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Simultaneous Hydrolysis of Ellagitannins and Extraction of Ellagic Acid from Defatted Raspberry Seeds Using Natural Deep Eutectic Solvents (NADES)

“…As it was mentioned, the Määttä–Riihinen et al method [ 22 ] was selected as theoretical, and the authors used 85 °C for hydrolysis; thus, the same temperature was set as the upper limit in our study. However, considering that EA is stable up to ~200 °C [ 9 ], citric acid up to ~200 °C [ 32 ], and anhydrous betaine up to ~245 °C [ 33 ], it is more than obvious that temperatures higher than 85 °C would lead to the higher conversion rate of EGTs to EA ( Figure S3g,h; Figure S3j,k ), but comparison to theoretical method is more straightforward with the selected experimental domain. Such an outcome is rather expected as high temperatures are required for complete hydrolysis of EGTs to EA [ 9 ].…”

Ionometallurgical Step‐Electrodeposition of Zinc and Lead and its Application in a Cycling‐Stable High‐Voltage Zinc‐Graphite Battery

“…This corresponds essentially to the reported thermal stability of pure betaine, which begins to decompose at ≈250 °C following two different degradation pathways. [ 63 ] Nonetheless, this temperature is 85 degrees above the temperature applied for the dissolution of the metal oxide and 170 degrees above the highest temperature used in the electrodeposition experiments. Hence, the thermal stability of the pure IL seems to be sufficient.…”

Choline chloride–ethylene glycol based deep-eutectic solvents as lixiviants for cobalt recovery from lithium-ion battery cathode materials: are these solvents really green in high-temperature processes?

“…Suuronen et al studied the thermal decomposition of betaine and confirmed that first significant degradation reactions start around 245 °C. 48 Since both betaine and betaine aldehyde have boiling points above 180 °C, no gas-phase FT-IR spectra were investigated. 45 Rhee et al used a derivatization method to detect betaine in the presence of choline chloride by LC-MS using a UV-detector.…”