Redistilling
Posted: Mon Nov 08, 2004 1:50 pm
mshinner
09/03/04 01:32 AM
Redistilling
I now have 2 galons at 92% abv. I was thinking about running back thru the still to get it up to 95% and see if I could notice a differnce in the taste, should I add water and dilute it down before I run it? if so how much should I add if any? I have an external heat source (hot Plate)
ProfessorDuck
09/03/04 01:52 AM
Re: Redistilling new [re: mshinner]
My understanding is that you only ever need to add water to avoid exposing elements. Since you're not using an element, the answer is no.
Question reality...
LeftLaneCruiser
09/03/04 02:06 PM
Re: Redistilling new [re: mshinner]
From what i have read you should water it down to about 50%. This because of the danger of explosions inside your boiler.
I haven't tried redistilling a high proof wash myself, so no personal experience can be added.
KJH
Destillatori te Salutat
Knuklehead
09/03/04 06:17 PM
Re: Redistilling new [re: mshinner]
I have tried it and the only thing it did was make some of my product disappear with no real difference in the taste. You would be much better off to carbon filter it if you want to make it a little cleaner tasting then to run it again. Is your column capable of making 95%? If it is I would suggest making the necessary adjustments like refluxing more and do that on your next run. Put a cup of carbon per liter and let it sit for a week shaking it a few times a day if you can remember. Then a day before you want to filter it off the carbon put it in the freezer for a few hours. Then pass it through your filter and that I know will make a difference in smell and taste. If you want to redistill then you should do a strip run collecting everything fast so you end up with a product with a higher % then your original wash. Then do your reflux run.
I am Canadian
leglessboot
09/04/04 02:54 AM
Re: Redistilling new [re: Knuklehead]
That's a lot of carbon, what sort (cheapest if possible) would you use?. I have put a few grammes in with a litre or so. It's made for taking off flavours out of wine etc, comes in the form of pellets which disintigrate into a powder as soon as in solution trouble is it's expensive. Even in such a small quantity it makes a difference to the taste.
Another solution is to use the Turbo Pure type yeasts. They ferment a cleaner wash. Waiting for some to come in the post. When it does I'll report here on the results.
LeftLaneCruiser
09/04/04 05:13 AM
Re: Redistilling new [re: leglessboot]
A cup for one litre sounds a lot to me too, i would say a few spoonfulls ( 1-3 ) should do the trick.
The cheapest carbon treating of your distillate might be using charcoal, the same as you use for the barbecue. But as this is a lot less active than the activated you need more for the same result. As i have used this before i got some activated carbon i can say from experience that it works.
KJH
Destillatori te Salutat
Knuklehead
09/04/04 10:35 AM
Re: Redistilling new [re: LeftLaneCruiser]
Oh yea you are right it is a lot of carbon, lol. I use KC06 carbon which is "cleanable" so doesn't really matter to me how much I dump in there and carbon is a filter so the more the better, at least in my opinion. I paid around $12.00 for 1.7L bag so I don't find that so expensive since I can use it clean it and use it again. More carbon in the bottle means more surface area which means the filtering will be done faster. I use one cup of carbon, let it sit for a week shaking it a few times a day, then cold filter it out and it is nice and clean smelling and tasting. I have tried it with less but I had to let it sit longer and still didn't come out as clean as it does now so I just pile on the carbon . I'll tell you though, I have to run it through a filter for sure 4 times to get all the carbon dust out of it but I see it as being worth it.
I am Canadian
LeftLaneCruiser
09/04/04 12:45 PM
Re: Redistilling new [re: Knuklehead]
Doesn't filtering it four times take a huge amount of time?
just curious..
