The present disclosure relates to reacting tin metal with crude TiCl4 containing arsenic to produce pure TiCl4, SnCl4, and an arsenic solid co-product. In some embodiments, the contaminant vanadium is removed as well. The reaction is preferably done in a continuous fashion in two stages for maximum through-put and utility at an elevated temperature. Distillation can be used to purify the TiCl4 produced and simultaneously yield a purified SnCl4 product. The synthesis of SnCl4 in this method utilizes waste chloride to save virgin chlorine which would otherwise be used.