| Issue |
Korean Chemical Engineering Research,
Vol.51, No.3, 347-351, 2013
Vol.51, No.3, 347-351, 2013
글리세롤과 요소로부터 글리세롤카보네이트 합성에서 이온성액체의 촉매 특성
Catalytic Performance of Ionic Liquids in the Synthesis of Glycerol Carbonate from Glycerol and Urea
글리세롤과 요소의 카르보닐화 반응에 의한 글리세롤카보네이트(GC)의 제조반응에 대하여 이온성 액체 촉매의 특성을 조사한 결과 사용된 4급암모늄염 촉매와 이미다졸염 촉매의 알킬기의 길이가 짧을수록, 할로겐 음이온의 친핵성이 클수록 촉매의 활성은 증가하였다. TBAC 촉매에 대해서 반응변수인 반응온도, 반응시간, 진공도가 반응에 미치는 영향을 고찰하였다. ZnCl2를 조촉매로 사용한 경우 각각 촉매의 활성보다 더 높은 활성을 나타내어 시너지 효과가 관찰되었으며, 이것은 혼합촉매의 산-염기적 특성에 기인하는 것으로 판단된다.
The preparation of glycerol carbonate (GC) from urea through carbonylation with renewable glycerol was investigated by using ionic liquid catalysts. It was found that quaternary ammonium salt and imidazolium salt ionic liquids with a shorter alkyl chain length and higher nucleophilic anion showed better catalytic performance. The effects of reaction temperature, reaction time and degree of vacuum on the reactivity of TBAC catalyst ware discussed. Zinc chloride (ZnCl2) was used as co-catalyst with the ionic liquid catalyst. The mixed catalyst showed a synergy effect on the glycerol conversion and GC yield probably due to the acid-base properties of the catalysts.
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