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. Cheap homemade aspirator bottle/sep funnel for A/B extractions

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#1 Defiance



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Posted 26 January 2008 - 05:32 PM

If you're doing an A/B extraction you already know, turkey basters and freeze separation both suck. The basters leak and occasionally the bulb dissolves, and with freeze separation of solvents and water some of the solvent is always brought over to your evaporation tray and ends up in your product.

Sooo, with that in mind I give you the plans for my ghetto aspirator bottle/sep funnel. Although I've moved on to glassware and poly aspirator bottles this tek has served me well for a long time. Here goes.
First gather your equipment. For the aspirator bottle you're going to need a short length of standard aquarium air hose, a 20oz soft drink bottle and top, sharp scissors, an empty spore syringe, a soldering iron, and some Liquid Nails or equivalent adhesive (Not pictured here).
The first thing you'll need to do is liberate the tip of the syringe from the barrel. Remove the plunger and cut down the side of the syringe with your scissors.
Then cut around the barrel, leaving just the tip and a surrounding plastic lip.
Set the syringe end aside and (Carefully!) hot knife a hole in the bottle cap as close to the diameter of the syringe tip as possible.
Apply adhesive around the lip of the syringe tip and slide it through the bottle cap, pushing it firmly in place. Try not to use so much adhesive that it smooshes out around the outside of the syringe lip and all over the inside of your cap, although if you use Liquid Nails I have confirmed that Xylene and naptha won't dissolve it - if you use a different adhesive you're on your own though.
Let the adhesive dry - preferably overnight - and attach your length of aquarium tubing. Hold your finger against the syringe tip on the inside of the bottle cap when you push it on to minimize stress on the adhesive joint.
You can then screw on the bottle lid with the tubing attached and squeeze the bottle. Let off to suck solvent up the tube. It should be noted that it's a grand idea to *test that your solvent won't eat the tubing*. That could majorly ruin your day and extraction. You might have to work the sides of the bottle, squeezeing it back into cylindrical shape to get as much solvent as you can in each pass. Lift the tube out of your solvent and squeeze again until you've either got all of your solvent or the bottle is 2/3 full.

There you go, one aspirator bottle. You can either reverse the process to fill your sep funnel and salt out your alkaloids, or if you aren't lucky enough to have a beautiful separatory funnel you can use your aspirator bottle as one with a few small modifications.
To convert your aspirator into a sep all you need is another small length of aquarium hose and the plastic clip from a bag of bread. Just take the bottle cap off, remove the longer aspirator hose and attach the shorter sep hose. Now is a good time to add the water/acid to your bottle with a small funnel or steady hands.
If you lay on your side you'll see how I attached the bread bag clip to hold the short length of hose closed.
Once again on your side you'll see that I used a ring stand and 3-finger clamp to hold the bottle upside down. You can also do this with your hand.
Release the clip and allow the liquid to drain. This step can be tricky without a stand because you'll need to gently squeeze the bottle. As the water drains a vacuum will begin to form in the bottle, significantly slowing the flow. A trustworthy second set of hands is helpful here, but a ring stand won't tell the cops what you're doing in the basement. As the last of the water drains off you should stop squeezing and invert the bottle. Remove the cap and empty the solvent back into your jug for another pull.

There you have it guys - quick, cheap and easy. Thanks to Keith for the pictures.


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  • whatchamacallit and Frequency like this

#2 Defiance



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Posted 26 January 2008 - 06:13 PM

Haha, one of you friendly mods want to run a quick spell check on the thread title? Yeesh.

#3 Hippie3



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Posted 26 January 2008 - 06:51 PM

archive material

#4 vinz



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Posted 26 January 2008 - 10:40 PM

great idea you got there!
i agree w hip
this is awesome!:bow:

what kind of soda bottles did you use?
what kind of plastic is that?

#5 Defiance



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Posted 26 January 2008 - 10:43 PM

Thank you for the kind words.

It's a Faygo bottle, but pretty much all plastic soft drink bottles in the US are made of PET. Just about anything should work as long as you test it by dumping a bit of solvent in it first and watch to make sure the plastic doesn't turn from clear to cloudy - that's the first sign of melting.

#6 Delafonze19



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Posted 27 January 2008 - 07:01 PM

Dude that is almost identical to the setup my friend uses and has attempted to describe. The only difference is your pics have the syringe nozzle. My friend just put a hole in the cap and inserts the tube. This is held in place by high temp hot glue, but the hole is snug enough that it is not nessicerry. He uses it as a syphon to pull fuel off the top. If he were to do an acid extraction from that point he would put a rubber glove on and use his finger to control flow.

#7 real_psily


    electron pusher

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Posted 27 January 2008 - 09:00 PM

That is perfect for defats!!!! I hate cleaning the sep funnel between defats so disposables work great. Much cooler than my getto defat apparatus:eusa_clap

#8 CoyoteMesc


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Posted 27 January 2008 - 09:36 PM

Nice lil funnel man, great job...

#9 w.i.s.c.



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Posted 28 January 2008 - 08:35 AM

exactly what afoaf of mine will be looking for. thanx a huge amount, defiance... thix rawks.

#10 Nightwind


    Tohunga Toa

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Posted 05 April 2008 - 06:23 PM

I made one just about the same,
and it works fine.

#11 Frequency


    Code Demon

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Posted 19 July 2009 - 04:27 AM

I had to bump this thread. :eusa_clap Absolutely fantastic idea! Did this ever make it's way into the archive? Definite clandestine pwnage being witnessed.

#12 whatchamacallit


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Posted 19 July 2009 - 11:23 AM

Excellent contraption!!! This is the kinda thing SWIM loves to see!! He's always made his own makeshift devices for extractions so he can easily dispose of all the tools when finished, rather than have an equipped lab and evidence of any of his illegal activity laying around. Major rep for this one, Defiance!

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