Method for producing yellow hydrated ferric oxide

Details Method for producing yellow hydrated ferric oxide Method for producing yellow hydrated ferric oxide

C - Chemistry, Metallurgy

01

G

23/267

C01G 49/06 (2006.01)

Patent

CA 1071844

METHOD FOR PRODUCING YELLOW HYDRATED FERRIC OXIDE ABSTRACT OF THE DISCLOSURE Yellow hydrated ferric oxide having uniform and proper particle size can be economically produced by the present invention which comprises allowing an ammonium salt to be present in a given concentration in a ferrous salt solution, partially neutralizing the mixed solution with ammonia, oxidizing it with air to obtain a seed liquid, adding a ferrous salt solution to said seed liquid and simultaneously adding ammonia thereto to attain a suitable pH value and oxidizing the ferrous salt with air at said pH whereby a uniform particle size can be rapidly obtained.

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