17226-43-6Relevant articles and documents
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)
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.
Catalytic Hydrogenolysis of Solketal on Bifunctional Catalysts with Production of High Octane Components of Motor Fuels
Goncharova, A. V.,Knyazeva, M. I.,Maksimov, A. L.,Ni, D. S.,Ramazanov, D. N.,Samoilov, V. O.
, p. 108 - 117 (2020/03/27)
The possibility of implementing the concept of converting bioglycerin into a blend of oxygenates, potentially applicable as components of gasoline by ketalization with acetone (T = 30°C–40°C, atmospheric pressure), accompanied by mild hydrogenolysis of ketal [T = 100°C–140°C, p(H2) = 2 MPa] to obtain a mixture of of glycerol and solketal isopropyl ethers was demonstrated. Results showed that the preferred method of conversion was the separate performing of ketalization and hydrogenolysis, since when these stages are combined, the side reaction of the formation of free isopropyl alcohol was highly selective. The regularities in the influence of the composition of the catalytic system (Pd/C + para-toluenesulfonic acid) on its activity were observed in the reaction of catalytic hydrogenation of solketal to a mixture of glycerol and solketal isopropyl ethers (optimal ratio of Pd/para-toluenesulfonic acid = 0.811 mol). The addition of 4%–5% glycerol to raw materials increased the yield of target hydrogenation products from 25% to 36%. Using a flow unit, the catalytic hydrogenation of solketal was optimized. In the optimal mode [T = 170°C, p(H2) = 4 MPa, v = 0.5 h?1, H2/feedstock = 660 nL L?1], the conversion of solketal to a mixture of target products (glycerol monoisopropyl ether, glycerol diisopropyl ethers, and solketal isopropyl ether) reached 98%. The possibility of carrying out the reaction on heterogeneous bifunctional catalysts of the Pd/sulfonated coal type was shown.
Glycerol acetal(ketal) ether and synthesis method thereof
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Paragraph 0099; 0103, (2019/10/04)
The invention discloses glycerol acetal(ketal) ether and a synthesis method thereof, and relates to the technical field of chemical industry synthesis. According to the method, two functional groups acetal(ketal) and ether are integrated into one molecule by using glycerol as a raw material, wherein the glycerol acetal(ketal) ether can improve the use efficiency of unit fuel additives; the method comprises two synthesis routes, etherification and acetalization (ketalization) can be sequentially performed, or acetalization (ketalization) and etherification can be sequentially performed, wherein the etherification reaction is an atomic economic reaction; the by-product of the acetalization (ketalization) reaction is only one molecule of water, such that the method is environmentally friendly and efficient; the yield of the glycerol acetal(ketal) ether is high, and can be up to 99%; and the solid acid catalyst is used, is clean and efficient, and can be recycled so as to greatly reduce the cost and achieve the high industrial value.
