引用本文:
Jie LU, Guan Ying YANG, Ling ZHAO, Bu Xing HAN, Hai Ke YAN. Pressure Effect on the Local Composition SurroundingEthyl Acetoacetate in Supercritical CO2- Ethanol Mixture[J]. Chinese Chemical Letters,
1998, 9(2): 191-196.
Citation: Jie LU, Guan Ying YANG, Ling ZHAO, Bu Xing HAN, Hai Ke YAN. Pressure Effect on the Local Composition SurroundingEthyl Acetoacetate in Supercritical CO2- Ethanol Mixture[J]. Chinese Chemical Letters, 1998, 9(2): 191-196.
Citation: Jie LU, Guan Ying YANG, Ling ZHAO, Bu Xing HAN, Hai Ke YAN. Pressure Effect on the Local Composition SurroundingEthyl Acetoacetate in Supercritical CO2- Ethanol Mixture[J]. Chinese Chemical Letters, 1998, 9(2): 191-196.
Pressure Effect on the Local Composition SurroundingEthyl Acetoacetate in Supercritical CO2- Ethanol Mixture
摘要:
The keto-enol tautomerization of ethyl acetoacetate (EAA) in supercritical CO2-ethanol mixture has been investigated at 308.15 K and at different pressures using UV-Vis spectroscopy. A method for calculating the local composition about EAA has been developed based on the relationship between the equilibrium constant and dielectric property of the mixing solvent. The results indicate that the local concentration of ethanol surrounding EAA is much higher than that in the bulk.
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关键词:
- supercritical CO2
- / ethanol
- / cosolvent
- / cluster
- / local density enhancement
English
Pressure Effect on the Local Composition SurroundingEthyl Acetoacetate in Supercritical CO2- Ethanol Mixture
Abstract:
The keto-enol tautomerization of ethyl acetoacetate (EAA) in supercritical CO2-ethanol mixture has been investigated at 308.15 K and at different pressures using UV-Vis spectroscopy. A method for calculating the local composition about EAA has been developed based on the relationship between the equilibrium constant and dielectric property of the mixing solvent. The results indicate that the local concentration of ethanol surrounding EAA is much higher than that in the bulk.
-
Key words:
- supercritical CO2
- / ethanol
- / cosolvent
- / cluster
- / local density enhancement
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