Porous and fine sphere of iron oxide and production thereof

摘要: PURPOSE:To enable production of the titled fine sphere having specific range average particle size and pore size, by using iron (III) nitrate instead (II) sulfate in method for blending W/O type emulsion an aqueous solution with NaHCO3. CONSTITUTION:An is blended organic solvent (e.g. benzene) surfactant to prepare a emulsion. Then NaHCO3, precipitation reaction carried out at surface liquid drop wall membrane insoluble water formed on provide consisting membrane. Fine oxide exhibiting perfect globe about 0.1-20mu porous structure 2-60nm obtained above-mentioned method. The contains no residual SO 4 providing function inhibiting factor such as catalyst poison.