Dihydrocinchonidine으로 개질된 Rh-Pt/Al2O3 이원금속 촉매를 이용한 Ethyl Pyruvate의 비대칭 수소화Asymmetric Hydrogenation of Ethyl Pyruvate over Bimetallic Rh-Pt/Al2O3 Catalysts Modified with Dihydrocinchonidine
- Other Titles
- Asymmetric Hydrogenation of Ethyl Pyruvate over Bimetallic Rh-Pt/Al2O3 Catalysts Modified with Dihydrocinchonidine
- Authors
- 박융호; 강준석; 조홍백
- Issue Date
- Aug-2006
- Publisher
- 한국공업화학회
- Keywords
- Rh-Pt/Al2O3; bimetallic catalyst; asymmetric hydrogenation; ethyl pyruvate; sequential impregnation; Rh-Pt/Al2O3; bimetallic catalyst; asymmetric hydrogenation; ethyl pyruvate; sequential impregnation
- Citation
- 공업화학, v.17, no.4, pp 369 - 374
- Pages
- 6
- Indexed
- KCI
- Journal Title
- 공업화학
- Volume
- 17
- Number
- 4
- Start Page
- 369
- End Page
- 374
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/45200
- ISSN
- 1225-0112
2288-4505
- Abstract
- Ethyl pyruvate의 비대칭 수소화 반응에 Rh-Pt/Al2O3 이원금속 촉매를 처음으로 적용하고 그 반응특성을 조사하였다. Rh-Pt/Al2O3 촉매는 상용 Pt/Al2O3에 Rh을 담지하거나 Al2O3에 Pt와 Rh을 연속적으로 함침시켜 제조하여, 촉매제법, Rh 함량 및 환원온도에 따라 반응속도, 광학선택도(ee%)가 변화하는 경향을 비교하였으며, XRD, TEM을 통하여 촉매의 물리적 특성을 분석하였다. Rh-Pt/Al2O3 이원금속 촉매는 환원온도가 증가함에 따라 반응속도와 광학순도가 향상되었다(63.6 ee%). 또한 Rh의 함량에 따라서도 촉매 반응속도의 큰 변화를 보여주었는데, 그 변화 경향은 촉매 제조과정에 따라 달랐으나 광학선택도는 모든 이원촉매가 단일촉매에 비해 떨어지는 결과(56~60 ee%)를 나타내었다.
Rh-Pt/Al2O3 catalysts were used for the first time to study its reaction characteristics in the asymmetric hydrogenation of ethyl pyruvate. The catalysts were prepared either by impregnation of Rh on a commercial Pt/Al2O3 or by sequential impregnation of Rh followed by impregnation of Pt on Al2O3. Reaction rate and enantiomeric excess (ee%) were compared according to the preparation method, Rh contents, and the reduction temperature of the catalyst. The physical characteristics of the catalysts were analyzed using XRD and TEM. Bimetallic Rh-Pt/Al2O3 catalysts showed an improved reaction rate and optical purity (63.6 ee%) with increasing the reduction temperature. The variation of the Rh contents as well as the preparation method elicited a big difference on the reaction rate, while enantiomeric excess (ee%) was lower (56∼60%) with all bimetallic catalysts than with monometallic Pt/Al2O3 catalyst.
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