I would take off the fraction from 78C to 79C. If
you insist on drinking the output, it should be "pure" :-)
I would try to leave a little bit of the ethanol in
the distilling flask at the end of the run.
The glass bead column on this one is pretty small.
The one on my rig at work was a foot taller, and the chemist
who set up the rig, claimed the glass bead column
was good for "a hundred thousand theoretical plates",
which is a measure of goodness. I had to take my rig
all apart at the end of the work day, and lock up the
component parts. That's because any decent thief who
broke into the lab, the first thing they'd want is my still.
Don't forget to add a boiling chip to the distilling flask.
The chip must be discarded from one run to the next, and if
the rig is allowed to cool off in the middle of a run,
you add *another* chip. Once the gas bubbles collapse in
on the chip, you need another to start the process of nucleation
again. If the distilling flask is allowed to superheat, it can
shoot up the column, blow out the thermometer (mercury spill!),
and blow liquid all over the nice white ceiling tiles. This is
why we're careful with our boiling chip. I've only seen one
stain on a lab ceiling, from that sort of negligence.
The electric mantle heater goes under the distilling flask.
One of the time wasters running a rig like that, is
cleaning the distilling flask afterwards. You can burn on
deposits on the distilling flask. If allowed to build up a
thick layer of deposits, the boiling action in the vessel
will be unstable, and even with a boiling chip, the boiling
action might not be all that good. If you keep the equipment clean,
after you set the control on the mantle, you can relax and just
check the thermometer every once in a while. Perhaps
a good usage for a webcam with macro capability, as getting up
on the bench to check the thermometer is a nuisance.
The distilling flask on mine, might have been two liters,
not like the puny thing in the picture. I was recycling hexane
for the lab, one of our major consumables.
One cleaner is Alconox. Our lab assistant who did the cleaning,
she had a steam-temperature cleaning machine, that was loaded
with the Alconox. But for stubborn stains, we'd use "green cleaner"
to take care of it. The "green cleaner" is a suspected carcinogen,
which is why you might not even find it in a lab today. Generally,
the labwork is not intended for human consumption, which is why
the green cleaner was used with abandon. You don't throw
the green cleaner out, you just throw it back in the bottle.
When it changes colour and is no longer green, it is spent,
and can be sent to hazardous waste. It rinses off well, but you'd
still rinse the living shit out of it.
After a summer of using my still, the distilling flask was
as clean as the day I started work there.
A ghetto chemist would have died to have a rig like that.
Such beautiful glassware.