Autor: Shiomori, K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Extraction equilibria of hypophosphorous, phosphorous and phosphoric acids by toluene solution of tri-n-octylamine
Autorzy:: Sana, T.
Shiomori, K.
Kawano, Y.
Powiązania:: https://bibliotekanauki.pl/articles/347049.pdf
Data publikacji:: 2003
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:: hypophosphorous acid
phosphorous acid
phosphoric acid
tri-n-octylamine
extraction equilibrium
Opis:: The extraction equilibria of hypophosphorous, phosphorous and phosphoric acids with tri-n-octylamine as an extractant in toluene were measured at 303K. Under these conditions, undissociated acid (A’) reacts with the amine (B) to form various complexes in toluene. The complexes formed and equilibrium constants were estimated by a graphical analysis method. The complexes formed in these systems were found to be A’nB type species for hypophosphorous acid, A’nBm type species for phosphorous acid, (A'B)n type species for phosphoric acid, respectively. The experimental results could be explained by reaction models and equilibrium constants for each acid.
Źródło:: Ars Separatoria Acta; 2003, 2; 125-138
1731-6340
Pojawia się w:: Ars Separatoria Acta
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Preparation of effective and fast extraction media for palladium (II) using microcapsules
Autorzy:: Minamihata, K.
Kiyoyama, S.
Shiomori, K.
Yoshida, M.
Hatate, Y.
Powiązania:: https://bibliotekanauki.pl/articles/346981.pdf
Data publikacji:: 2007
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:: palladium
extraction
microcapsule
tri-n-octylamine
Opis:: Microcapsules containing tri-n-octylamine as an extractant with the diameter of less than 25µm were prepared by using SPG membrane emulsification and insitu polymerization method. The morphologies of microcapsules, the encapsulation efficiencies of tri-n-octylamine, the extraction properties of palladium (II) from hydrochloric acid solution and the back extraction properties of palladium (II) from microcapsules were investigated. The average diameter of obtained microcapsules was about half of the pore diameter of SPG membrane. The encapsulation efficiency of tri-n-octylamine was approximately 100% for all the microcapsules prepared in this study. Therefore, it can be said that there was practically no loss of tri-n-octylamine during the preparation of microcapsules. All microcapsules prepared in this study reached forward extraction equilibrium within 5 minutes and the forward extraction ratio reached nearly 1. The back extraction of palladium (II) from microcapsules was carried out using 0.1M-hydrochloric acid solution containing a prescribed amount of thiourea. The back extraction occurred promptly and the back extraction ratio was high enough to elute all palladium (II) out from the microcapsules. Furthermore, by repeating forward and back extraction experiments, the durability of microcapsules was examined. From the result, it can be said that tri-n-octylamine was encapsulated rigidly and there was no leakage during extraction and back extraction experiment. Thus it seemed that the microcapsules were capable to be used in a repeated operation.
Źródło:: Ars Separatoria Acta; 2007, 5; 55-67
1731-6340
Pojawia się w:: Ars Separatoria Acta
Dostawca treści:: Biblioteka Nauki

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