Nathan, I run mine at around 79.2C to get a better flow and will collect at 93%ABV and will cut within the Ethonal range and cut to tails when the headMessage 1 of 2 , Aug 10, 2010View SourceNathan,I run mine at around 79.2C to get a better flow and will collect at 93%ABV and will cut within the Ethonal range and cut to tails when the head reaches 82C and this is dropping to around 88% to 89% and as I look for good neutral wil then then open it up to collect tails.Cheers Ken Mc
From: Nathan Stanley <catfish@...>
Sent: Wed, 11 August, 2010 11:40:15 AM
Subject: [new_distillers] Question about temperature and yield
I have a question about temperature at the top of my reflux column.
Usually I run my still at a high heat to quickly distill the wash and
get a decent time spent vs quality ratio.
Last time I did a run I was doing what I call a double distill. I take
the spirit from the first run (as described above) filter it, water it
down to about 35% and then distill it.
I had 25L @ 35% alc/vol which I worked out is about 8750mL @100%. When I
double distilled I set the heat lower than I usually do and the
temperature sat at 79.5C for probably 70% of the time. The distilate was
coming out at about 90% for most of the time.
I ended up with 6.4L at 90% and 2.2L at ~80%. So I calculate this down
to be 9.32L at 100%. Towards the end of the run the temp was rising
gradually through no intervention of my own and when I shut down the
still it was at about 95C
Did I take too much alcohol from the batch because from my calculations
I think I did. Also, is it normal that the temperature will be
maintained at 79.5C for most of the run and that it will rise gradually
even though I am not changing anything like the level of heat?
PS: I think I've asked this on here before, but, is it safe to distill