Autor: Grela, D. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effects of processing parameters on hydrolysis of TiOSO4
Autorzy:: Grzmil, B.
Grela, D.
Kic, B.
Powiązania:: https://bibliotekanauki.pl/articles/778719.pdf
Data publikacji:: 2009
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: dwutlenek tytanu
hydroliza
siarczan tytanylu
hydrate titanium dioxide
hydrolysis
titanyl sulfate
Opis:: The influence of both TiOSO4 concentrations in the starting solution and a way of conducting hydrolysis on the degree of titanyl sulphate conversion to hydrated titanium dioxide were studied. Titanyl sulphate solution, an intermediate product in the commercial preparation of titanium dioxide pigments by sulphate method, was used. The continuous method of conducting hydrolysis was applied using one or two reactors connected in series. It was found that the degree of hydrolysis markedly depends on the studied parameters. It was also found that TiOSO4 hydrolysis using the continuous method should be conducted: i) at a possibly low concentration of free sulfuric acid in the solution and; ii) in two or more rectors connected in series.
Źródło:: Polish Journal of Chemical Technology; 2009, 11, 3; 15-21
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The influence of admixtures on the course of hydrolysis of titanyl sulfate
Autorzy:: Grzmil, B.
Grela, D.
Kic, B.
Podsiadły, M.
Powiązania:: https://bibliotekanauki.pl/articles/779042.pdf
Data publikacji:: 2008
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: dwutlenek tytanu
hydroliza
hydrate titanium dioxide
hydrolysis
titanyl sulfate
admixtures
Opis:: The study focused on the question how admixtures, such as iron(II), iron(III), magnesium and aluminium salts influence the degree of TiOSO4 conversion to hydrated titanium dioxide (HTD). Titanyl sulfate solution, an intermediate product in the industrial preparation of titanium dioxide pigments by sulfate route was used. The admixtures were added to the solution and their concentration was gradually changed. It was found that hydrolysis clearly depended on Fe(II) and Fe(III) concentrations. The higher the concentration of iron(II) (up to 5 wt %) in the solution was, the higher conversion degree was achieved. A reverse relationship was observed concerning the influence of iron(III) introduced up to 1.5 wt %. The constant rates of both phases of titanyl sulfate hydrolysis (including the formation of an intermediate colloidal TiO2 and final products) depended on iron(II) and iron(III) content in the solution. The concentration of other constituents did not influence hydrolysis in the investigated part of the process (up to 2.6 wt % of Mg and up to 0.3 wt % of Al). However, the size of primary particles of the obtained TiO2źnH2O did not depend on the content of the above-mentioned constituents in the solution.
Źródło:: Polish Journal of Chemical Technology; 2008, 10, 3; 4-12
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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