술학회:학술대회논문집)
- 2011.05a
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- Pages.144-146
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- 2011
Catalytic performance of Al-MCM-48 molecular sieves in the isopropylation of phenol with isopropyl acetate
isopropyl acetate을 이용한 페놀의 isopropylation 반응의 Al-MCM-48 분자체 촉매반응 특성
- Venkatachalam, Kandan (Chemical Engineering Department, Hanseo University) ;
- Hemalatha, Pushparaj (Chemical Engineering Department, Hanseo University) ;
- Peng, Mei-Mei (Chemical Engineering Department, Hanseo University) ;
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Jang, Hyun-Tae
(Chemical Engineering Department, Hanseo University)
- 칸단 벤카타찰람 (한서대학교 화학공학과) ;
- 푸시파라지 헤마라다 (한서대학교 화학공학과) ;
- 팽메이메이 (한서대학교 화학공학과) ;
-
장현태
(한서대학교 화학공학과)
- Published : 2011.05.27
Abstract
Al-MCM-48 molecular sieves (Si/Al = 25, 50, 75 and 100) were synthesized hydrothermally using cetyltrimethyl ammonium bromide as the structure directing template. The orderly arrangement of mesopores was evident from the low angle X-ray diffraction patterns and TEM images. The catalytic performance was evaluated in the vapour phase isopropylation of phenol with isopropyl acetate. Phenol conversion decreased with increase in the Si/Al ratio of the catalysts. The major reaction product was 4-isopropyl phenol (selectivity: 78%). Delocalization of phenolic oxygen electron pair over the aromatic ring promoted para-selective alkylation. Such delocalization could be aided by the hydrophilic surface of the molecular sieves. Though ester was used as the alkylating agent, phenyl isopropyl ether was not formed
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