Technical support is available to registered users of MINEQL+ version 4.0 and greater. We no longer support version 3.x for DOS, although it will still be available through the download section.
To contact tech spport directly, see page 4 of the User's Manual or e-mail us.
Please include the following
information when corresponding with us:
Your name
Product serial number
A brief description of the problem
A copy of the problem's *.MIF file
Techical support is available Monday through Friday, 8:00
am to 5:00 pm EST.
MINEQL+ FAQ list
I have a personal thermodynamic database
from version 3.0, can I use it in version 4.x?
Yes. Simply copy the file: PERSONAL.DAT from your
version 3.0 directory over to your version 4.x directory.
MINEQL+'s equilibrium constants don't make
any sense to me. They don't match anything I've seen in
the literature.
This can happen for many reasons. First, be sure that the
constants you have found in the literature are referring
to the same chemical reaction as the one in MINEQL+.
Often the reactions are similar, but use a different
reference level (for instance, HCO3-
vs. CO32-). Another reason is that
MINEQL+ always writes its equations as formation
reactions. This means that solid phase reactions are
always written in the direction of forming precipitates
rather than the dissolution of the solid. This will make
a difference in the sign of the equilibrium constant.
Finally, reasonable differences will always exist between
literature values, so it's not surprising that you will
be able to find values that differ slightly from those
used in MINEQL+. See Chaper 15 of the User's Manual for
more information about thermodynamic data.
When I run a single calculation I get a
different answer than when I run the same problem as a
titration. What's happening? When you use the
MultiRun options, MINEQL+ uses the single run settings as
a template for all input parameters except the parameter
you specifed in the MultiRun Manager. For instance, you
may be performing a fixed pH titration in the range of pH
from 4.0 to 8.0. Everything in the problem is provided by
the single run template except pH which is supplied by
the MultiRun Manager. On the other hand, if you switch
the calculation to a single run, MINEQL+ will use the pH
supplied by the template (by default the pH is set to
7.0). Since the pH of the single run and that of the
MultiRun do not correspond, it is not surprising that
that final answers differ.
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