Irreversible reaction

Reversion of recycled permanganate to manganate in the hot KOH melt

4KMnO4+4KOH4K2MnO4+O2+2H2O

Direction
Irreversible
Processes
1
Stated as
Fixed conversion
Heat of reaction
ΔH = -172,200 kJ/kmol (one process)
Element balance
Checked: balances
As the processes state itStoichiometry, conversions, heats of reaction and catalyst windows are taken from each process's files with their provenance. The build checks only that each process's equation balances in every element, from the process's own component formulas; it does not check the numbers. A process's design maturity applies to them.

Species

SpeciesNameCASRoleCoefficient
KMnO4Potassium permanganate7722-64-7reactant-4
KOHPotassium hydroxide1310-58-3reactant-4
K2MnO4Potassium manganate10294-64-1product4
O2Oxygen7782-44-7product1
H2OWater7732-18-5product2

In the processes

  • Potassium permanganate from MnO2 ore by KOH roasting and electrolysis (1250 kg/h, concept)Concept · not reviewed

    REDKM · Reversion of recycled permanganate to manganate in the hot KOH melt4 KMnO4 + 4 KOH → 4 K2MnO4 + O2 + 2 H2O(g)

    Stated as
    Fixed conversion
    Phase
    mixed
    Element balance
    Balances in every element
    Conversion
    100 % of KMnO4 (assumed: D-004: permanganate is not stable in concentrated hot alkali; the KMnO4 of the recycled concentrate is taken as fully reduced to manganate)
    Heat of reaction
    ΔH = -172,200 kJ/kmol at 298.15 K, as written (assumed: formation enthalpies K2MnO4(s) -1184.1, H2O(g) -241.8, KMnO4(s) -837.2, KOH(s) -424.8 kJ/mol (NBS tables, D-009))

Sources

What the processes cite for this reaction, each source once: for the reaction itself, its conversion, its heat of reaction or its catalyst. As the processes write them; DOIs, US patent numbers and web addresses are linked.

  1. D-004: permanganate is not stable in concentrated hot alkali; the KMnO4 of the recycled concentrate is taken as fully reduced to manganate

    For the conversion · cited by Potassium permanganate from MnO2 ore by KOH roasting and electrolysis (1250 kg/h, concept)

  2. formation enthalpies K2MnO4(s) -1184.1, H2O(g) -241.8, KMnO4(s) -837.2, KOH(s) -424.8 kJ/mol (NBS tables, D-009)

    For the heat of reaction · cited by Potassium permanganate from MnO2 ore by KOH roasting and electrolysis (1250 kg/h, concept)