KJH
Destillatori te Salutat
Knuklehead
09/04/04 05:14 PM
Re: Redistilling new [re: LeftLaneCruiser]
Yes actually it does but its not like stilling. You can do it while you watch TV or read posts on this site or whatever its not like it is something you have to keep a close eye on. I have a large funnel and all I do is pop a cotton ball in the spout, place the funnel on the bottle and filler up. Come back every 5 minutes (commercial break) and filler up again. I filter like this until the cotton comes out without any carbon dust in it so 3 times would most likely do it, 4th time is just to make sure. Another thing I do on the last time through the filter is make sure the funnel never runs dry. I use a black funnel and there is a light directly above the table I filter on. Since I never do strip runs there is usually tiny oil slick floating on top of the of the liquid in the funnel which is easy to see under the light and in the black funnel. The oils can not dissolve in the alcohol because it is already cut so they float on top and if you smell the alcohol in the funnel they make it smell "unclean" so I just make sure the funnel never runs dry and before the last of the last drips into the bottle I pull the funnel and dump what is left. I noticed the tiny slick once while filtering and smelled inside the funnel and what I smelled was not clean so I took a straw and sucked out the oil slick and "presto" product in the funnel smelled 100% better in one second. A tiny bit of fusels in your neutral spirits will taint the whole bottle.
I am Canadian
ProfessorDuck
09/04/04 07:32 PM
Re: Redistilling new [re: Knuklehead]
In reply to:
Come back every 5 minutes (commercial break)
You have commercial breaks every five minutes?
Anyway, something I've been meaning to ask about is how do you stop the alcohol evaporating while you filter through a funnel? I was filtering some stuff a while ago, it started at 45% and came out at about 35%!
Knuklehead
09/04/04 07:52 PM
Re: Redistilling new [re: ProfessorDuck]
LOL, no we don't have commercial breaks every 5 minutes it just seams like it.
You will lose some alcohol content carbon filtering. I usually start my carbon filtering at 45% and by the time it is done it is down to 40% which is exactly where I want it. There is no possible way that you could lose 10% alcohol while filtering. My my guess it that you have your unfiltered bottle sitting somewhere warmer then 20C and when you start to filter it there will be some evaporation because the alcohol is slowly dripping and falling a ways to the bottom of the bottle which will have a great cooling effect on the product. So, the starting temperature of the product is higher then when you are done filtering this giving you a lower reading at the end of filtering. Shouldn't really make 10% difference, are you doing temperature corrections?
I am Canadian
ProfessorDuck
09/04/04 08:01 PM
Re: Redistilling new [re: Knuklehead]
Well I might have exaggerated a bit about the % difference, I don't really remember exactly what it was but I'm pretty sure it was at least 5%. I didn't make temp corrections, I guess that was probably a factor too.
______________________________________
Question reality...
Knuklehead
09/04/04 08:15 PM
Re: Redistilling new [re: ProfessorDuck]
Well 5% makes a lot more sense and temperature can easily effect your product reading by +/- 5%.
I am Canadian
gjbloom
09/05/04 06:08 PM
Re: Redistilling new [re: mshinner]
One way to boost the concentration and purity of your product might be to distill under partial vacuum. I imagine you could hang one of those 5-gallon buckets with a sealing snap-on lid full of water with a hose coming out the bottom to a collection bucket and a vacuum hose attached to the top and connect this vacuum hose to the output side of your collection bottle (which would now have to be connected to your still by vacuum-tight hose).
You wouldn't have to apply as much heat or cooling, since the vacuum depresses the boiling point. Depending on how high you hang your bucket, you can vary the vacuum (up until atmospheric pressure implodes the bucket). You'd probably have to pause the distillation every so often to refresh the vacuum water, and your collection bottle would need to be much better cooled, perhaps immersed in a water/salt/ice bath. I've seen graphs that show the ethanol fraction of the azeotropic mixture approaching 100% for vacuum distillation.
theholymackerel
09/05/04 06:38 PM
Re: Redistilling new [re: gjbloom]
Sounds like a logistical nightmare...
FourwayModerator
09/05/04 10:47 PM
Re: Redistilling new [re: gjbloom]
There's another method that I hear works rather well and has been in use for several thousand years with only minor improvements, it's called "distilling".
