Method for obtaining high purity anhydrous nanocrystalline nickel (II) tungstate (VI)

摘要

method for nanokrystalicznego wolframianu (vi) nickel (ii) high purity by mixing aqueous solutions of soluble salts of tungsten (vi) and nickel (ii) is characterized by the fact that to an aqueous salt solution of tungsten (vi) containing above 5 g / dm3 in, 30 g / dm3 in the following beneficial be close to the saturation salt solution dissolved nickel (ii) favourably acetate,in such a quantity that the mixed molar ratio of nickel to tungsten was greater than 1.5 and smaller than 15, preferably 2, all mixed at a temperature of above 105 degrees fahrenheit within 30 to 240 minutes, preferably 90 minutes, so that the ph of the mixture was in the range of 6.0 to 9.5, preferably 7,0 - 7.7.and ph adjustment is carried out by using 5 - 15% aqueous solutions of ammonia and / or sodium hydroxide, and separated sludge is subjected to purification and subsequent drying.