Antisolvent crystallization of aqueous ammonium dihydrogen phosphate solutions by addition of acetone at different rates
PBN-AR
Instytucja
Wydział Mechaniczny (Politechnika Lubelska)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
CRYSTAL RESEARCH AND TECHNOLOGY
ISSN
0232-1300
EISSN
Wydawca
DOI
URL
Rok publikacji
2016
Numer zeszytu
8
Strony od-do
475-490
Numer tomu
51
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 2)
Pozostali autorzy
+ 1
Streszczenia
Język
EN
Treść
Results of an investigation of in situ measurements of laser-beam intensity Is and Im transmitted through aqueous ammonium dihydrogen phosphate (ADP) solutions saturated at 30 °C and water, respectively, and temperature Ts of solution and Tm of water during feeding of antisolvent acetone at different rates RA, using an indigenously designed experimental setup, are presented and discussed. It was found that: (1) for the measurement of MSZW, defined as the maximum volume fraction of acetone content Δxmax in the solution, obtained from temperature measurements are more reliable than transmitted laser-beam intensity measurements for solutions, (2) two minima ΔTmin1 and ΔTmin2 associated with endothermic reactions, separated by a maximum ΔTmax due to exothermic reactions appear in the plots of temperature difference ΔT = Ts−Tm against acetone feeding time t, and (3) in the ΔT(t) plots there are time intervals Δt of constant rates RT of increase in ΔT of aqueous ADP solutions, and these values of RT increase linearly with acetone feeding time rate RA. The experimental data on the observed dependence of MSZW on antisolvent feeding rate RA, the appearance of minima ΔTmin1 and ΔTmin2 and maximum ΔTmax and their dependence on RA, and the relationship between RT and RA are discussed from consideration of processes of nucleation and growth of crystallites.
Inne
System-identifier
19990
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