A Study of Chemical Reactions in Molten Sodium-Potassium Hydrogen Sulfate Eutectic. II. The Reactions of Metal Oxides

1979 ◽  
Vol 32 (11) ◽  
pp. 2555 ◽  
Author(s):  
BJ Meehan ◽  
SA Tariq
Keyword(s):  
Sulfur Dioxide ◽  
Metal Oxides ◽  
Chemical Reactions ◽  
Hydrogen Sulfate ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Potassium Hydrogen

The reactions of sixteen metal oxides with molten sodium-potassium hydrogen sulfate eutectic were studied. It was found that Ag2O, MgO, ZnO, COO, NiO, CuO, Al2O3, Fe2O3 and V2O5 reacted with the melt to produce their respective melt-soluble cations, sulfate and water, while CaO, BaO, Cr2O3 and SnO2 reacted to form insoluble metal sulfates and water. Whereas manganese(IV) oxide reacted with the melt to produce manganese(III) sulfate, water and oxygen, tin(IV) oxide reacted to form tin(IV) sulfate, water and sulfur dioxide. The stoichiometries of these reactions have been determined.

A study of chemical reactions in molten sodium-potassium hydrogen sulfate eutectic. III. The reactions of anions

1980 ◽  
Vol 33 (3) ◽  
pp. 647 ◽  
Author(s):  
BJ Meehan ◽  
SA Tariq
Keyword(s):  
Chemical Reactions ◽  
Inorganic Anions ◽  
Hydrogen Sulfate ◽  
Reaction Products ◽  
Potassium Salts ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Potassium Hydrogen

The reactions of 11 inorganic anions added as their sodium or potassium salts to molten sodium-potassium hydrogen sulfate eutectic were studied and their stoichiometries elucidated. It was found that Na2CO3, NaNO2, KNO3, Na2SO3 and Na2S2O3 reacted with the melt to form water and CO2, NO+NO2, NO2+O2, SO2, S6+SO2 respectively. NaCl, KBr produced HCl and HBr while KI reaction products consisted of I2, SO2 and H2O; K2CrO4 and K2Cr2O7 were converted into H2CrO4 and H2Cr2O7 respectively. These acids decomposed to H2O, O2 and Cr2O3 which reacted further with the melt to produce H2O and Cr2(SO4)2,H2O. K2S2O8 was found to decompose thermally to O2 and K2S2O7 without reacting with the melt.

A Study of Chemical Reactions in Molten Sodium Hydrogen Sulfate Potassium Hydrogen Sulfate Eutectic. V. The Reactions of Eleven Acetates

1994 ◽  
Vol 47 (3) ◽  
pp. 571
Author(s):  
N Mohamed ◽  
SA Tariq
Keyword(s):  
Volatile Product ◽  
Hydrogen Sulfate ◽  
X Ray Diffraction ◽  
Sodium Potassium ◽  
Mass Spectral ◽  
Molten Sodium ◽  
Sodium Hydrogen ◽  
Potassium Hydrogen ◽  
Infrared Methods ◽  
Potassium Magnesium

The reactions of the acetates of lithium, sodium, potassium, magnesium, calcium, strontium, barium, manganese, cobalt, zinc and lead with molten sodium hydrogen sulfate-potassium hydrogen sulfate eutectic were investigated by means of thermogravimetry, differential thermal analysis, X-ray diffraction, mass spectral and infrared methods. In these acid-base reactions, the metal acetates were found to be converted into the corresponding metal sulfates, and acetic acid was the volatile product of each reaction. The temperatures and stoichiometries of the reactions have been determined.

A Study of Chemical Reactions in Molten Sodium-Potassium Bisulfate Eutectic. I. The Reactions of Metals

1979 ◽  
Vol 32 (6) ◽  
pp. 1385 ◽  
Author(s):  
BJ Meehan ◽  
SA Tariq
Keyword(s):  
Chemical Reactions ◽  
Protective Coating ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Quantitative Results

The reactions of 18 metals with molten sodium-potassium bisulfate eutectic were studied. Results obtained isothermally at 200�C indicated that Al, V and Au did not react with the melt; Na, Mg, Mn and Zn reacted to produce H2; Co, Ni, Cu, Ag, Sn, Hg and Pb produced SO2 and H2O; while Ti, Cr, Fe and Cd produced H2, H2O and SO2. Reactions in general were slow and, due to formation of a protective coating on the surface, metals reacted only partly, with the exception of Na, Cu, Ag and Zn which reacted and dissolved in the melt completely. Due to partial reactions mostly qualitative or semi-quantitative results were obtained and possible reaction stoichiometries have been suggested.

A Study of Chemical Reactions in Molton Sodium-Potassium Hydrogen Sulfate Eutectic. IV. The Reaction of Eight Oxalates

1985 ◽  
Vol 38 (7) ◽  
pp. 1123
Author(s):  
JO Sabato ◽  
SA Tariq
Keyword(s):  
Alkali Metals ◽  
Alkaline Earth ◽  
Hydrogen Sulfate ◽  
X Ray Diffraction ◽  
Metal Sulfate ◽  
Chemical Methods ◽  
Sodium Potassium ◽  
X Ray ◽  
Potassium Hydrogen ◽  
Wet Chemical

The reactions of oxalates of ammonium, alkali metals (Li, Na and K) and alkaline earth metals (Mg, Ca, Sr and Ba ) with sodium-potassium hydrogen sulfate eutectic were investigated. Oxalic acid was found to be an intermediate product in all these reactions. Final products of the reactions as determined by thermogravimetry , differential thermal analysis, X-ray diffraction, infrared and 'wet' chemical methods consisted of a mixture of H2O, CO, CO2 and the corresponding metal sulfate. The stoichiometries of the reactions were elucidated.

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