Solubilities of oxygen and nitrogen in acetone-water mixed solvent.

Tsuji, Kiyoyuki; Ichikawa, Kenichi; Yamamoto, Hideki; Tokunaga, Junji

doi:10.1252/kakoronbunshu.13.825

Cited by 20 publications

(17 citation statements)

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“…For solubilities of nitrogen and oxygen in the same aqueous acetone solution, this similarity also has been found in the previous works of Tsuji et al (1987) and Yamamoto et al ( 1994).…”

Section: Resultssupporting

confidence: 89%

Solubility of argon in acetone + water mixed solvent at 288.15, 298.15 and 308.15 K

1994

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Solubilities of argon were determined in acetone + water mixed solvent over the full range of composition using a static method. The gas solubilities were measured at three temperatures of 288.15, 298.15 and 308.15 K. The solubility dependence on the temperature in the mixed solvent was measured and discussed, and the similarity between excess quantities of mixed solvent and those of gas solubilities was examined. The order of gas solubility of argon in acetone + water mixed solvent at the three different temperatures was 288. 15 > 298.15 > 308.15 K in the composition range of 0 ≤ x22 ≤ 0.15. However, the reverse relationship with temperature was observed in the range of composition of 0.15 < x2 ≤ 1.0. For all solubility curves, maximum and minimum values of solubility were observed at lower temperatures, but not at higher temperatures. Furthermore, the excess Ostwald coefficients on the basis of volume fraction which express the non‐ideality of gas solubility in non‐ideal solutions were defined, and they were expressed by a polynomial equation of the Redlich‐Kister (1948) type.

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“…For solubilities of nitrogen and oxygen in the same aqueous acetone solution, this similarity also has been found in the previous works of Tsuji et al (1987) and Yamamoto et al ( 1994).…”

Section: Resultssupporting

confidence: 89%

Solubility of argon in acetone + water mixed solvent at 288.15, 298.15 and 308.15 K

1994

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“…methanol, ethanol, propanol and acetone. [51][52][53] It is, therefore, possible to calculate the level of saturation ( f ) that can be achieved by mixing these pure solvents with water at different mole fractions, which is defined as: 54…”

Section: Why Does the Number Density Of Bnbs Reach A Maximum At Certamentioning

confidence: 99%

“…where, X m , X e , X w , X s , n w and n s are, respectively, gas mole fraction obtained when the saturated solvent and water of a given mole fraction are mixed, gas mole fraction in that mixture, 51-53 mole fraction of gas in pure water, mole fraction of gas in pure solvent, mole fraction of water in solvent-water solution and mole fraction of solvent in solvent-water solution. The values of X e for methanol, ethanol, propanol and acetone used in the calculations were obtained from Battino et al 51,52 and Tsuji et al 53 Note, however, that calculations for DMSO and formamide could not be conducted because similar solubility data could not be found. The relevant O 2 and N 2 solubility data for methanol, ethanol, propanol and acetone are plotted in Fig.…”

Section: Why Does the Number Density Of Bnbs Reach A Maximum At Certamentioning

confidence: 99%

Proving and interpreting the spontaneous formation of bulk nanobubbles in aqueous organic solvent solutions: effects of solvent type and content

Jadhav

Barigou

2020

Soft Matter

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We show that the mixing of organic solvents with pure water leads to the spontaneous formation of suspended nano-entities which exhibit long-term stability on the scale of months. A wide range of solvents representing different functional groups are studied: methanol, ethanol, propanol, acetone, DMSO and formamide. We use various physical and chemical analytical techniques to provide compounded evidence that the nano-entities observed in all these aqueous solvent solutions must be gas-filled nanobubbles as they cannot be attributed to solvent nanodroplets, impurities or contamination. The nanobubble suspensions are characterized in terms of their bubble size distribution, bubble number density and zeta potential. The bubble number density achieved is a function of the type of solvent. It increases sharply with solvent content, reaching a maximum at an intermediate solvent concentration, before falling off to zero. We show that, whilst bulk nanobubbles can exist in pure water, they cannot exist in pure organic solvents and they disappear at some organic solvent-water ratio depending on the type of solvent. The gas solubility of the solvent relative to water as well as the molecular structure of the solvent are determining factors in the formation and stability of bulk nanobubbles. These phenomena are discussed and interpreted in the light of the experimental results obtained.

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“…Considering from the chemical shifts and integral values of those peaks, the lowest molecular weight fraction of water‐soluble degraded products for DMG/BD polyester is the mixture of BD and the condensation product of DMG with BD. Tsuji et al16 also reported that the water‐soluble degraded product of poly(hexamethylene adipate) was the condensation product of adipic acid with hexamethylene glycol.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and enzymatic degradation of high molecular weight aliphatic polyesters

Shirahama

Kawaguchi

Aludin

et al. 2001

J. Appl. Polym. Sci.

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The aliphatic polyesters with high molecular weight have been prepared according to two methods. First is the synthesis of the polyesters by polycondensation of dimethyl succinate (DMS) with 1,4‐butanediol (BD) using various metal alkoxides as a catalyst. Among the metal alkoxides used, titanium tetraisopropoxide [Ti(OiPr)4] gave the best results (highest molecular weight and yield). Thus, we have prepared aliphatic polyesters using a variety combinations of diesters [MeOOC—(CH2)x—COOMe, x = 2–8] with BD by the catalysis of Ti(OiPr)4. The polyesters with high number‐average molecular weight (Mn > 35,000), except dimethyl adipate (DMA, x = 4)/BD polyester (Mn = 26,900), were obtained in high yield. The melting temperatures (Tm) of polyesters were relatively low (43.4–66.8°C) except that (115.6°C) of the DMS/BD polyester. Second is the synthesis of high molecular weight polyesters by chain extension reaction of lower molecular weight (Mn = 15,900–26,000) polyesters using hexamethylene diisocyanate (HDI) as a chain extender. The Mn values of chain‐extended polyesters consequently increased more than two times (Mn = 34,700–56,000). The thermal properties of polyesters hardly changed before and after chain extension. Enzymatic degradations of the polyesters were performed using three different enzymes (cholesterol esterase, lipase B, and Rhizopus delemar lipase) before chain extension. The enzymatic degradability varied depending on both thermal properties of polyesters [melting temperature and heat of fusion (crystallinity)] and the substrate specificity of enzymes, but it was the following order: cholesterol esterase > lipase B > R. delemar lipase. The 1H‐NMR spectrum of water‐soluble degraded products of the polyester indicated that the polyester was degraded into a condensation product of diol with diester in a monomer form. The enzymatic degradation of chain extended polyesters was slightly smaller than that before chain extension, but proceeded steadily. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 340–347, 2001

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Solubilities of oxygen and nitrogen in acetone-water mixed solvent.

Cited by 20 publications

References 0 publications

Solubility of argon in acetone + water mixed solvent at 288.15, 298.15 and 308.15 K

Solubility of argon in acetone + water mixed solvent at 288.15, 298.15 and 308.15 K

Proving and interpreting the spontaneous formation of bulk nanobubbles in aqueous organic solvent solutions: effects of solvent type and content

Synthesis and enzymatic degradation of high molecular weight aliphatic polyesters

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