12-01-2017 дата публикации
Номер: US20170009078A1
The method of producing stannous oxide includes: a Sn ion-containing acid solution forming step (S); a first neutralizing step (S), which is a step of forming Sn precipitates by adding one or more of alkaline solutions of ammonium carbonate, ammonium bicarbonate, and aqueous ammonia to the Sn ion-containing acid solution to retain pH at 3-6 therein; a Sn precipitate separating step (S); a Sn precipitate dispersing step (S), which is a step of dispersing the separated Sn precipitates in a solvent liquid to obtain a dispersion liquid; and a second neutralizing step (S), which is a step of forming SnO by adding an alkaline solution to the dispersion liquid of the Sn precipitates and then by heating, wherein Na, K, Pb, Fe, Ni, Cu, Zn, Al, Mg, Ca, Cr, Mn, Co, In, and Cd reside in the Sn ion-containing acid solution in the first neutralizing step (S). 1. A method of producing stannous oxide comprising:a Sn ion-containing acid solution forming step, which is a step of preparing a Sn ion-containing acid solution by adding Sn ions to an acid solution;a first neutralizing step, which is a step of forming Sn precipitates by adding one or more of alkaline solutions of ammonium carbonate, ammonium bicarbonate, and aqueous ammonia to the Sn ion-containing acid solution to retain pH at 3-6 therein;a Sn precipitate separating step, which is a step of separating the Sn precipitates from the Sn ion-containing acid solution;a Sn precipitate dispersing step, which is a step of dispersing the separated Sn precipitates in a solvent liquid to obtain a dispersion liquid; anda second neutralizing step, which is a step of forming SnO from the Sn precipitates by adding an alkaline solution to the dispersion liquid of the Sn precipitates and then by heating, whereinNa, K, Pb, Fe, Ni, Cu, Zn, Al, Mg, Ca, Cr, Mn, Co, In, and Cd reside in the Sn ion-containing acid solution in the first neutralizing step.2. The method of producing stannous oxide according to claim 1 , further comprising an acid ...
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