Re: Re; dead battery

Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx> writes:

Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx> writes:

Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx> writes:

To separate the MnO2 [snip]

Assuming I managed to separate out the MnO2, is it possible to use it to
grow a large single MnO2 crystal?

I was just reading the discussiong of manganese in the CRC book. Apparently
it was first extracted from manganese dioxide by reducing with carbon. If
the MnO2 in the battery comes with powered carbon, as some have told me it
does to improve conductivity, then after the KOH and Zn are removed, maybe
one is nearly set up to produce elemental manganese.

Ill advised as this project might be, it has motivated me to consult
my copy of Harold Frederic Walton's book, "Inorganic preparations.
A laboratory manual" (1948). Details of how to get Mn from MnO2 are
given on pp.165-167. It uses the Goldschmidt reaction with aluminum
in a Hessian fire-clay crucible. That doesn't sound like the kind of
reaction I would want to do in an apartment. But maybe there are others.
--
Ignorantly,
Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx>
* Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and
* comments do not reflect in any way on MIT. Also, I am nowhere near Boston.
.

Relevant Pages

  • Re: Re; dead battery
    ... Allan Adler writes: ... Assuming I managed to separate out the MnO2, is it possible to use it to ... I was just reading the discussiong of manganese in the CRC book. ... the MnO2 in the battery comes with powered carbon, as some have told me it ...
    (sci.chem)
  • Re: Re; dead battery
    ... Apparently it was first extracted from manganese dioxide ... by reducing with carbon. ... -94.051 kcal/mol while that of MnO2 is -124.29, ... Delta H's are in general T dependent, and CRC only tells you the ...
    (sci.chem)