Journal of the Chemical SocietyThe Society., 1952 |
From inside the book
Results 1-3 of 12
Page 1498
... niobium the recovery of tantalum was of the order of 97 % , but in the presence of niobium in amounts equal to or in excess of the tantalum it was quantitative . Addition of hydrofluoric acid to the solvent decreased the recovery of ...
... niobium the recovery of tantalum was of the order of 97 % , but in the presence of niobium in amounts equal to or in excess of the tantalum it was quantitative . Addition of hydrofluoric acid to the solvent decreased the recovery of ...
Page 1501
... niobium , recoveries are of the order 92-96 % , indicating appreciable hold - up of tantalum . However , when tantalum is present with equivalent amounts of niobium or with other foreign ions , the recoveries are reasonably good , being ...
... niobium , recoveries are of the order 92-96 % , indicating appreciable hold - up of tantalum . However , when tantalum is present with equivalent amounts of niobium or with other foreign ions , the recoveries are reasonably good , being ...
Page 1504
... niobium fraction . Good recoveries of niobium appear to be obtained in all cases but contamination by Ti , Zr , and Sn is appreciable . Research is in progress to overcome the interference by Ti , Zr , and Sn and also to improve the ...
... niobium fraction . Good recoveries of niobium appear to be obtained in all cases but contamination by Ti , Zr , and Sn is appreciable . Research is in progress to overcome the interference by Ti , Zr , and Sn and also to improve the ...
Contents
244 | 1196 |
219 | 1216 |
The Polymerizability of Methyl atert Butylacrylate | 1220 |
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Common terms and phrases
4-thionflavone 5-triazine absorption acetic anhydride acetone added alcohol alkaline Amer aqueous sodium atom benzene benzylamine boiling bromide Calc carbon CHâ‚‚ Chem chloride chloroform colour colourless compound concentrated sulphuric acid condensation cooled crystals D.Sc decomp decomposition derivatives dilute dioxide diphenyl dissolved distilled dried ester ethanol ether ethyl alcohol ethyl nitrate evaporated extracted filtered filtrate flavone fluorination formation formed Found fraction gave give m. p. heated under reflux hexamine hydrochloric acid hydrolysis hydroxyl insoluble iodide ionisation isolated ketone lactone light petroleum b. p. m. p. and mixed methiodide method methyl minutes mixed m. p. molecule needles niobium nitrate nitrobenzene obtained olefin oxidation picrate potassium hydroxide precipitate prepared prisms pyridine requires residue room temperature salt separated sodium hydroxide solid soluble solution solvent solvolysis sorbitol sulphate sulphuric acid tetrabenzyl pyrophosphate values washed yellow yield