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Evaporation Efficiency

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clamshavefeelingstoo

clamshavefeelingstoo

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My anonymous penpal from Russia tells me she's been having difficulty with evaporation. She used odorless mineral spirits for the initial A/B, but cannot seem to evaporate the 300ml of solvent down (it's in a jar with a 6inch diameter). She used a brand that touted its purity and ability to evaporate 3x slower than turpentine (for the safety of the artist in mind), so obviously evaporation will be tough. However, after 24 hours in a small room's windowsill, with the window open (40degreesF outside), a fan blowing towards the window, inside a 100-120degreeF water bath (crockpot)... a very small, IF ANY, amount has evaporated (a line was marked and checked for reference).

She would like to know how to boost evaporation efficiency. Should a dish with more surface area be used? Should the window be closed if it is too cold outside? Should the air be circulated?

Apologies for making a new thread, but I could not find reasonable answers for her question elsewhere.

Thank you kindly for your help.
 
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en.wikipedia.org

White spirit - Wikipedia

en.wikipedia.org en.wikipedia.org

The kind she used is exactly as pictured in the article. The MSDS claims 100% purity. She decided to use this instead of naphtha because it didn't leave a residue, when naphtha did.

Now that I read a bit more, though, it claims OMS is less flammable. Perhaps I should tell her to use a hairdryer on it.
 
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I only have experience with ordinary mineral spirits- aka UK white spirit- and odourless kerosene.They evap, but you're talking weeks, even with gentle bottom heat.Be careful; less inflamable is all well and good but with a 'wick' of some sort that stuff will torch up like the best of solvents.
 
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Okay, my penpal took my advice and told me that she put a large circular glass pyrex dish on top of a crockpot full of water set on high (with two strips of rubber between to vent). There's a fan going and the window is open. She marked the dish and will tell me how far it gets her over 24hrs.

BTW, she told me she tried some 5-meo-dmt and it was fucking WEIRD. :shock:
 
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My penpal severely messed up. She put the crockpot on high and left it overnight! The temp in the water was 160F! By morning, all that remained was a orange-red oil!! Perhaps all is lost, and the molecule escaped into the air. :cry:

She's hoping to further extract from the rootbark, because the NP only held two pulls. Let this be a lesson to you.
 
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I wouldn't give up on the orange oil just yet. I would do a quick rextalization on it. Not really sure about OMS but I imagine that a supersatured solution will freeze precipitate something. Use 10-20ml of hot spirits, redissolve the orange goop and stick it in the freezer.
 
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Well, to my understanding, she intended to evap at least 50% off first before (CFC) freeze precip.

She is in the process of rexing and will provide yield/results from the chunky red/orange residue.
 
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Update: (Thanks acolon for the reassurance!)

Redissolved in OMS, she did a shotglass recrystalization twice in one session for decent purity. The 20ml of solvent was left to form crystals, then a freeze precip was done. The excess solvent was set aside for evap. The rice-like crystals are still drying to this day. A yield will be measured when they're dry. She cannot eyeball anything to report, because this is her first extraction.

She doesn't like the OMS for the long evaporation wait time, but so far it seems to be working. If a low yield occurs, it could be either from evaporating over a high-heat source (and some of the spice dissipated), or the short NP-base extraction time (two pulls, less than 20 minutes swirling, heated slightly).

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Obviously there were still a few drops of water contaminates that will require cleaning. She told me she was thinking of an ammonia wash then.
 
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The post-rextalization yield was just about 150mg from 125g bark. Does anyone know why this is?

She sees a few potential problems with her process.
1 - Not high enough pH during basification - she didn't know if she was reading the pH papers correctly, and just stopped basifying after it turned black & soysauce-y
2 - Not a long enough/not enough acid soaks - There were two soaks done, one overnight and the other almost all day with a crockpot on low
3 - Not a long enough/not enough NP pulls - Two pulls were done, while the solutions were heated in a bath. The pulls were mixed for less than 20 minutes.
4 - The evaporation was harsh - She left the OMS to evap on top of a crockpot that was on high overnight, and all solvent was gone by morning. Was it burned?
 
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I find that even after 3 crockpot acid cooks there is still A LOT left in the bark.

Lower the pH to ~2, and do another 2 long cooks.

Another option is to take the plant material and proceed with a STB extraction. That will get out the rest of that spice.
 
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