Fedorenko A. Electrochemical synthesis of titanium(III) sulfate in titanium(IV) oxide production technology

Object of study: electrode processes for obtaining crystalline titanium (III) sulfate in sulfuric acid production technology solutions pigmentary titanium (IV) oxide. Objective: technology improvement sulfate pigment titanium (IV) oxide by electrochemical reduction of iron (III) and titanium (IV) in sulfuric acid solution. Methods: Kinetic parameters reducing the formation of electrochemical reactions, electrolysis process efficiency and galvanomagnetic measurements performed using cyclic voltammetry (TSVA) and conductometric measurements. Corrosion resistance of anodes and cathodes in sulfuric acid solution was determined by polarization resistance and gravity. The chemical composition of electrodes and electrolytes defined spectrophotometric and thermogravimetric analyzes the density of the electrolyte - densymetrychno. Theoretical and practical results: increased linen the final product of 97 to 98.5 cu. The possibility of carrying out the process of working cathode current density to 5.0 A / dm2. Developed design electrolyzers for electrochemical active reducing titanium (III) sulphate using permanent magnets. Scientific novelty: the first relay mechanism proposed reduction of iron (III) and titanium (IV) involving hydride ions adsorbed on the surface of the cathode, which is the scientific basis for the technology of electrochemical synthesis; Set electrochemical activation energy and the current process of exchange, depending on the material of the electrode; The high catalytic activity of niobium in the reactions of reduction of iron (III) and titanium (IV) in sulfuric acid technology solutions, due to large energy of Nb-H, as well as its high resistance; The possibility of reducing concentration polarization (~ 2 times) by mixing the electrolyte in electrolyzers under integral component of the Lorentz force using permanent magnets; The theoretical foundations of electrochemical active reducing titanium (III) sulphate, thanks to the mesh as the cathode layer 08H18N10 of Nb and mixing the electrolyte, going beyond the current was 93 ± 2%. Degree of implementation: The results of the thesis are introduced in LLC "Pivdenruda" (c. Dnepropetrovsk) and used in teaching of General and Physical Chemistry TNU. VI Vernadsky. Scope: enterprises manufacture of titanium (IV) oxide learning process.