Manganese Sulfate → Manganese dioxide

Temperatur

30 °C

A laboratory scale amount of alpha form of MnO2 (“Alpha-MnO2”) was prepared as follows. It is noted that high volume production of Alpha-MnO2 can be accomplished using other industrial processes. 200 ml of 0.1 M KMnO4 and 200 ml of 0.15M MnSO4.H2O were prepared and individually heated to 30° C. The KMnO4 solution was placed in a beaker and stirred in an ultrasonic bath. The MnSO4 solution was added drop wise into the KMnO4 solution. A brown precipitate appeared. The precipitation continued until all of the MnSO4 solution was consumed. The beaker was taken out of the ultrasonic bath and was allowed to settle for 1 hour. The solution along with the precipitate was centrifuged at 9000 rpm for 2 minutes. After discarding the liquid, the precipitate was washed in deionized (“DI”) water and centrifuged again at 9000 rpm for 2 minutes. The precipitate was retrieved and dried under vacuum at 80° C. for 2 hours. Finally the resulting dried precipitate powder was annealed in air at 200° C. for 12 hours.

1. customThe precipitation
2. customwas consumed
3. waitThe solution along with the precipitate was centrifuged at 9000 rpm for 2 minutes
4. washthe precipitate was washed in deionized (“DI”) water
5. waitcentrifuged again at 9000 rpm for 2 minutes
6. customdried under vacuum at 80° C. for 2 hours
7. customFinally the resulting dried precipitate powder
8. waitwas annealed in air at 200° C. for 12 hours

ORD-Eintrag

ord-d61c9bb7ef52471c8bb579987fa24993

Quelldatensatz

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09340436B2