Gin was mother's milk to her. - George Bernard Shaw
rebel
09/06/04 04:24 AM
Re: Redistilling new [re: Fourway]
why would you want puriety past 95%? you have to water it down to drink it anyway.
make beer not war
MyDBear
09/06/04 04:28 AM
Re: Redistilling new [re: rebel]
I agree with ya reble. I guess its the idea of having something pure.
I would be happy if I get any thing from 80 to 90%
Edited by MyDBear (09/06/04 04:31 AM)
rebel
09/06/04 04:33 AM
Re: Redistilling new [re: MyDBear]
ya, I kinda understand the purety thing. I guess you could say "To each his own" lol
make beer not war
tater
09/06/04 10:13 AM
Re: Redistilling new [re: Fourway]
Fourway ive heard of that as well.Reckin a feller could learn how to do it simple then work his way up.
Theres more old drunks then there are old doctors
Knuklehead
09/06/04 12:07 PM
Re: Redistilling new [re: rebel]
Depending on what you are making the % collected at makes a huge difference. If you are making a flavored spirit like whiskey, rum and such you would not want to collect to this high a %. But....if you are making a neutral spirit then you want to collect as high as possible so that you collect only the smallest amount of impurities. When you get up above 90% each % makes a huge difference in the taste of the neutral spirit you collect. Yes you do dilute it down to drinking strength with distilled water which has no taste to contribute but if your ethanol smells and tastes off at its high % it will be worse after you dilute it.
I am Canadian
mshinner
09/06/04 08:54 PM
Re: Redistilling new [re: Knuklehead]
Well after 3 days off work and a whole lot of drinking.... all my friends say my stuff is the smothest they have ever had but it has a sweet taste to it, I have been making sugar washes with Gerts Turbo 8kg yeast, I am going to run it thru the still again diluted down with distilled water, run it real slow and see what it tatses like. I have tryed carbon filtering it helps but what a pain I sure would like to be able to skip that step. I let you know how it turns out in a couple days.
Knuklehead
09/06/04 09:12 PM
Re: Redistilling new [re: mshinner]
Are you leaving the heads of your run in with the main? If you say it has a sweet taste to it then you must not have kept the head separate. The heads of a sugar wash run will taste sweet and if you leave even a tiny bit of them in your main product it will all taste that way. For a 20L wash you will have at least 250ml of heads but use your senses to tell you when they are gone. Don't be greedy because if you don't want to use carbon then you will have sacrifice a bit to keep your main run clean.
I am Canadian
grayson_stewart
09/06/04 09:22 PM
Re: Redistilling new [re: Knuklehead]
Nothing wrong with drinking them from a sugar wash, but they will make it sweet tasting. Next run try taking 30% of your expected run as heads and keep it seperate, then use the heads to make a liquer with.
Good things may come to those who wait. But only the things left by those who hustle.
Knuklehead
09/06/04 09:29 PM
Re: Redistilling new [re: grayson_stewart]
Yup, that's exactly what I do. I make amaretto and Irish cream with the heads. Then I keep the main portion separate and just when I start to detect a change in smell again I start collecting the back part of my main run which I also don't want in the vodka. I use this for making Coffee liqueur.
I am Canadian
mshinner
09/06/04 10:11 PM
Re: Redistilling new [re: Knuklehead]
I have been keeping the first 300ml seperate, my next run I will keep about 750ml seperate and see how that tastes.
grayson_stewart
09/07/04 06:36 AM
Re: Redistilling new [re: mshinner]
Bokakob posted his cuts on one of the other forums once. I didn't really like the cuts he made because I was greedy with wanting to have more product from each run, but after being displeased with my wifes constant snubbing of what I made I finally gave in and started using his cuts.
Assuming 37 liters @ 18%You would have a theoretical yield of 6.8 liters.
Take 30% or 2.0 liters as a pretake or heads.
