활성탄상의 heptafluoropropane 합성에서 반응온도의 효과

Effect of reaction temperature on synthesis of heptafluoropropane over activated carbon

활성탄상에서 hexafluoropropylene (HFP)을 불화하여 heptafluoropropane (HFC-227ea)을 합성하 는 연구를 하였다. 반웅조건은 일정한 주입몰비(HF !HFP)와 정체시간에서 반웅온도를 50'b부터 4 400'b까지 변화하여 실시하였다. 최적의 반웅온도는 HF !HFP몰비 2.5와 정체시간 238초에서 200 'b 정도였다. 이 조건하에서 얻은 HFC-227ea수율은 99%이상이었으며 촉매의 비활성화는 나타나지 않았 다. 따라서 활성탄이 HFC-227ea를 얻기 위해서는 우수한 성놓을 가진 촉매이었다.

The hepatfluoropropane(HFC-227ea) synthesis by fluorinatino of hepafluoroproylene(HFP) over activated carbon has been studied. The reaction temperature was varied from 5<TEX>$0^{\circ}C$</TEX> to 40<TEX>$0^{\circ}C$</TEX> at a constant feed mole ration and a residence time. The optimized reaction temperature was found to be about 20<TEX>$0^{\circ}C$</TEX> at 2.5HF/HFP mole ratio and 238 sec. residence time. From these reaction conditions, the yield of HFC-227ea was obtained above 99% and the deactivation of activated carbon was not appeared. Accordingly, the activated carbon showed good performance to obtain heptafluoropropane by fluorinatin of hexafluoropropylene.