Tin tetrachloride → Tin hydroxide (Sn(OH)4)

Tan et al. disclosed a process for the preparation of mixture powder containing tin and molybdenum oxides (Sn-Mo-O) (see J. of Catalysis, 17, 132-142(1970)). In their process, ammonia water was added into a water solution of tin tetrachloride to obtain tin hydroxide precipitate, which was then dispersed in the water solution of molybdenum ammonia. The binary oxide powder was finally obtained by drying the solution. Sala et al. disclosed a process for the preparation of Sn-Sb-O powder (see J. of Catalysis, 34, 68-78 (1974)). In this process, ammonia water was added the water solution of tin chloride and antimony chloride to obtain mixture precipitate of tin hydroxide and antimony hydroxide, which was then dried.