Kuljiraseth, J.; Wangriya, A.; Malones, J. M. C.; Klysubun, W.; Jitkarnka, S. published the artcile< Synthesis and characterization of AMO LDH-derived mixed oxides with various Mg/Al ratios as acid-basic catalysts for esterification of benzoic acid with 2-ethylhexanol>, SDS of cas: 104-76-7, the main research area is aqueous miscible organic solvent layered double hydroxide esterification; acid base property.
Proven to possess distinguishable phys. and acid-base properties superior to conventional LDHs, aqueous miscible organic solvent-layered double hydroxides (AMO-LDHs) were thus synthesized and used as precursors to prepare the Mg/Al mixed oxide catalysts in this work. The AMO-LDH based oxide catalysts with various ratios of Mg/Al were studied for the chem. and phys. properties and the activity on esterification of benzoic acid with 2-ethylhexanol. The catalysts were characterized using BET, XRD, TGA, and XPS. Moreover, the acid-base properties were studied. As a result, the Mg/Al mixed oxides after calcination at 500 °C still had the clay structure, and were found to possess both acid and base sites. As the Mg/Al ratio increased, the total d. of acid and basic sites decreased. Moreover, the acid-basic strength depended on their phase compositions and coordination number The activity of calcined LDHs catalysts was tested for the esterification of benzoic acid with 2-ethylhexanol, aimed at producing 2-ethylhexyl benzoate as the desired chem. The products were analyzed using GC-MS/TOF. In summary, the conversion of benzoic acid was enhanced significantly using the Mg-Al mixed oxides as the catalysts, owing to the acid-base sites (both Mg2+-O2- and Al3+-O2- pairs) of the catalysts. The catalyst with the Mg/Al ratio of 4:1 can convert 66% benzoic acid to 2-ethylhexyl benzoate. Moreover, the other products were composed of 2-ethylhexanal, 3-heptanone, and 3-heptanol because of acid-base pairs.
Applied Catalysis, B: Environmental published new progress about Acidity. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, SDS of cas: 104-76-7.
Referemce:
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