1874-62-0Relevant articles and documents
Control of Product Selectivity for the Epoxidation of Allyl Alcohol by Variation of the Acidity of the Catalyst TS-1
Hutchings, Graham J.,Lee, Darren F.
, p. 1095 - 1096 (1994)
The acidity of TS-1 controls the product selectivity for the epoxidation of allyl alcohol with H2O2; base treatment of TS-1 enhances the selectivity to glycidol whereas incorporation of Broensted acid sites enhances the selectivity to the products of solvolysis ring opening reactions.
Optimization of the synthesis of glycerol derived monoethers from glycidol by means of heterogeneous acid catalysis
Pires, Elisabet,García, José Ignacio,Leal-Duaso, Alejandro,Mayoral, José Antonio,García-Peiro, José Ignacio,Velázquez, David
, (2018/11/24)
We present an efficient and green methodology for the synthesis of glycerol monoethers, starting from glycidol and different alcohols, by means of heterogeneous acid catalysis. A scope of Br?nsted and Lewis acid catalysts were applied to the benchmark reaction of glycidol and methanol. The selected catalysts were cationic exchangers, such as Nafion NR50, Dowex 50WX2, Amberlyst 15 and K10-Montmorillonite, both in their protonic form and exchanged with Al(III), Zn(II) and Fe(III). Thus, total conversions were reached in short times by using 1 and 5% mol catalyst loading and room temperature, without the need for excess glycidol or the presence of a solvent. Finally, these conditions and the best catalysts were successfully applied to the reaction of glycidol with several alcohols such as butanol or isopropanol.
Glycerol as a source of designer solvents: Physicochemical properties of low melting mixtures containing glycerol ethers and ammonium salts
Leal-Duaso, Alejandro,Pérez, Pascual,Mayoral, José A.,Pires, Elisabet,García, José I.
, p. 28302 - 28312 (2017/11/06)
In this work we report the preparation of mixtures of several alkyl glyceryl ethers, as hydrogen bond donor compounds, with two ammonium salts, choline chloride and N,N,N-triethyl-2,3-dihydroxypropan-1-aminium chloride. The stability of the mixtures at different molar ratios and temperatures has been evaluated in order to determine the formation of low melting mixtures. Liquid and stable mixtures have been characterized and their physico-chemical properties such as density, viscosity, refractive index, conductivity and surface tension have been measured in the temperature range of 293.15 K to 343.15 K. Comparison of the mixtures prepared herein with the ones containing glycerol and choline chloride evidences the possibility of tuning the physico-chemical properties by changing the substitution pattern in the hydrogen bond donor compound or in the ammonium salt, thus broadening the scope of application of these mixtures.
