RU93032409A - METHOD OF OBTAINING BARIUM TITANATE - Google Patents

Claims (1)

The method of producing barium titanate relates to compounds of titanium, in particular, to methods for producing alkaline-earth metal titanates, which can be used in the manufacture of high-frequency ceramic capacitors. The invention provides improved process performance, stabilization of the composition and dispersion of the product, waste disposal and the creation of low-waste production of barium titanate. For the implementation of the method of obtaining barium titanate solutions of titanium tetrachloride, barium chloride and oxalic acid prepare a molar concentration of 1.8 - 3.0 mol / dm ³ , 0.8 - 2.0 mol / dm ³ and 0.8 - 2.0 mol / DM ³ respectively, mix these solutions in a molar ratio of 1.0: 1.1: (2.0 ^o C 2,5). Mixing is carried out either by sequentially adding oxalic acid, a solution of titanium tetrachloride to the solution, and then at a rate of 150–1500 l / h of a solution of barium chloride, or introducing pre-mixed solutions of titanium tetrachloride and barium chloride at a rate of 200–2000 l / h, followed by stirring the suspension with a speed of 60 - 300 rpm. The resulting barium titanyl oxalate is separated from the mother liquor, the barium titanyl oxalate is washed, calcined, and the filtrate is treated by boiling with sulfuric acid. The precipitate of barium sulfate is separated, and the acidic filtrate is heated to 90–105 ° C and treated with magnesium carbonate for 0.5–3.0 hours to pH 5–6, the magnesium chloride solution is separated from the solid residue and evaporated to a concentration that meets the requirements of the commercial product . The solid precipitate is calcined and get powders that can be used in the building materials industry.