Purification of monoethylene glycol by melt crystallization

Ila, M.; Louhi-Kultanen, Marjatta

doi:10.1016/j.ces.2023.118601

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Crystal fabrication processes are divided into dry processes such as vacuum deposition [15–17] and molecular epitaxy [18–20] techniques, and wet processes such as melt, [21–23] flux, [24–27] and solution [28–31] techniques. Solution processes have the advantages of enabling low‐temperature and atmospheric fabrication of crystals.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to these, the positions at which the crystals are formed are important for combining crystals [11,12] and integrating crystal devices. [13,14] Crystal fabrication processes are divided into dry processes such as vacuum deposition [15][16][17] and molecular epitaxy [18][19][20] techniques, and wet processes such as melt, [21][22][23] flux, [24][25][26][27] and solution [28][29][30][31] techniques. Solution processes have the advantages of enabling low-temperature and atmospheric fabrication of crystals.…”

Section: Introductionmentioning

confidence: 99%

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Phase Diagrams of Anthracene Derivatives in Pyridinium Ionic Liquids

Watanabe,

Ono,

Nakayama

et al. 2024

ChemPhysChem

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Crystal engineering of π‐conjugated molecules has attracted much attention because of their electronic, photonic, and mechanical properties. However, reproducibility is a problem in conventional printing techniques because controlling solvent evaporation is difficult. We investigated the phase diagrams of two anthracene derivatives in synthesized ionic liquids for non‐volatile crystal engineering to determine the critical points for nucleation and crystal growth. Anthracene and 9,10‐dibromoanthracene were used as representative π‐conjugated molecules that form crystal structures with different packing types. Ionic liquids with an alkylpyridinium cation and bis(fluorosulfonyl)imide were good solvents for the anthracene derivatives from ca. 0 °C to 200 °C. The solubilities (critical points for crystal growth) of the anthracene derivatives in the ionic liquids reached the 100 mM level, which is similar to those in organic solvents. Ionic liquids with phenyl and octyl groups tended to show high‐temperature dependence (a high dissolution entropy) with 9,10‐dibromoanthracene. The precipitation temperature (critical point for crystal nucleation) at each 9,10‐dibromoanthracene concentration was lower than the dissolution temperature. The differences between the dissolution and precipitation temperatures (supersaturated region) in the ionic liquids were greater than those in an organic solvent.

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