Structural investigation on sodium-2-keto-l-gulonate-monohydrate

Dette, Severine S.; Sanselme, Morgane; Stelzer, Torsten; Renou, Ludovic; Jones, Matthew; Couvrat, Nicolas; Coquerel, Gérard; Ulrich, Joachim

doi:10.1016/j.molstruc.2012.03.062

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Furthermore, in a previous work of our group, the solid-liquid phase diagrams in the system HKGA + NaKGA + water were studied at temperatures in the range 275 -313 K and ambient pressure [10]. It was found that both HKGA and NaKGA crystallize exclusively as monohydrates HKGA • H 2 O and NaKGA • H 2 O, respectively, at the studied conditions, which is in line with other reports in the literature [4,5,17].…”

Section: Introductionsupporting

confidence: 87%

Solid-liquid equilibrium in the system 2-keto-L-gulonic acid + sodium-2-keto-L-gulonate + hydrochloric acid + sodium chloride + water

Jirasek

Steimers

Burger

et al. 2019

Fluid Phase Equilibria

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The reactive solid-liquid equilibrium (SLE) in the quinary system 2-keto-L-gulonic acid (HKGA) + sodium-2-keto-L-gulonate (NaKGA) + hydrochloric acid (HCl) + sodium chloride (NaCl) + water was studied experimentally at 298 K and ambient pressure. The precipitation of three solid species was observed: HKGA monohydrate (HKGA • H 2 O), NaKGA monohydrate (NaKGA • H 2 O), and NaCl. A thermodynamic model based on the Pitzer model to calculate the activity coefficients in the liquid phase for the SLE was developed and unreported Pitzer parameters were fitted to the experimental data of this work. The equilibrium constant for the dissociation of HKGA and the solubility products of HKGA • H 2 O and NaKGA • H 2 O at 298 K were calculated from experimental data, whereas the equilibrium constant for the autoprotolysis of water and the solubility product of NaCl were adopted from literature data. The agreement between the experimental data and the results from the model is excellent, both regarding the liquid phase composition and the solid species in solid-liquid equilibrium.

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Section: Introductionsupporting

confidence: 87%

Solid-liquid equilibrium in the system 2-keto-L-gulonic acid + sodium-2-keto-L-gulonate + hydrochloric acid + sodium chloride + water

Jirasek

Steimers

Burger

et al. 2019

Fluid Phase Equilibria

View full text Add to dashboard Cite

show abstract

“…Under the assumption that both crystal species HKGA and NaKGA are only present as monohydrates according to the literature (cf. [7,8,13]), three cases were distinguished: if no Na + is found, the solid is only HKGA • H 2 O; if the same amount of Na + and KGAis found, the solid is only NaKGA • H 2 O; if more KGAthan Na + is found, the solid contains both species. The concentration of hydrate water in the solid phase was calculated from mass balances confirming the exclusive presence of the monohydrate forms of both solids.…”

Section: Methodsmentioning

confidence: 99%

“…In the presence of sodium ions at neutral conditions, the sodium salt of HKGA sodium-2-keto-L-gulonate (NaKGA) can precipitate from aqueous solutions. Thereby, also NaKGA precipitates as monohydrate NaKGA • H 2 O at ambient pressure [7,13]. Literature on the solubilities of HKGA and NaKGA in water is scarce.…”

Section: Introductionmentioning

confidence: 99%

Solid-liquid equilibrium in the system 2-keto-L-gulonic acid + sodium-2-keto-L-gulonate + water

Jirasek

Burger

Hasse

2018

Fluid Phase Equilibria

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The solid-liquid equilibrium (SLE) in the ternary system 2-keto-L-gulonic acid (HKGA) + sodium-2-keto-L-gulonate (NaKGA) + water was studied experimentally at temperatures between 275 and 313 K and ambient pressure. At these conditions, HKGA and NaKGA precipitate as monohydrates:and NaKGA • H 2 O, respectively. Phase diagrams with one eutonic point are found for all temperatures. A thermodynamic model of the SLE that is based on an extended version of the Debye-Hückel theory was developed and the dissociation constant of HKGA as well as the solubility products of HKGA • H 2 O and NaKGA • H 2 O were determined. The agreement between the experimental data and the results from the model is excellent.

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Structural investigation on sodium-2-keto-l-gulonate-monohydrate

Cited by 2 publications

References 8 publications

Solid-liquid equilibrium in the system 2-keto-L-gulonic acid + sodium-2-keto-L-gulonate + hydrochloric acid + sodium chloride + water

Solid-liquid equilibrium in the system 2-keto-L-gulonic acid + sodium-2-keto-L-gulonate + hydrochloric acid + sodium chloride + water

Solid-liquid equilibrium in the system 2-keto-L-gulonic acid + sodium-2-keto-L-gulonate + water

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