The first 200 ml of this pretake would be the foreshots and tossed or used to light your grill. I know alot of people say you don't need to take near this amount of foreshots for a sugar wash but if your really looking for pure it doesn't hurt. After removing the first 200 ml, the rest of the first 30% is set aside as the heads. Its a deep cut into the middle but it doesn't take much of the heads to give that sweet taste to your middle cut. You can take this portion to make liquers or place with the tails for you next run.
Middle cut for vodka is 40%.
This middle cut should be about 2.7 liters based on these numbers. If using a side head design you will need to pay attention to your temps as you get near the end of the 40% so that you can begin to back off the removal rate and increase reflux to maintain the highest purity.
Last 30% is the tails.
It's not cost efficient to get all 30% or 2 liters out of the wash, so this amount will vary by how much you want to retain to toss into the next run.
Making this cut schedule really work to your advantage depends on taking accurate initial and ending specific gravities of your wash and specific gravity readings of the heads/tails that you may be adding back. Once you know the amount of alcohol involved, the math is pretty simple and I think you'll be really pleased with the end product.
Good things may come to those who wait. But only the things left by those who hustle.
mogogear
09/09/04 08:09 PM
Re: Redistilling new [re: ProfessorDuck]
P D.
Are you sure the filter you were using did not already have a water charge in it ( left over from prior purging etc or flushing)?
You may have unintentionally " diluted " your spirit!!
mo
Usquebae for me!
ProfessorDuck
09/10/04 02:26 AM
Re: Redistilling new [re: mogogear]
I don't think so, but it is a possibility. It was new carbon I had just washed, so there might have been some water there but I don't think it was enough to make much difference.
______________________________________
Question reality...
mshinner
09/28/04 01:27 AM
Re: Redistilling new [re: mshinner]
Ran 3 and 1/2 gallons of 92% back thru the still diluted down with 3 galons of water. I made heavy cuts now I have 2 gallons of the tasteyest vodka I have every had. It took 15 hours to redistll and came out at 94%. I got back about 3 gallons.
09/03/04 01:32 AM
Redistilling
I now have 2 galons at 92% abv. I was thinking about running back thru the still to get it up to 95% and see if I could notice a differnce in the taste, should I add water and dilute it down before I run it? if so how much should I add if any? I have an external heat source (hot Plate)
ProfessorDuck
09/03/04 01:52 AM
Re: Redistilling new [re: mshinner]
My understanding is that you only ever need to add water to avoid exposing elements. Since you're not using an element, the answer is no.
Question reality...
LeftLaneCruiser
09/03/04 02:06 PM
Re: Redistilling new [re: mshinner]
From what i have read you should water it down to about 50%. This because of the danger of explosions inside your boiler.
I haven't tried redistilling a high proof wash myself, so no personal experience can be added.
KJH
Destillatori te Salutat
Knuklehead
09/03/04 06:17 PM
Re: Redistilling new [re: mshinner]
I have tried it and the only thing it did was make some of my product disappear with no real difference in the taste. You would be much better off to carbon filter it if you want to make it a little cleaner tasting then to run it again. Is your column capable of making 95%? If it is I would suggest making the necessary adjustments like refluxing more and do that on your next run. Put a cup of carbon per liter and let it sit for a week shaking it a few times a day if you can remember. Then a day before you want to filter it off the carbon put it in the freezer for a few hours. Then pass it through your filter and that I know will make a difference in smell and taste. If you want to redistill then you should do a strip run collecting everything fast so you end up with a product with a higher % then your original wash. Then do your reflux run.
I am Canadian
leglessboot
09/04/04 02:54 AM
Re: Redistilling new [re: Knuklehead]
That's a lot of carbon, what sort (cheapest if possible) would you use?. I have put a few grammes in with a litre or so. It's made for taking off flavours out of wine etc, comes in the form of pellets which disintigrate into a powder as soon as in solution trouble is it's expensive. Even in such a small quantity it makes a difference to the taste.
