Can you or do people run an injection coil in a di slurry with a room temp tank?
I was wanting to run cold without nitrogen. Is that a proper way? I’m assuming since theres pressure in the solvent tank it will push it through.
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yes, your coil will just need to be a little longer.
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that’s how I run but I feel like even with 60’ of coil Im not getting that cold
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Really? Why?
because they don’t have a thermal probe so they can’t know?
@Codemanmakeshash, not dissing your setup…just needed to make the point that the more data you have the better off you are.
I had a “consultant” come over and run bucket tek while I was out of town this week (using my Ace15 as a panda after dunking!)… they told the client that the solvent they’d left buried in dry ice over night was at -80C.
…but they were just guessing because they didn’t use a thermometer.
I checked the stuff that had been in there for 3 days and it was at -40C…because without liquid in with the dry ice, there is F-all in the way of thermal transfer
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I use to have a 75’ coil sealed in an igloo container for injection and it worked great. But if its cold enough it wont move unless your pump is running or i would use my multiple honey pots that were still under vac to pull the solvent thru before turning on pumps
Know any cheap -80℃ thermal probes and readers?
Unfortunately I’ve tried two of the less expensive options and am not currently prepared to recommend either.
This should get you to -50. I don’t recall if they go lower. you can buy k-type probes from $5-50 that will work with it.
https://www.harborfreight.com/11-function-digital-multimeter-with-audible-continuity-61593.html
Edit: I’m currently not impressed with the last 4-probe reader I purchased…but I haven’t ruled out “minions dunked contacts in cannabinoids while I was gone”… or $10 probes purchased separately are BS.
I was pretty happy with it a week ago…
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How would you go about fitting that to directly probe the temperature of a fluid coming out of a coil? I’m thinking on an NPT Tee
1/2🥄
first response is: how does BizzyBee do it?
there are compression fittings that are designed explicitly for thermocouple ingress that are probably the answer to that question.
https://www.google.com/search?q=thermocouple+fitting
@Soxhlet & @Indofab could place one wherever you want.
edit: you can also npt them into all sorts of places…
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yeah, I’d be happy with a Fluke too 
does it qualify as inexpensive?
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That would depend on who’s buying it. 
It does work as advertised. I bought an optional wire probe that can be fitted to a compression style fitting.
Running pump to build more pressure in solvent tank? Like recover to add more pressure. Right?
No, warm solvent, DI slurry with a coil in it. Warm tank = high pressure. Cold coil = Cold solvent injection. Pressure from warm tank pushes solvent thru the coil and into the column. As long as his column stays cold he should be good.
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You’re right I’m just guessing but my chiller on my columns bottoms out at -23c and after doing a very slow injection through 60’ of coil in di/iso it doesn’t help bring that temp down a single degree so that’s what I was basing my assumption off of that could be completely wrong.
That and to push also
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A tee would work, I would add some sort of thermo well to it to get the probe as close to the process flow as possible.
For ethanol I use the compression style thermocouple adapters.
For hydrocarbons I’m not so sure.
I’d probably suggest a thermowell…
Guess that’s what pressure testing is for
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So I’m planning on a run like this in the near future.
1 question I have is once I close the valve on my solvent tank, how do I get the solvent left in the coil into the column?