Ethanolamines and Propanolamines

Densities, Viscosities of Pure 1-(2-Hydroxyethyl) Pyrrolidine, 3-Amino-1-Propanol, Water, and Their Mixtures at 293.15 to 363.15 K and Atmospheric Pressure

“…For blends of the two amines, the V E show low negative values with a clear trend at lower temperatures ( T ≤ 303 K) but larger scatter at higher temperatures ( T > 303 K). 1-(2HE)­PRLD has cyclic pyrrolidine and hydroxyethyl (-C 2 H 5 O) groups and 3A1P has an aminopropanol group . It may be the consequence of the mixture being favorable for geometric filling due to steric hindrances at lower temperatures but then to be an unfavorable structural geometric at higher temperatures due to molecular motion (Figure c).…”

“…The negative V E indicates a volume contraction in the real mixture, which can be attributed to the chemical and structural characteristic 26 and 3A1P has an aminopropanol group. 27 It may be the consequence of the mixture being favorable for geometric filling due to steric hindrances at lower temperatures but then to be an unfavorable structural geometric at higher temperatures due to molecular motion (Figure 3c). The two binary aqueous solutions show the largest negative V E values, indicating the most efficient packing 28 in the system, but for blends of the two amines, the deviations were smaller.…”

Critical Assessment of the Sustainability of Deep Eutectic Solvents: A Case Study on Six Choline Chloride-Based Mixtures

“…The HBA salt of choline chloride (ChCl) is already a significant example in this regard, since it is produced through the reaction of trimethylamine, hydrochloric acid, and ethylene oxide (represented in Figure ). , Among the building blocks used in the chemical process, trimethylamine is produced from methanol and ammonia, which are actually derived from fossil sources, and the synthesis of ammonia is also particularly energy demanding; ethylene oxide comes from a renowned petrochemical derivative, ethylene, but its synthesis from ethanol (and thus from renewable bioethanol) has also been proposed, as well as its replacement with glycolaldehyde . It should be pointed out that choline could theoretically be isolated from the different bioavailable sources (such as animal wastes, legumes...); yet, as far as we are aware, there are not scientific studies nor industrial processes dealing with its sustainable and/or cost-effective extraction.…”

Detecting Early-Stage Intermediates of Free-Radical Oxidative Degradation in Charged Aqueous Microdroplets

“…Small organic molecules with amine functional groups are used in various industrial applications; for example, 2-aminoethanol (monoethanolamine, MEA) for gas scrubbing 30 and in the cosmetic industry as a buffer for pH regulation and for preparing emulsions. 31 Unfortunately, these chemicals eventually pollute the environment. As a result, there is considerable interest in studying the degradation of these chemicals.…”

“…In the present work, we studied the degradation of organic amines in aqueous microdroplets. Small organic molecules with amine functional groups are used in various industrial applications; for example, 2-aminoethanol (monoethanolamine, MEA) for gas scrubbing and in the cosmetic industry as a buffer for pH regulation and for preparing emulsions . Unfortunately, these chemicals eventually pollute the environment.…”