How much solvent of acetone is used in solubility?5 answersThe amount of acetone solvent used in solubility studies varies depending on the specific research. In the context of lithium bromide solubility, mixed solvents of acetone-water with mass ratios ranging from 10% to 40% water were utilized for measurements. Similarly, in the study of glycine solubility, acetone-water mixed solvents were employed, with the quantity ratio of acetone and water affecting the solubility of glycine. Additionally, the solubility of carbon dioxide was investigated in pure liquid acetone and acetone-water mixtures at different acetone mole fractions. Furthermore, the solubility of genistin was examined in binary solvent mixtures of ethanol-water and acetone-water with varying initial mole fractions. Therefore, the amount of acetone solvent used in solubility experiments is determined by the specific requirements of each study, ranging from pure acetone to various acetone-water mixtures.
Which solvent can i use for 2,3-butanediol extraction from fermentation broth?5 answersThe solvent that can be used for 2,3-butanediol extraction from fermentation broth is hexane. Hexane-based microemulsion resulted in an organic phase containing a higher concentration of butanol compared to other alkanes such as pentane and heptane. The hexane-based microemulsion had a butanol concentration of 62% w/w. This solvent was found to be a better extractant for 2,3-butanediol compared to the other alkanes tested.
Is methanol suitable solvent for propolis?5 answersMethanol is not mentioned as a suitable solvent for propolis extraction in the provided abstracts. However, other solvents such as ethanol, lactic acid, water, and supercritical CO2 were mentioned for propolis extraction. The studies focused on comparing the content of phenolic compounds, antioxidant activity, and bioaccessibility of propolis extracts using different solvents. Ethanol and lactic acid were found to be effective solvents for propolis extraction, with lactic acid showing similar phenolic compound content and higher antioxidant activity compared to ethanol. The extracts obtained using ethanol at concentrations of 60% to 80% showed strong inhibition of microbial growth, antioxidant activity, and hyaluronidase activity. However, the suitability of methanol as a solvent for propolis extraction was not specifically addressed in the provided abstracts.
Why ethanol is used as a solvent?3 answersEthanol is used as a solvent for various reasons. Firstly, it has been found to have comparable or better extraction efficiency than conventional solvents when used in processes such as oil extractionand producing chromium benzoic acid complexes. Secondly, ethanol has a low freezing point, which makes it suitable for use in zinc-ion capacitors operating at ultralow temperatures. Additionally, ethanol has been shown to favor thermodynamically the synthesis of ethanol in CO2 hydrogenation reactions. Lastly, ethanol has been used as a solvent in the extraction of Brazil nut oil, where it has been found to increase the yield and optimize the use of non-timber forest products.
How does the IR spectrum of methanol and water mixtures change with the composition of the mixture?5 answersThe IR spectrum of methanol and water mixtures undergoes changes in frequency and intensity with the composition of the mixture. The first overtones of the CH3 asymmetric stretching modes of methanol show a downward shift with an increase in methanol concentration. This shift indicates a direct interaction between the CH3 group of methanol and the OH group of water. Similar shifts are observed in water-ethanol and water-1-propanol mixtures, although they are smaller in magnitude. Near-IR spectroscopy can be used to investigate these interactions, providing novel potential for studying interactions involving a C-H bond. Additionally, near-IR spectroscopy can accurately predict the concentrations of methanol and water in mixtures, as well as various physical and chemical properties such as density, refractive index, viscosity, freezing point depression, and osmolality.
Why methanol is not a good solvent extract?4 answersMethanol is not a good solvent for extraction due to its toxicity and high solvent loss. Despite its versatility and use in various applications, the toxicity of methanol poses a risk to human health and the environment. Additionally, methanol exhibits high solvent loss, especially at low temperatures, which can be problematic in certain extraction processes. As a result, there have been efforts to find more eco-friendly solvents for extraction, as the efficacy of methanol has not been fully achieved. Alternative solvents have been explored, such as mixed solvents like methanol/tetrahydrofuran (THF), which have shown higher extraction yields compared to methanol alone. Overall, the toxicity and high solvent loss of methanol make it less desirable as a solvent for extraction, leading to the search for greener and more efficient alternatives.