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1

Solubility equilibrium in ternary systems: vanadium(V) oxide - alkali metal salts - water

Trypuć M., Chałat M., Mazurek K.

Polish Journal of Chemical Technology

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2005

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Vol. 7, nr 2

72-79

EN

This paper presents an approximation of the experimental data on the mutual components solubility for four ternary systems: K2SO4 - V2O5 - H2O, Na2SO4 - V2O5 - H2O, KCl - V2O5 - H2O, NaCl - V2O5 - H2O at the temperature range 293÷323 K, with the use of mathematical functions.

2

Solubility investigations in the K2SO4 + V2O5 + H2O system from 293 K to 323 K

Trypuć M., Chałat M., Mazurek K.

Polish Journal of Applied Chemistry

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2003

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Vol. 47, nr 4

287-293

EN

The mutual solubility of K2SO4 and V2O5 in water within temperature range of 293 K to 323 K was investigated employing the isothermal solution saturation method. The concentration of vanadium ions (V) was calculated using the spectrophotometric method with 4-(2-pirydylazo)-resorcinol agent while the potassium ion concentration was evaluated using the balance method in the form of K[[B(C6H5)4]. These results were used to plot a part of the polythermal section of the K2SO4 + V2O5 + H2O system .The data ere essential in determination of the optimum processing parameters to recover V2O5 from the used vanadium catalyst in the oxidation SO2 to SO3

PL

Rozpuszczalność K2SO4 oraz V2O5 w wodzie, zakresie temperatur 293 - 323 K, zbadano metodą izotermicznego nasycania roztworów. Stężenie jonów wanadanowych oznaczano spektrofotometrycznie przy użyciu 4-(2-pirydyloazo)-rezorcynolu, natomiast stężenie jonów potasowych metodą wagową w postaci K[B(C6H5)4]. Na podstawie uzyskanych wyników wykreślono wycinek politermy układu K2SO4 + V2O5 + H2O. Dane te są potrzebne do określenia optymalnych warunków wydzielenia V2O5 ze zużytego katalizatora wanadanowego po procesie utleniania SO2 do SO3.

3

Solubility investigations in the KCl + V2O5 +H2O system from 293 K to 323 K

Trypuć M., Chałat M., Mazurek K.

Polish Journal of Applied Chemistry

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2002

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Vol. 46, nr 2

135-141

EN

The mutual solubility of KCl and V2O5 in water within temperature range of 293 to 323 K was reported. These results were used to plot a part of the polythermal solubility surface for the KCl + V2O5 + H2O system. The data are essential in determination of the optimum operating parameters for the potassium metavanadate production process based on KCl and V2O5 in the presence of steam or oxygen.

4

Synthesis of KVO3 from KC1 and V2O5 in presence of oxygen

Trypuć M., Białowież K., Kiełkowska U., Torski Z., Mazurek K.

Polish Journal of Chemical Technology

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2001

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Vol. 3, nr 1

33-34

EN

Investigation was carried out on the optimization conditions of the synthesis of KVO3 and Cl2 from KC1 and V2O5 in the presence of atmospheric oxygen. The research was performed in temperature range 673 - 873 K, for 1 to 7 hours time duration. These data are essential for the evaluation of a new, non - waste production method of potassium carbonate.

5

Investigations on the influence of silicon dioxide introduced as a neutral carrier into the reaction mixture on V2O5 conversion into KVO3

Trypuć M., Torski Z., Białowież K.

Polish Journal of Chemical Technology

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2001

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Vol. 3, nr 1

28-32

EN

Exfoliated graphite (EG) produced on an industrial scale found a new application such as a sorbent for the removal of heavy oils from water. Some investigations of the oil sorption on EG were performed with very satisfactory results. In this paper two methods of EG preparations will be discussed to consider the quality of the obtained product for an oil sorbent application and the influence the way of EG production on the environment.