二酸化티탄의 鹽素化反應에 關한 硏究 = A Study on the Chlorination of Titanium Dioxide

다국어 초록 (Multilingual Abstract)

The chlorination of titanium dioxide in the presence of active carbon was investigated in a horizontal pyrex glass tube with and without catalyst. In both cases first order kinetics on titanium dioxide was observed with excess chlorine atmosphere in the temperature range of 320-700℃.
The rate of reaction was followed by measuring titanium tetrachloride produced as a function of time.
It was observed that the intermediate product, COCl₂, was found only in the reaction with catalyst, and the product, COCl₂, promotes the chlorination by reacting with TiO and chlorine.
The mixture of NaCl-CaCl₂ was found to have a tremendous effect on enhancement of the reaction rate(about 30 times over non-catalytic reaction) as a catalyst.
Activation energy of the slow step was determined to give 21.1 kcal/mole without catalyst. It was reduced down to 7.5kcal/mole in the presence of the catalyst depending on the mole ratio of NaCl-CaCl₂. This indicates that kinetics would be controlled by a chemical reaction rather than diffusion process.