Beziehungen zwischen Oberflächenspannung und Löslichkeit

Direct Observation of Single Ostwald Ripening Processes by Molecular Dynamics Simulation

“…His work is the first quantitative proof of the influence of surface energy on the equilibrium. Later Hulett confirmed Ostwald’s results with other substances . Hulett also discussed the well-known experience that freshly precipitated solids may pass through a regular filter while after some time they do not which is a consequence of ripening.…”

“…Later Hulett confirmed Ostwald's results with other substances. 2 Hulett also discussed the well-known experience that freshly precipitated solids may pass through a regular filter while after some time they do not which is a consequence of ripening. To be able to separate the solid directly after precipitation one uses hot solutions.…”

Coprecipitation with Barium Sulfate.

“…An important consideration affecting von Weimarn's conclusions regarding particle size is the ratio Sr/S. Hulett (7) showed that fine subdivision of barium sulfate increased the solubility, and Kolthoff this ratio for various substances. This increased solubility of small crystals is the explanation usually given for the beneficial effects of digestion.…”

Contact nucleation of magnesium sulfate heptahydrate in a continuous MSMPR crystallizer

“…Buckley (6, p. 23) reported that Hulett (23,24) was among the first to investigate the effect of particle size on solubility. By using fine i^owders of barium sulfate, mercuric oxide, and gypsum, he was able to produce temporary concentra tions well in excess of the normal solubility.…”

“…Carey and Bosanquet ( 7) as cited by Johnson reported in a study of coal crushing that the energy required and the fracture pattern which resulted were the same regardless of whether the energy was applied by impact, pressure or a combina tion of sliding contact and pressure. Johnson (25, p. 102) reports: "There is no reason to believe that the same obser- Consequently, the nucleation as a result of a crystal/solid k^ contact was simply inferred in the term (Re ) of equation s (23). There was no way of determining the number of nuclei produced per contact for a given energy of contact because not only were the number of crystal/solid impacts unknown, but so was the energy associated with each contact.…”