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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 55, Number 1
JKCSEZ 55(1)
February 20, 2011 

 
Title
Esterification of Methacrylic acid with Ethylene glycol over Heteropolyacid supported on ZSM-5

ZSM-5 위에 지지된 Heteropolyacid 하에서 Methacrylic acid와 Ethylene glycol의 에스테르화 반응
Author
A Prabhakarn, J A Fereiro, Ch Subrahmanyam*

A Prabhakarn, J A Fereiro, Ch Subrahmanyam*
Keywords
에스테르화, 고체 산 촉매, Methacrylate, Heteropolyacid, 제오라이트 , Esterification, Solid acid catalysts, Methacrylate, Heteropolyacid, Zeolites
Abstract
methacrylic acid과 ethylene glycol과의 에스테르화 반응을 ZSM-5에 지지된 heteropolyacids [HPA: H4SiW12O40(STA)와 H3PW12O40(PTA)] 하에서 수행하였다. 비교를 위하여, 지지하지 않은HPA, H2SO4, BF3와 PTSA 하에서 같은 반응을 수행하 였다. 연구한 촉매 중에서, HPA는 H2SO4, BF3와 PTSA와 비교하여 더 좋은 활성을 보여주었다. 촉매 활성을 HPA 지지 ZSM-5 촉매와 비교하였는데, 그 결과 ZSM-5위에 지지된 30 wt% PTA는 bulk PTA와 거의 같은 활성을 나타내었다. 이 반 응은 methacrylic acid에 관하여 1차 속도 법칙을 따랐으며, 반응 생성물은 1H-NMR과 FT-IR을 이용하여 확인하였다.

Esterification of methacrylic acid with ethylene glycol was carried out over Heteropolyacids [HPA: H4SiW12O40 (STA) and H3PW12O40 (PTA)] supported on ZSM-5. For comparison, the same reaction was carried out over unsupported HPA, H2SO4, BF3 and PTSA. Among the catalysts studied, HPA showed better activity compared to H2SO4, BF3 and PTSA. Catalytic activity was compared with HPA supported ZSM-5 catalysts. Typical results indicated that 30 wt% PTA supported on ZSM-5 showed nearly the same activity as that of bulk PTA. It was found that the reaction follows first order kinetics with respect to methacrylic acid. The reaction products were identified by 1H-NMR and FT-IR.

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14 - 18
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