Another solution is to use the Turbo Pure type yeasts. They ferment a cleaner wash. Waiting for some to come in the post. When it does I'll report here on the results.
LeftLaneCruiser
09/04/04 05:13 AM
Re: Redistilling new [re: leglessboot]
A cup for one litre sounds a lot to me too, i would say a few spoonfulls ( 1-3 ) should do the trick.
The cheapest carbon treating of your distillate might be using charcoal, the same as you use for the barbecue. But as this is a lot less active than the activated you need more for the same result. As i have used this before i got some activated carbon i can say from experience that it works.
KJH
Destillatori te Salutat
Knuklehead
09/04/04 10:35 AM
Re: Redistilling new [re: LeftLaneCruiser]
Oh yea you are right it is a lot of carbon, lol. I use KC06 carbon which is "cleanable" so doesn't really matter to me how much I dump in there and carbon is a filter so the more the better, at least in my opinion. I paid around $12.00 for 1.7L bag so I don't find that so expensive since I can use it clean it and use it again. More carbon in the bottle means more surface area which means the filtering will be done faster. I use one cup of carbon, let it sit for a week shaking it a few times a day, then cold filter it out and it is nice and clean smelling and tasting. I have tried it with less but I had to let it sit longer and still didn't come out as clean as it does now so I just pile on the carbon . I'll tell you though, I have to run it through a filter for sure 4 times to get all the carbon dust out of it but I see it as being worth it.
I am Canadian
LeftLaneCruiser
09/04/04 12:45 PM
Re: Redistilling new [re: Knuklehead]
Doesn't filtering it four times take a huge amount of time?
just curious..
KJH
Destillatori te Salutat
Knuklehead
09/04/04 05:14 PM
Re: Redistilling new [re: LeftLaneCruiser]
Yes actually it does but its not like stilling. You can do it while you watch TV or read posts on this site or whatever its not like it is something you have to keep a close eye on. I have a large funnel and all I do is pop a cotton ball in the spout, place the funnel on the bottle and filler up. Come back every 5 minutes (commercial break) and filler up again. I filter like this until the cotton comes out without any carbon dust in it so 3 times would most likely do it, 4th time is just to make sure. Another thing I do on the last time through the filter is make sure the funnel never runs dry. I use a black funnel and there is a light directly above the table I filter on. Since I never do strip runs there is usually tiny oil slick floating on top of the of the liquid in the funnel which is easy to see under the light and in the black funnel. The oils can not dissolve in the alcohol because it is already cut so they float on top and if you smell the alcohol in the funnel they make it smell "unclean" so I just make sure the funnel never runs dry and before the last of the last drips into the bottle I pull the funnel and dump what is left. I noticed the tiny slick once while filtering and smelled inside the funnel and what I smelled was not clean so I took a straw and sucked out the oil slick and "presto" product in the funnel smelled 100% better in one second. A tiny bit of fusels in your neutral spirits will taint the whole bottle.
I am Canadian
ProfessorDuck
09/04/04 07:32 PM
Re: Redistilling new [re: Knuklehead]
In reply to:
Come back every 5 minutes (commercial break)
You have commercial breaks every five minutes?
Anyway, something I've been meaning to ask about is how do you stop the alcohol evaporating while you filter through a funnel? I was filtering some stuff a while ago, it started at 45% and came out at about 35%!
Knuklehead
09/04/04 07:52 PM
Re: Redistilling new [re: ProfessorDuck]
LOL, no we don't have commercial breaks every 5 minutes it just seams like it.
You will lose some alcohol content carbon filtering. I usually start my carbon filtering at 45% and by the time it is done it is down to 40% which is exactly where I want it. There is no possible way that you could lose 10% alcohol while filtering. My my guess it that you have your unfiltered bottle sitting somewhere warmer then 20C and when you start to filter it there will be some evaporation because the alcohol is slowly dripping and falling a ways to the bottom of the bottle which will have a great cooling effect on the product. So, the starting temperature of the product is higher then when you are done filtering this giving you a lower reading at the end of filtering. Shouldn't really make 10% difference, are you doing temperature corrections?
