Isopropyl Alcohol 99.9% (Suitable for extraction?)

MimiEMU

Active Member
Is there any news on the completed RSO V2 shop manual? I appreciate your work on this project, excellent info in your documentation.
Howdy, I've been slowly working on things, hadn't heard any interest. So now, you've kicked me in the butt to get this out the door. Sorry for the lag. :D
 

Nrk.cdn

Well-Known Member
Howdy, I've been slowly working on things, hadn't heard any interest. So now, you've kicked me in the butt to get this out the door. Sorry for the lag. :D
You have been compiling some excellent processes to create top shelf concentrates. The best part is the low ethanol requirement.

Question: the 120 micron milk bags are suggested during the wash, are 160/200 micron ok as well? The material that makes it thru will get removed at silting process?
 

MimiEMU

Active Member
You have been compiling some excellent processes to create top shelf concentrates. The best part is the low ethanol requirement.

Question: the 120 micron milk bags are suggested during the wash, are 160/200 micron ok as well? The material that makes it thru will get removed at silting process?

Yea, those will work fine. This allows the trichomes to pass through the bag and into the wash. This gives the trichomes extra soak/dissolve time. And yes again; the empty shells will be filtered out during Siting/Winterization.
 

Nrk.cdn

Well-Known Member
Howdy, I've been slowly working on things, hadn't heard any interest. So now, you've kicked me in the butt to get this out the door. Sorry for the lag. :D
What 1 piece of equipment would you choose for distilling (no recovery), collecting and reducing? Mini crock pot, rice cooker, coffee warmer, heating mat, 1 hot plate burner? I know the temps are important for consistency.
 

MimiEMU

Active Member
Howdy, Sorry for the lag, I'm retired, says it all..

For no alcohol recovery, a 3 & 4 quart pots on a hot plate. The distilling video shows the pots I use. 3 quart stainless steel mixing bowls will work too. Just make sure the top pan can fit and float in the bottom pan. This is my goto setup when the volume of isopropyl is not worth the trouble of recapturing. Controlling the temperature has been pretty easy. The magic is pairing the volume of liquids and the BTU output of the hotplate. I normally bring the bottom pan to a boil, then power down to the lowest setting and place the second pot on the boiler. At this point, the hotplate is only putting out X number of BTUs so it can only heat up so much water. My hotplate puts out 120,200,300 watts on the lowest three settings. Using this setup, I can easily keep the temperature at around 180f. The 2nd phase of distilling can be run on the lowest setting to maintain the temp. The bottom pan normally runs 10-20 degrees higher than the top pan so the water does evaporate off and may need some added to keep the volume of liquid constant. I did a distillation keeping the temp around 150f to save acidic CBD and it worked by having a larger volume of liquid to the same setting of the hotplate. This was all done empirically, I didn't calculate the exact BTUs and water volume to make it work. The boiling point of alcohol does help maintain 180f as it dissipates heat with the vapor. The temp will stay if there isn't excess BTUs being pumped into the boiler. You don't want to let the temp rise to 190 or above. Proteins go through a Salting-in/Salting-Out process at temperatures above 190f. This causes the proteins to unfold and expose non-polar undersides that collect oil. This is the problem with classic RSO being boiled down. The proteins turn gritty in the oil and burn.

For alcohol recovery, an Alcohol Still on a hotplate is my goto setup. Stay away from water distillers, they run too hot. With a still, you pour in your solution, power all the way up and watch the temp gauge. Once it hits 150f, its heading fast to 180f, the boiling point of Isopropyl. Once at 150f, turn down the power to 300 watts and the temp will hold at 180f for 95% of this "Spirit Run" (Moonshiner term..). You can capture 95% of the alcohol at 91% (Ethanol at 95%). Once the temp starts rising, there's very little alcohol left, so this starts the 2nd phase. You can power down to the lowest setting for the next half hour. Ethanol, you have to drive all the way to 212f to remove it.

Oh, the Shop Manual is coming along, getting close to done..
 

MimiEMU

Active Member
Oh, just thought of this. Make sure you use stainless steel, not aluminum. Aluminum dissolves in hot brine. There's no reason to use anything else, stainless steel is easy to acquire at Thrift stores, Goodwill, etc.
 
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