Preparation of chemical manganese dioxide from manganese sulfate

✍ Scribed by Jiangang FU; Zhangxing HE; Hui WANG; Wei LIANG; Chao GUO

• Publisher: Elsevier
• Year: 2010
• Tongue: English
• Weight: 549 KB
• Volume: 20
• Category: Article
• ISSN: 1674-5264
• DOI: 10.1016/s1674-5264(09)60299-4

✦ Synopsis

Chemical Manganese Dioxide (CMD) was prepared by an alkali-oxidation method. There are several virtues to this environmental friendly and clean process, including the nontoxic and harmless reagents and products, easy operations, no pollutants, easily obtained raw materials and moderate reaction conditions. The synthesized manganese dioxide was characterized by XRD and SEM. The particles were small, consisting primarily of -MnO 2 and -MnO 2 . Experimental results showed that the optimum conditions were: MnSO 4 •H 2 O to NaOH ratio, 1.0:2.4; catalyst concentration (catalyst TF-2), 6% of the MnSO 4 ; initial solution pH, 11; reaction time and temperature, 20 min and 80 °C; air flow, 0.20 m 3 /h; and, agitation rate, 700 r/min. The conversion of MnSO 4 can exceed 80% under these optimum conditions.