I am trying to locate a table or chart showing the resultant abv of the distillate on Y axis and corresponding abv of the charge wash on the x axis. This is for a simple distillation (no plates or additional rectification). I know I have seen one before, but I can not find it now.
The table or chart would let me determine: if the wash is 7% ABV, then the resulting vapor (or distillate) will be 60% ABV after one distillation (as an example).
I am able to find the "Distillation Temperature and Concentration Relationship" chart, which shows Temperature on the Y axis and the resultant ABV of the distillate on the x axis, but it is not what I am looking for.
I appreciate any help. Thanks, Tom
Reply:
Tom,
If I understand what you're driving at, you want to:
[a] measure the temperature of the wash in the kettle, and based on that, know the ABV of the stuff in the kettle, or
measure the temperature of the vapor (above the wash) in the kettle (or still head) and based on that, know the ABV of the vapor, or
[c] measure the temperature of the wash in the kettle, and based on that, know the ABV of the vapor above the wash, or
[d] measure the temperature of the vapor (above the wash) in the kettle (or still head) and based on that, know the ABV of the stuff in the kettle...
Is that correct?
(Is it really as easy as that?)
You must be looking for the chart and graph on the last page of Chapter 2 of Bill Owens's book - the one we use in the ADI workshops.
If that's what you're looking for, I'll drive down to Bill's house a bit later and grab a copy and scan that page for you.
Reply:
I read it as he wants to know ..... If you have x%ABV wash, what will the resultant %ABV be.
"showing the resultant abv of the distillate on Y axis and corresponding abv of the charge wash on the x axis."
" if the wash is 7% ABV, then the resulting vapor (or distillate) will be 60% ABV for example"
Correct me, please, but I didn't think the beginning % had anything to do with the resultant %. Only the resultant volume at a given % . It's strictly temperature related. Still a newbie at this, but that's been my readings and findings.
Reply:
you may be right, but if he were asking that, what would be the determining factor for when it's done?
I think he's looking for something else.
"if the wash is 7% ABV, then the resulting vapor (or distillate) will be 60% ABV for example"
that's close...7% ABV liquid is about 52% ABV vapor at BP.
when the still is running, absent any reflux, at STP, assuming a simple ethanol/water mix, there is a fixed relationship between the ABV in the kettle and the ABV of the vapor coming off of it during boiling. additionally, the temperature of either the kettle or the vapor, is a clear indicator of either.
Reply:
I've got that plot - an XY diagram in chem-speak - but it's in mole fraction on both axes. Not real hard to convert. The other thing is that the curve is so steep at low ABV (<20%) that it's hard to read accurately.
Reply:
that's close...7% ABV liquid is about 52% ABV vapor at BP.
when the still is running, absent any reflux, at STP, assuming a simple ethanol/water mix, there is a fixed relationship between the ABV in the kettle and the ABV of the vapor coming off of it during boiling. additionally, the temperature of either the kettle or the vapor, is a clear indicator of either.
Reply:
The charts you are asking about can be found here. These are from well known formulas.
There are simple instructions and also instruction using the charts for diluting low wines for desired output abv.
The charts are in F and C.
http://www.artisan-distiller.net/photoalbum/main.php?cmd=album&var1=pint_o_shine/&var2=0
I hope it helps.
Reply:
Sherman,
Did you correct your data from %Wt to %Vol?
The data below are from Wikipedia's ethanol data page, which takes data from CRC, but it's truncated (so I've ordered a copy of CRC).
Some time ago, I worked through the Clausius-Clapeyron equations, and it took so long that when I was done, I couldn't remember why I had done it. It was because the Wikipedia data is truncated. Now I can't find any of it.
So, these values are from Wikipedia corrected from %wt to %vol using derived data from TTB Table 6.
Will
BP °FVolume % ethanol
LiquidVapor
172.697.097.0
172.893.594.5
173.189.092.5
173.587.091.5
173.885.091.0
174.283.590.0
174.682.089.0
174.980.089.0
175.378.588.5
175.676.088.5
176.074.087.5
176.471.087.5
176.769.587.0
177.166.587.0
177.463.586.0
177.860.586.0
178.257.585.0
178.554.585.0
178.952.585.0
179.250.584.5
179.648.084.5
180.542.583.5
181.439.583.5
182.336.082.5
183.232.582.5
184.130.081.0
185.028.080.0
185.925.579.5
186.824.078.5
187.722.077.5
188.620.576.5
189.519.576.0
190.418.075.0
191.316.074.0
192.214.572.0
193.113.570.5
194.012.068.5
194.912.066.5
195.811.064.5
196.79.562.5
197.69.560.5
198.58.558.5
199.47.056.5
200.37.053.5
201.26.051.5
202.16.049.0
203.05.046.0
203.95.042.5
204.83.539.5
205.73.536.0
206.62.532.5
207.52.528.0
208.41.023.0
209.31.018.0
210.20.512.0
211.10.06.0
212.00.00.0
BP Ethanol Mixtures.pdf
Reply:
Thank you guys. This is perfect! The link to expedia from Will has the table ... the link from Sherman has a pretty chart. Exactly what I was looking for.
Tom
