Effect of addition of different antisolvents on the crystallization of aqueous ammonium dihydrogen phosphate solutions
Artykuł w czasopiśmie
MNiSW
20
Lista A
| Status: | |
| Autorzy: | Sangwal Keshra, Mielniczek-Brzóska Ewa |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2017 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 8 |
| Wolumen/Tom: | 52 |
| Strony: | 1600361 - 1600369 |
| Impact Factor: | 1,122 |
| Web of Science® Times Cited: | 9 |
| Scopus® Cytowania: | 9 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The effect of addition of three different antisolvents (namely: methanol, ethanol and acetone) on the metastable zone width (MSZW) for the crystallization of ammonium dihydrogen phosphate (ADP) from their aqueous solutions saturated at 30°C is studied by in situ measurements of solution temperature T as a function of feeding time t of the antisolvents at preselected rate RA. It is found that the value of MSZW, as determined by the value of the maximum antisolvent content Δxmax, for a given RA decreases with decreasing dielectric constant εa of the antisolvent. The experimental Δxmax(RA) data for different antisolvents are analyzed by using two dependences: lnΔxmax) = Φ + (1/m)lnRA) and (Δxmax)−2 = F(1−ZlnRA), with constants Φ, m, Z and F, predicted by self-consistent Nývlt-like approach and an approach based on the classical three-dimensional nucleation theory, respectively. Analysis of the Δxmax(RA) data revealed that: (1) the empirical constants Φ and m increase linearly with εa−1 of the antisolvents, and (2) Φ = −lnF/2 and m = −2/Z. The observations are discussed from consideration of solute−solvent and solute−antisolvent interactions. The results show that the parameter FZ for different antisolvents provides information of solute−solvent interfacial energy γ and diffusion processes. |
