Enhancing the rate of the Diels-Alder reaction using CO(sub 2)+ ethanol and CO(sub 2)+ n-hexane mixed solvents of different phase regions
Article Abstract:
The reaction rate of the Diels-Alder reaction between N-ethylmaleimide and 9-hydroxymethylanthrance in CO(sub 2) + ethanol and CO(sub 2) + hexane mixed solvents of different compositions were determined by in situ UV/vis spectroscopy at 318.15 K and different pressures. The result states that at the same temperature the reaction can not be conducted in pure supercritical CO(sub 2) in the highly compressible region due to the solubility limitation of 9-hydroxymethylanthrance in supercritical CO(sub 2) at the lower pressures, while the reaction can be carried out in the highly compressible mixed solvents, and reaction rate is effective by pressure.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
Phase separation of the reaction system induced by Co2 and conversion enhancement for the esterification of acetic acid with ethanol in ionic liquid
Article Abstract:
The effect of CO2 on the phase behavior of the reaction system and equilibrium conversion for esterification of acetic acid and ethanol in ionic liquid is studied at 60.0 degree Celsius up to 15 MPa. There is only one phase in the reaction system in the absence of CO2 and the pressure of CO2 or the phase behavior of the system affected the equilibrium conversion of the reaction markedly.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
Transesterification between ethyl acetate and n-butanol in compressed CO2 in the critical region of the reaction system
Article Abstract:
The critical parameters, phase behavior, and density of the reaction system for the transesterification between ethyl acetate and n-butanol in compressed CO2 are determined. It is seen that the sensitivity of K(sub x) to pressure is closely related with the K(subT) of the reaction mixtures.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Enhanced intra-aggregate charge separation from binary exictons in mixed J-aggregates of cyanine dyes. Direct voltammetric observation of reversible and irreversible oxidations of two-dimensional J-aggregates of cyanine dye
- Abstracts: Debundling of single-walled nanotubes by dilution: Observation of large populations of individual nanotubes in amide solvent dispersions
- Abstracts: Mechanism of heterogeneous oxidation of carbonyl sulfide on Al(sub 2)O(sub 3): An in situ diffuse reflectance infrared Fourier transform spectroscopy investigation
- Abstracts: Factors determining the deriving forces of DNA formation: Geometrical differences of base pairs, dehydration of bases, and the arginine assisting