Abstract
In this work, novel deep eutectic solvent (DES) was prepared from the choline chloride as a hydrogen-bond acceptor in combination with organic acids (i.e., phthalic acid, 2,2-dimethylol propionic acid, glutamic acid, tartaric acid) as a hydrogen-bond donor. Only at the preparation temperature of 110 °C, two novel of DESs were prepared: choline chloride:2,2-dimethylol propionic acid with molar ratios of 1:0.67 and the choline chloride:tartaric acid at a 1:0.5 molar ratio. The thermal stability of DESs was studied. DESs choline chloride:2,2-dimethylol propionic acid (1:0.67) and choline chloride:tartaric acid (1:0.5) were found stable at temperatures lower than 211 and 195 °C respectively. The solubility of metal oxides (MOs) ZnO, Fe2O3, Fe3O4, and V2O5 was determined in choline chloride:2,2-dimethylol propionic acid (1:0.67) and choline chloride: tartaric acid (1:0.5). The obtained MOs solubility values indicated these novel DESs with the interesting ability to dissolve the selected MOs.KeywordsDeep eutectic solventMetal oxide solubilityCholine chlorideOrganic acid
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