Preparation of Sulfonic Acid on Silica Surface through Si-C bond for Immobilization of Polyketone Catalyst
- 주제(키워드) silica , polyketone
- 발행기관 아주대학교
- 지도교수 이분열
- 발행년도 2015
- 학위수여년월 2015. 8
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000020231
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Sulfonic acid groups were anchored on silica surface through the robust Si-C bond. Successive treatment of benzylmagnesium chloride and H2SO4 to dehydroxylated silica afforded the silica tethering -CH2C6H4SO3H groups with high surface coverage (0.50-CH2C6H4SO3H/nm2). Pore structure was well preserved in this surface modification process. The -CH2C6H4SO3H groups on the surface were successfully utilized in preparation of supported catalyst for polyketone production; ?Si-CH2C6H4SO3H groups on surface was reacted with [1,3-bis(di(2-methoxyphenyl)phosphino)propane]Pd(OAc)2 to generate dicationic palladium species which were anchored on silica surface through the ionic interaction with sulfonate anion generated on the surface. The supported catalyst prepared in this way showed a high activity (up to 43 kg/g-Pd or 0.61 Kg/g-cat) in CO/ethylene copolymerization. Morphology of polymer particles replicated that of the silica particles consequently to generate polymer powder of high bulk density (0.30 g/mL) with negligible reactor fouling.
more목차
Abstract
1.Introduction
2. Results and Discussion
2.1 Anchoring sulfonic acid groups on silica surface
2.2 Preparation of supported catalyst
2.3 Ethylene/CO copolymerization
3. Conclusions
4. Experimental
4.1 General remarks
4.2 Attachment of -CH2C6H5 group on silica surface
4.3 Sulfonation
4.4 Preparation of catalyst
4.5 Ethylene/CO copolymerization
5. Acknowledgements
6. Reference
7. Supportinginformation
