Journal
JOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume 66, Issue 5, Pages 2143-2152Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jced.1c00052
Keywords
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Funding
- European Horizon 2020 research grant [768573]
- Technical University of Denmark (Danmarks Tekniske Universitet, DTU), Department of Chemical and Biochemical Engineering
- H2020 Societal Challenges Programme [768573] Funding Source: H2020 Societal Challenges Programme
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The solubility of disodium terephthalate in aqueous sodium hydroxide and in aqueous sodium hydroxide-ethylene glycol mixtures was experimentally determined, and its phase diagrams were established from -25 to 70 degrees C. The solubility of disodium terephthalate shows no significant dependence on temperature, while its freezing points vary with composition. The solubility and freezing points decrease with increasing concentrations of ethylene glycol, and disodium terephthalate is salted out by the addition of sodium hydroxide.
The solubility of disodium terephthalate in aqueous sodium hydroxide and in aqueous sodium hydroxide-ethylene glycol mixtures was determined experimentally by temperature analysis, gravimetry and titration. The experimental results were compared with existing literature data and the phase diagrams were determined from -25 to 70 degrees C. The solubility of disodium terephthalate has no considerable dependence on temperature. The freezing points of disodium terephthalate solutions vary with composition like any other solution. The solubility and freezing points decrease with increasing concentrations of ethylene glycol. Disodium terephthalate is salted out by the addition of sodium hydroxide.
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