I am Canadian
ProfessorDuck
09/04/04 08:01 PM
Re: Redistilling new [re: Knuklehead]
Well I might have exaggerated a bit about the % difference, I don't really remember exactly what it was but I'm pretty sure it was at least 5%. I didn't make temp corrections, I guess that was probably a factor too.
______________________________________
Question reality...
Knuklehead
09/04/04 08:15 PM
Re: Redistilling new [re: ProfessorDuck]
Well 5% makes a lot more sense and temperature can easily effect your product reading by +/- 5%.
I am Canadian
gjbloom
09/05/04 06:08 PM
Re: Redistilling new [re: mshinner]
One way to boost the concentration and purity of your product might be to distill under partial vacuum. I imagine you could hang one of those 5-gallon buckets with a sealing snap-on lid full of water with a hose coming out the bottom to a collection bucket and a vacuum hose attached to the top and connect this vacuum hose to the output side of your collection bottle (which would now have to be connected to your still by vacuum-tight hose).
You wouldn't have to apply as much heat or cooling, since the vacuum depresses the boiling point. Depending on how high you hang your bucket, you can vary the vacuum (up until atmospheric pressure implodes the bucket). You'd probably have to pause the distillation every so often to refresh the vacuum water, and your collection bottle would need to be much better cooled, perhaps immersed in a water/salt/ice bath. I've seen graphs that show the ethanol fraction of the azeotropic mixture approaching 100% for vacuum distillation.
theholymackerel
09/05/04 06:38 PM
Re: Redistilling new [re: gjbloom]
Sounds like a logistical nightmare...
FourwayModerator
09/05/04 10:47 PM
Re: Redistilling new [re: gjbloom]
There's another method that I hear works rather well and has been in use for several thousand years with only minor improvements, it's called "distilling".
Gin was mother's milk to her. - George Bernard Shaw
rebel
09/06/04 04:24 AM
Re: Redistilling new [re: Fourway]
why would you want puriety past 95%? you have to water it down to drink it anyway.
make beer not war
MyDBear
09/06/04 04:28 AM
Re: Redistilling new [re: rebel]
I agree with ya reble. I guess its the idea of having something pure.
I would be happy if I get any thing from 80 to 90%
Edited by MyDBear (09/06/04 04:31 AM)
rebel
09/06/04 04:33 AM
Re: Redistilling new [re: MyDBear]
ya, I kinda understand the purety thing. I guess you could say "To each his own" lol
make beer not war
tater
09/06/04 10:13 AM
Re: Redistilling new [re: Fourway]
Fourway ive heard of that as well.Reckin a feller could learn how to do it simple then work his way up.
Theres more old drunks then there are old doctors
Knuklehead
09/06/04 12:07 PM
Re: Redistilling new [re: rebel]
Depending on what you are making the % collected at makes a huge difference. If you are making a flavored spirit like whiskey, rum and such you would not want to collect to this high a %. But....if you are making a neutral spirit then you want to collect as high as possible so that you collect only the smallest amount of impurities. When you get up above 90% each % makes a huge difference in the taste of the neutral spirit you collect. Yes you do dilute it down to drinking strength with distilled water which has no taste to contribute but if your ethanol smells and tastes off at its high % it will be worse after you dilute it.
I am Canadian
mshinner
09/06/04 08:54 PM
Re: Redistilling new [re: Knuklehead]
Well after 3 days off work and a whole lot of drinking.... all my friends say my stuff is the smothest they have ever had but it has a sweet taste to it, I have been making sugar washes with Gerts Turbo 8kg yeast, I am going to run it thru the still again diluted down with distilled water, run it real slow and see what it tatses like. I have tryed carbon filtering it helps but what a pain I sure would like to be able to skip that step. I let you know how it turns out in a couple days.
