Ammonium niobium titanium hydroxide

CKO2H 2X3, Formic acid, potassium salt, compd. with tantalum sulfide (XaS2), [34314-17-51,30 164 CNNbOjTiH , Ammonium niobium titanium hydroxide oxide ((NH4)o5NbTi(OH)o.504.5),... 

NNb05TiCH7. Ammonium niobium titanium hydroxide oxide... 

Pla.tinum, Platinum plating has found appHcation in the production of platinised titanium, niobium, or tantalum anodes which are used as insoluble anodes in many other plating solutions (see Metalanodes). Plating solutions were often based on platinum "P" salt, which is diamminedinitroplatiniim (IT). A dinitroplatinite sulfate—sulfuric acid bath has been used to plate direcdy onto titanium (129). This bath contains 5 g/L of the platinum salt, pH adjusted to 2.0 with sulfuric acid. The bath is operated at 40°C at 10—100 A/m. Other baths based on chloroplatinic acid have been used in both acid and alkaline formulations the acid bath uses 20 g/L of the platinum salt and 300 g/L hydrochloric acid at 65° C and 10—200 A/m. The alkaline bath uses 10 g/L of the platinum salt, 60 g/L of ammonium phosphate and ammonium hydroxide to give a pH of 2.5—9.0. The alkaline bath can be plated directly onto nickel-base alloys acid baths require a gold strike on most metals. 

Loparite is decomposed in hot concentrated sulfuric acid and addition of ammonium sulfate. The rare-earths and thorium separate as double sulfates and are removed by filtration. The remaining solution of sulfates contains titanium, niobium and tantalum and is removed for separate processing. The double sulfates of rare-earths and thorium arc converted to carbonates followed by dissolution in add. Thorium is seperated by precipitation when the alkalinity of the solution is raised by the addition of sodium- or ammonium hydroxide. 

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