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https://graywolfslair.com/index.php/diy-cannamed-production/9-4-extraction/9-4-7-ethanol-extraction/9-4-7-1-qwet

Optimum temperature is a good question. I've controlled the material temperature, but dry sieve at local indoor ambient, which in the summer is typically in the 60's to 80's, but has hotter spikes. Harvest is typically in the late fall, so indoor temperatures is a pretty uniform 68F during...

Graywolf's Lair is @: https://graywolfslair.com/index.php The QWET article is at: https://graywolfslair.com/index.php/diy-cannamed-production/9-4-extraction/9-4-7-ethanol-extraction/9-4-7-1-qwet

https://graywolfslair.com/index.php/16-commercial-equipment/16-2-equipment-tests/16-2-1-extract-craft-source-turbo https://graywolfslair.com/index.php/16-commercial-equipment/16-2-equipment-tests/16-2-7-field-testing-the-medxtract-essential...

Wait to pull full vacuum until more of the alcohol is gone. I bring it up to heat and then start vacuum. When the boiling becomes too intense, I back off until it calms down and then proceed again until I reach full vacuum.

It might well be the dealbreaker. A phone call would put it in perspective. https://apis-labs.com/

For those so inclined Good for you! Here is a link to an article that includes the machining prints and wiring diagram for rosin plates: https://graywolfslair.com/index.php/diy-cannamed-production/9-4-extraction/9-4-4-rosin-extraction

The beige liquid that you get when evaporating away the alcohol from an alcohol extraction is a mixture of water, alcohol, and aromatic hydrocarbons.

The picture looks like precipitated plant wax. Have you checked the consistency to see if it is waxy?

Apis Labs offers ethanol with heptane, which is pretty standard in our industry and would be an excellent choice of vendors if they are close enough that shipping costs aren't an issue. They are the vendor I used with WolfWurx and turned our customers on to.

We went after the trichomes on stems and fan leaves a little differently, but they tend to be more mature than the trichomes on the buds and sugar leaf, so the effect is different...

About $8 per Liter https://graywolfslair.com/index.php/10-the-alchemist-resource/10-19-190-proof-ethanol-from-scratch https://graywolfslair.com/index.php/15-diy-equipment/15-8-ethanol-fractionating-still/15-8-1-refluxing-columns-for-producing-190-proof-ethanol

It will drop the temperature in minutes, and does put out a fog. You can also bury the alcohol container in the dry ice beforehand to cool it down.

I don't see how -80C would damage the freezer but might be hard on the seals opening and closing it. Consider a cheap heavy Styrofoam cooler.

Bingo!

-28.5" Hg is usually low enough for vacuum filtration, but not for evacuating a chamber prior to BHO extraction or post-extraction purging. A two-stage vacuum pump will typically pull under 5 microns and -28.5" Hg is about 36,000 microns.

Yes.

I freeze my material in a -18C/0F freezer and put the dry ice into the alcohol to cool it down before and during extraction. With LPG I run it through heat exchangers that are either in an alcohol/dry ice bath, or through a counter flow heat exchanger with LN2 on the cold side.

Good point. A coffee filter and a #1 lab filter are in the same micron range at 15 to 25..

You can pull -28.5" Hg vacuum using a faucet aspirator pump to save money on the pump part.