Knuklehead
09/06/04 09:12 PM
Re: Redistilling new [re: mshinner]
Are you leaving the heads of your run in with the main? If you say it has a sweet taste to it then you must not have kept the head separate. The heads of a sugar wash run will taste sweet and if you leave even a tiny bit of them in your main product it will all taste that way. For a 20L wash you will have at least 250ml of heads but use your senses to tell you when they are gone. Don't be greedy because if you don't want to use carbon then you will have sacrifice a bit to keep your main run clean.
I am Canadian
grayson_stewart
09/06/04 09:22 PM
Re: Redistilling new [re: Knuklehead]
Nothing wrong with drinking them from a sugar wash, but they will make it sweet tasting. Next run try taking 30% of your expected run as heads and keep it seperate, then use the heads to make a liquer with.
Good things may come to those who wait. But only the things left by those who hustle.
Knuklehead
09/06/04 09:29 PM
Re: Redistilling new [re: grayson_stewart]
Yup, that's exactly what I do. I make amaretto and Irish cream with the heads. Then I keep the main portion separate and just when I start to detect a change in smell again I start collecting the back part of my main run which I also don't want in the vodka. I use this for making Coffee liqueur.
I am Canadian
mshinner
09/06/04 10:11 PM
Re: Redistilling new [re: Knuklehead]
I have been keeping the first 300ml seperate, my next run I will keep about 750ml seperate and see how that tastes.
grayson_stewart
09/07/04 06:36 AM
Re: Redistilling new [re: mshinner]
Bokakob posted his cuts on one of the other forums once. I didn't really like the cuts he made because I was greedy with wanting to have more product from each run, but after being displeased with my wifes constant snubbing of what I made I finally gave in and started using his cuts.
Assuming 37 liters @ 18%You would have a theoretical yield of 6.8 liters.
Take 30% or 2.0 liters as a pretake or heads.
The first 200 ml of this pretake would be the foreshots and tossed or used to light your grill. I know alot of people say you don't need to take near this amount of foreshots for a sugar wash but if your really looking for pure it doesn't hurt. After removing the first 200 ml, the rest of the first 30% is set aside as the heads. Its a deep cut into the middle but it doesn't take much of the heads to give that sweet taste to your middle cut. You can take this portion to make liquers or place with the tails for you next run.
Middle cut for vodka is 40%.
This middle cut should be about 2.7 liters based on these numbers. If using a side head design you will need to pay attention to your temps as you get near the end of the 40% so that you can begin to back off the removal rate and increase reflux to maintain the highest purity.
Last 30% is the tails.
It's not cost efficient to get all 30% or 2 liters out of the wash, so this amount will vary by how much you want to retain to toss into the next run.
Making this cut schedule really work to your advantage depends on taking accurate initial and ending specific gravities of your wash and specific gravity readings of the heads/tails that you may be adding back. Once you know the amount of alcohol involved, the math is pretty simple and I think you'll be really pleased with the end product.
Good things may come to those who wait. But only the things left by those who hustle.
mogogear
09/09/04 08:09 PM
Re: Redistilling new [re: ProfessorDuck]
P D.
Are you sure the filter you were using did not already have a water charge in it ( left over from prior purging etc or flushing)?
You may have unintentionally " diluted " your spirit!!
mo
Usquebae for me!
ProfessorDuck
09/10/04 02:26 AM
Re: Redistilling new [re: mogogear]
I don't think so, but it is a possibility. It was new carbon I had just washed, so there might have been some water there but I don't think it was enough to make much difference.
______________________________________
Question reality...
mshinner
09/28/04 01:27 AM
Re: Redistilling new [re: mshinner]
Ran 3 and 1/2 gallons of 92% back thru the still diluted down with 3 galons of water. I made heavy cuts now I have 2 gallons of the tasteyest vodka I have every had. It took 15 hours to redistll and came out at 94%. I got back about 3 gallons.