A5008044424- Ionic liquids properties and applications
- Catalysis and Oxidation Reactions
- Phase Equilibria and Thermodynamics
- Oxidative Organic Chemistry Reactions
- Carbon dioxide utilization in catalysis
- Chemistry and Chemical Engineering
- Extraction and Separation Processes
- Asymmetric Synthesis and Catalysis
- Subcritical and Supercritical Water Processes
- Carbon Dioxide Capture Technologies
- Catalysis for Biomass Conversion
- Catalysts for Methane Reforming
- Analytical Chemistry and Chromatography
- Polymer Foaming and Composites
Universidade Nova de Lisboa
2003-2011
Rede de Química e Tecnologia
2005-2011
A supported ionic liquid phase (SILP) catalyst prepared from [PrMIM][Ph(2)P(3-C(6)H(4)SO(3))] (PrMIM = 1-propyl-3-methylimidazolium), [Rh(CO)(2)(acac)] (acacH 2,4-pentanedione) [OctMIM]NTf(2) (OctMIM 1-n-octyl-3-methylimidazolium, Tf CF(3)SO(2)) and microporous silica has been used for the continuous flow hydroformylation of 1-octene in presence compressed CO(2). Statistical experimental design was to show that reaction rate is neither much affected by film thickness (IL loading) nor...
This paper presents the advantages of combining two alternative solvents in asymmetric dihydroxylation (AD) olefins: chiral ionic liquids (CIL) as chirality-inducing media and supercritical CO2, extraction media. Initially, AD reaction was optimized using 1-hexene model substrate source, guanidinium ([(di-h)2dmg]) based on anions such (S)-mandelate, (R)-mandelate, quinic, l-lactic, (S)-camphorsulfonate, BOC-hydroxyproline, acetylhydroxyproline. In first approach, [(di-h)2dmg][quinic]...
The combination of ionic liquids (ILs) as solvents in the asymmetric Sharpless dihydroxylation (AD) with use scCO(2) separation process allows a very simple, efficient, clean and robust system for reuse AD catalytic system, which also does not need organic either reaction or products isolation diol, high yield enantiomeric excess basically without contamination osmium.
The best of both worlds: Phase changes in ionic liquid + water systems, induced by addition ethanol and supercritical carbon dioxide, allow reaction cycles to proceed as depicted, combining the high rates one-phase conditions with easy separation products; characteristic biphasic catalysis. (usually slow) epoxidation isophorone hydrogen peroxide, catalysed sodium hydroxide, was rapidly carried out these conditions, complete recovery product CO2 decompression. Supporting information for this...
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