Chemical News and Journal of Industrial Science, Tomy 101-102Chemical news office., 1910 |
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Strona 3
... potassium oxyfluoride . " " We had only 20 grms . of tantalic acid , but it was per- fectly pure . We had in addition various specimens of so- called purest tantalic and niobic acids , as they are obtained at a very high price from the ...
... potassium oxyfluoride . " " We had only 20 grms . of tantalic acid , but it was per- fectly pure . We had in addition various specimens of so- called purest tantalic and niobic acids , as they are obtained at a very high price from the ...
Strona 4
... potassium sulphate , and the solution tested with potassium sulphocyanide , when the absence of iron was proved by the non - appearance of a red coloration . The ferrous sulphide thus precipitated was free from niobic and tantalic acid ...
... potassium sulphate , and the solution tested with potassium sulphocyanide , when the absence of iron was proved by the non - appearance of a red coloration . The ferrous sulphide thus precipitated was free from niobic and tantalic acid ...
Strona 13
... potassium titanium fluoride and potassium niobium oxychloride , but this method is too tedious , and not applicable to small quantities . ( NOTE . -Quite recently one of us has obtained perfectly satisfactory separations of the three ...
... potassium titanium fluoride and potassium niobium oxychloride , but this method is too tedious , and not applicable to small quantities . ( NOTE . -Quite recently one of us has obtained perfectly satisfactory separations of the three ...
Strona 15
... Potassium Cyanide and Caustic Potash . -When niobic or tantalic acid is fused with potassium cyanide and enough caustic alkali to dissolve the acid in question , in the first case a melt of potassium niobate , very soluble in hot water ...
... Potassium Cyanide and Caustic Potash . -When niobic or tantalic acid is fused with potassium cyanide and enough caustic alkali to dissolve the acid in question , in the first case a melt of potassium niobate , very soluble in hot water ...
Strona 16
... potassium sulphate - the result was no better , and niobic acid remained partly in solution . The sulphuric acid niobium solution , when poured into concentrated ammonium sulphate solution , remained clear even after standing for eight ...
... potassium sulphate - the result was no better , and niobic acid remained partly in solution . The sulphuric acid niobium solution , when poured into concentrated ammonium sulphate solution , remained clear even after standing for eight ...
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