Help with inline dewaxing chamber size

KLITE said:

Hi all

If material column has a volume of approximately 4000ml without reducers would an inline dewaxing chamber with 2000ml of volume suffice?

thanks

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I thinking not. Certainly not if you do a three volume extraction.

If you ASSume around 70% liquid space left in a packed column, that is around 2800 ml, and if you do a three volume flush, that's 8400 ml.

Dewaxing chamber design makes a big difference in how long a residence time is required to drop the temperature so that the waxes precipitate. A tube and shell heat exchanger for a dewax chamber, was the fastest method I could come up with.

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KLITE said:

So ideally youre saying the around 70% of the volume of the material column times 3 is the ideal amount of liquid solvent to use?

I also was thinking it was a bit small... So you believe for 4000ml column an 8000ml dewaxing chamber should do the trick?

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I use color to judge when to call it good, but on average it is about three volumes with fresh bud. Trim can be much less, depending on quality.

8000, or there where abouts. 4000 X 3 X .7= 8400.

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KLITE said:

Thamn bro thats a fair bit of solvent for spanish standards lol Believe it or not 2.5kg of 99.9% nbutane cost just under 400 euros. And you gotta pay another stupid amount for renting the tank it comes in.
I also bet running that much gas passively would take way too fucking long, right? Seems like a smaller material column needs to be gotten...

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With a closed loop system, the butane lasts a long time, but I prefer to not run anything larger than a 4X36 column, and something the size of a Mk III with a 1 1/2 X 24" column can serve all my personal needs. Unless it was cart mounted, I wouldn't want to manually horse around anything larger than a Mk IV with 4X24" column, which can handle a couple of pounds.

A passive system built right can be pretty fast. I saw one with massive heat exchangers running -15C coolant, that could recover a pound a minute.

I prefer an active system for its versatility, but the WolfWurx Mk IVC/VC's could be run passively or actively with the turn of a couple valves, and adjustment of the PID's.

If you build it right, you can always start at a minimum and add to it later. You can also custom build it to operate on what is available to you at your location.

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KLITE said:

Thanks man, I suppose you can always upgrade your columns later if needed. You defo given me great insight on the chamber volumes, much appreciated.

For a material column 4''x24'' how wide would would you make your filter plates? Im thinking 4'' oughta do the trick. We also got a lab supplier that is able to specifically design different types of silter to our liking with all kinds of different characteristics. Anything in particulat you think could be interesting to try?

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I don't use filter plates, I use a 4" X 8" 1 micron polyester felt sock filter. I get them from Dudda Diesel, where they use them for biodiesel.

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KLITE said:

Thamn, lkast thing id expect! where in the system do you put it then? And why such a peculiar filter?

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The case has a triclamp fitting top and bottom, so it clamps between the dump valve and the collection pot on a Mk IV/V Terpenator or between the soak shell and tube dewaxing heat exchanger on a Mk VIII, and the collection pot.

I like them because of their filter area, which I've never had clog, even at 1 micron.

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KLITE said:

Great design! I bet itd be virtually impossible to clog such a huge surface area. Moreover the principle makes more sense to me than passing through diminishing filter meshes, kinda like ''brewing'' coffee the old way. Should the spool where the filter sits be a dewaxing one too in order to mantain cold solvent temperature during filtration?

Thanks for help

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The filter case has a cooling coil around it, though which -15C coolant is circulated,

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The spool has a ring welded in it that the vee ring at the top of the Dudda Diesel 4 X 8" sock filter sits on top of and the UHMWring on the lid presses against it, holding it in place.

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the vee ring at the top of the Dudda Diesel 4 X 8" sock filter

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KLITE said:

Thanks so much for the help youre dedicating.
Man in so sorry, im afraid either laguage or my idiocracy is getting on the way, i cant quite decipher what you are explaining. I shall show it to a couple of native speakers see if i can comprehend it better, not quite grasping it.

Is something on the top end cap of the filter spool? I think i see it in one of the schematics... thamn it must be so simple and im not seeing it

Would you think holding the sock filter in place with a ring that would kinda fit tight inside spool, or a mesh as i said, be too ''ghetto'' to hold in place under vacuum and subsequent flooding of solvent at high pressure?

thanks man

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Sock filters come with a choice of sealing rings, usually either just a ring sewn into the inlet hem, or a molded plastic seal ring with a Vee cross section, that fits over a lip in the filter holder and is held in place by pressure from above.

My design is the latter, designed around a sanitary spool, but Sweetleafs built from scratch design wedges the simple ring in place and works well.

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KLITE said:

Thanks, man. I supose my ghetto invisionement will hold up. Man i was dead close to ordering a system with filter plates, pretty sure youve saved me a lot of hassle, tnx a ton and half!

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