High purity titanium tetrachloride hydrate is one of the fundamental materials to synthesize high purity titanium dioxide and its double oxide for the perovskite structure of electronic materials in the liquid phase and it is used not only in industrial production but also in much research and development. It is synthesized by the partial hydrolysis of titanium tetrachloride and the reactivity of the reaction is violent. In this study a new method to produce titanium tetrachloride hydrate is shown. The titanium tetrachloride hydrate is safely produced by this reactor in large scales. The hydrate produced by this process is transparent without any crystallized deposits and it is of very high purity.