Patent ID: 7510694
Filing Date: 2009-03-31
Classification: B82Y,C01B,C01G,C01P

Abstract:
1. An environmentally benign process for the simultaneous preparation of the nanocrystalline anatase titanium dioxide powder having particle size in the range of 1 to 5 nm and hydrazine monohydrochloride, said process comprising the steps of: (i.) adding hydrazine monohydrate solution dropwise to an acidic aqueous solution of titanium tetra chloride in a nitrogen atmosphere at a temperature in the range of 20 to 40° C. with constant stirring to form precipitate, (ii.) filtering the precipitate of step (i) to obtain titanium dioxide having a particle size in the range of 1 to 5 nm and optionally freeze drying and washing the filtrate to obtain hydrazine monohydrochloride.