The invention belongs to a method for dissolving titanium and zirconium metals in titanium group metals in inorganic chemistry.
Titanium group elements of elemental metal titanium, zirconium is very insoluble substances, general acid, alkali such as hydrochloric acid, nitric acid, phosphoric acid, potassium hydroxide, sodium hydroxide and so on is very difficult to dissolve with wet method, even if the dissolved acid such as sulfuric acid, hydrofluoric acid and other methods, need a long time to heat boiling, high energy consumption, slow, small dissolution ability.
The purpose of the present invention is to develop a method that can dissolve titanium group metal quickly with common reagent under normal temperature and pressure, so as to further prepare high quality titanium group metal salt.
Method for the dissolution of the present invention includes a, using sulfuric acid or hydrochloric acid or nitric acid as solvent, then b, add 0.1 ~ 10% of the total weight of solution fluoride as catalyst, and stir well after c, join solute and adjusting the concentration of water, d, make the temperature of 60 ℃ ~ 100 ℃ trigger a reaction, to be violent reactions, e, and add water to control the reaction rate.
Sulfuric acid or hydrochloric acid or nitric acid is used as the solvent, usually adopts the concentrated acid, adding catalyst after add water trigger a reaction, all kinds of different concentrations of acid initiation reaction for example to use to add water dilute sulfuric acid dissolved titanium and zirconium to 15 ~ 80% initiation reaction, without heating, dilute sulfuric acid hot enough to trigger a reaction, reaction speed is required for a dramatic response to water control, hydrochloric acid dissolved titanium or zirconium, with 30 ~ 37% without adding water dilute hydrochloric acid concentration, directly heated to a temperature of 60 ℃ above initiation reaction, using nitric acid solution, concentration of 30 to 80% of the direct solution of titanium metal.
The temperature initiated by the acid hydrolysis reaction is 60℃ ~ 100℃. When sulfuric acid is used, external heating is not needed, but the dilution heat is sufficient to initiate the reaction. When hydrochloric acid or nitric acid is used, external heat must be reached to 60℃ ~ 100℃. In order to prevent the bubbling phenomenon due to the violent reaction, water should be added to control the reaction speed. The amount of water added accounts for 10 ~ 30% of the total solution weight.
