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제올라이트 촉매를 이용한 p-큐밀페놀의 분해반응
Catalytic Cracking of p-Cumylphenol over Zeolites
HWAHAK KONGHAK, August 1999, 37(4), 510-514(5), NONE
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Abstract
페놀 제조공정 부산물인 p-큐밀페놀의 촉매 분해반응을 산성도와 세공구조가 다른 제올라이트에서 조사하였다. p-큐밀페놀은 페놀과 α-메틸스타이렌으로 분해되며, α-메틸스타이렌은 인덴이나 이량체 등으로 추가 전환된다. 회분식 반응기에 증류기를 설치하여 생성물을 분리하므로, α-메틸스타이렌 수율을 높일 수 있었다. p-큐밀페놀의 전환율은 산량이 많은 촉매에서 높았고, 세공이 작아 세공 내 반응이 억제되는 제올라이트에서는 α-메틸스타이렌 추가반응이 진행되지 않았다. 세공이 크면 세공 내 산점에서도 반응이 진행되어 촉매를 소량 사용하여도 전환율이 높으나, 세공 내에서 α-메틸스타이렌의 추가반응이 진행되어 생성물의 수율은 도리어 낮아진다.
The catalytic cracking of p-cumylphenol, a major component of the byproduct for the manufacturing process of phenol was studied over various zeolites with different acidities and pore structures. p-Cumylphenol was decomposed to phenol and α-methylstyrene, however, α-methylstyrene was consecutively converted to various materials such as indenes and its dimers. With installing a distiller on the batch reactor to separate α-methylstyrene from the reactor, the yield of α-methylstyrene was considerably improved. Conversion of p-cumylphenol was high on the catalyst with a large amount of acid site. The consecutive conversion of α-methylstyrene was suppressed on the zeolite catalyst with small size pores. The catalyst with large size pores showed high conversion irrespective of a small loading amount of catalyst, while the product yield was low due to additional conversion of α-methylstyrene within its large pore.
Keywords
References
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