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Pathway of Sucrose Oxidation in Manganese (Pyrolusite) Nodule

Polymetallic sea nodules are the potential resources of copper, cobalt, manganese, and nickel. The exploration and exploitation of manganese nodules are necessary to meet the future demands of Mn in the world. This work describes the valuable extraction of Mn through an innovative approach of using... Full description

Contained in: Industrial and Engineering Chemistry Research Vol. 54, No. 49 (2015), p. 12233-12241
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Links: Additional Link (dx.doi.org)
Additional Keywords: COBALT
ERHOEHTE-TEMPERATUR
HYDROXYMETHYLFURFURAL
KUPFER
LAGERSTAETTENAUFSCHLUSS
MANGAN
MANGANDIOXID
MANGANKNOLLE
METALLEXTRAKTION
METALLHERSTELLUNG
OXIDATIONSREAKTION
UMGEBUNGSTEMPERATUR
ZUKUENFTIGER-BEDARF
DOI: 10.1021/acs.iecr.5b02881
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 9 Seiten, 35 Quellen
ID (e.g. DOI, URN): 10.1021/acs.iecr.5b02881
PPN (Catalogue-ID): WTI000338613
Note: WTI TEMA DB
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520 |a Polymetallic sea nodules are the potential resources of copper, cobalt, manganese, and nickel. The exploration and exploitation of manganese nodules are necessary to meet the future demands of Mn in the world. This work describes the valuable extraction of Mn through an innovative approach of using sucrose as a reductant. The metal extraction from the nodule leaching was studied in ambient temperature (27 °C) and at an elevated temperature 90 °C with and without agitation. In both cases, 99.9% of Mn was extracted while the extraction time appears to be significantly low (2 h) at 90 °C but it requires a longer time of 24 h at 27 °C. The optimum sucrose concentration selected was 7% (w/w) of nodule for maximum metal extraction. With use of 10% (v/v) H2SO4, 7% (w/w) sucrose at 90 °C, and solid to liquid (S/L) ratio of 1:10 the achieved metal recovery figures were the following: Mn >99%, Ni 98%, Cu 87%, Co 83% in 2 h. The oxidation pathway of sucrose is outlined in this study with the aid of mass spectrometry during reductive leaching of ocean bed nodule. Sucrose in acidic environment generates 1- or 6-monoacid of sucrose with ions of m/z (mass-to-charge ratio) 355 and 127, 5-hydroxymethylfurfural (5HMF). A dehydrated glucose complex (m/z 325) was generated at elevated temperature. These released organics act as reductant for the leaching of Mn2+ from MnO2. Glucaric acid (m/z 211) is generated as the end product of the sucrose oxidation in the solution. 
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653 4 |a KUPFER 
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653 4 |a LAGERSTAETTENAUFSCHLUSS 
653 4 |a METALLHERSTELLUNG 
653 4 |a ERHOEHTE-TEMPERATUR 
653 4 |a HYDROXYMETHYLFURFURAL 
653 4 |a ZUKUENFTIGER-BEDARF 
653 4 |a UMGEBUNGSTEMPERATUR 
653 4 |a MANGANDIOXID 
653 4 |a MANGANKNOLLE 
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951 |a AR 
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