THE MINERAL INDUSTRY ITS STATISTICS, TECHNOLOGY, AND TRADE IN THE UNITED STATES AND OTHER COUNTRIES, TO THE END OF 1899

E. H. Smith
1900 Journal of the American Chemical Society  
T h e filtrate containing the dissolved molybdic acid showed no tungstic acid upon examin a t' ion. These results indicate that where the two oxides are present together this mode of separation is apparently of value and merits consideration. A weighed quantity of a ferric salt equivalent to 5 grams of ferric hydroxide was precipitated with ammonia water and theresulting precipitate, after being mashed, was mixed in a beaker with different amounts of tungsten trioxide, and the resulting mixture
more » ... e resulting mixture was then digested with sulphuric acid of the strength of that used in the preceding experiments. T h e residual oxide was treated as before :
doi:10.1021/ja02049a008 fatcat:4ggx6vptc5ef5gm6qzhpcz35fa