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Old 05-18-2011, 01:51 PM #1
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BHO Safety aka "Please don't immolate or blow your self up!"

Hi ya'll! Have ya'll been watching the folks blowing themselves and their homes up using butane extraction techniques, thus leading you to believe that such an attempt is suicidal?

Thank Gawd (Great Spirit) that paying attention to details reduces the odds to limits that you might embrace, after being thus enlightened. May we discuss, before you give up all BHO extraction attempts in difference to your family and home?

Clearly Butane is inflammable and can be explosive, if confined in a small space and supplied with about 1.86 to 8.41 percent butane to atmospheric air content and an ignition source.

In addition, ignition sources come from a number of different unexpected sources, so let's discuss that issue.

For starters, I never personally do a butane extraction indoors or any confined space! None at all, zero, zip, forget about it! It is important to keep it below explosive limits!

I do it all outdoors, with a non sparking plastic fan blowing, not sucking, the butane evaporation away! Butane loves self abuse and will clump together and pool, being that it is heavier than air.

I use three fans to keep any free butane dispersed below ignition limits of 1.86% and from it pooling and accumulating in low spots like through my basement window to my basement, chock full of ignition sources.

The central point is that concentration of the butane boiling off can be kept diluted below combustion limits, by blowing the accumulating vapors away using a fan.

Secondly, let's talk about stupid ignition sources. Despite previous discussions, I have literally grabbed the hands of cigarette smokers poised to light a cigarette while extracting. What can I say about addicts whom go on automatic pilot and forget where they are? Leave your cigarettes and lighter elsewhere

Lose the lighter and cigarettes (bong?) if you are an addict! Once the pin is pulled on a 5 second grenade, it is not your friend!

All pretty simple, but lets talk about subtleties! How about sparks?

Starting simple, dragging your feet on concrete, if you have gravel in your shoes can create a spark.

Wearing plastic clothing, especially socks, can also build up and discharge a static electricity spark.

Unless it is an explosion proof fan, always blow, instead of suck the vapors away, not only for efficiency reasons, but because the sparks from an electric motor slip ring can ignite the vapors.

Always use plastic or other spark proof blades, because a grain of sand can spark when hitting a steel blade, and be propelled into the concentrated vapors.

Always keep a fully charged and recently inspected fire extinguisher on hand. Shit sometimes happens and less shit is better, as I see it!

Never had to use one at home, though I have in industry, but they can't be beaten when they are called for!

If you get inadvertently sprayed with butane, stop, and go change clothes. Immolating as I sees it, is highly overrated!

Keep a blanket on hand, and if you do get unexpectedly ignited, immediately wrap yourself in it to extinguish the flames.

The good news is that none of the above has ever happened to me, but then I do pay close attention and try my very best to avoid it.

Ohmmmmmmmmmmmmmmmmmmmmmmmmmmmm mmm!!!!!!!!!!!!!!!!!!!!!!!1
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Old 05-18-2011, 02:05 PM #2
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What about a 2 car garage with 1/3rd open so not to let neighbors view whats going on inside but with a 16 in axial fan blowing from the back towards the front? Will the butane pool downwards and be blown out of the garage or will it have a chance to accumulate? I only do 300ml extractions at a time with never really more than an oz of material. Usually i end up with around 3-3.5gs when using bud, don't take too much time to scrape everything and get exact measurements, its all for me anyways. Also I don't do a 2nd run, well with butane, but rather qwiso the leftovers and then use that oil in my cooking. Any tips on how much qwiso to butter? I got around an eigth left over right now and was either going to make a batch of brownies or coffee cake today. Sorry this post went from bho safety to cooking questions i can move it to cooking forums if necessary, feeling enlightened on my day off so far -basket
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Old 05-18-2011, 03:14 PM #3
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What about a 2 car garage with 1/3rd open so not to let neighbors view whats going on inside but with a 16 in axial fan blowing from the back towards the front? Will the butane pool downwards and be blown out of the garage or will it have a chance to accumulate? I only do 300ml extractions at a time with never really more than an oz of material. Usually i end up with around 3-3.5gs when using bud, don't take too much time to scrape everything and get exact measurements, its all for me anyways. Also I don't do a 2nd run, well with butane, but rather qwiso the leftovers and then use that oil in my cooking. Any tips on how much qwiso to butter? I got around an eigth left over right now and was either going to make a batch of brownies or coffee cake today. Sorry this post went from bho safety to cooking questions i can move it to cooking forums if necessary, feeling enlightened on my day off so far -basket

Good question and the answer is that I don't know without looking at the setup.

Walls to guide exhaust and makeup air are not a bad thing, but it comes down to CFM in relation to area and volume of butane, or "surface feet" air movement to calculate dilution.

Ignition sources are also a key issue. Any furnaces, or hot water tanks in the garage?

Can un-dispersed butane pool or accumulate at a lower elevation, like the crawl space or basement? Any ignition sources there?

I deeply understand privacy, and use a popup canopy in the rear courtyard to shield my operation from the second story windows of adjoining neighbors and besides a fan to keep fumes away from my kitchen doorway and basement window, I cut a hole though the bottom of the gate from the courtyard, and installed a centrifugal blower to constantly evacuate the courtyard at ground level when I am extracting.

In my simple minded dotage, I have come to realize that sometimes shit happens, but not very often to the observant and prepared, as opposed to the oblivious and uncaring.

Best to look around up front and first eliminate obvious sources of disaster, and then prepare yourself for the very worst, if you are going to handle inflammables.

Without them civilization would be without fire in the pre stone age, and it is by our controlling their capabilities, in concert with paying close attention when using them, that we have tamed them to our bidding.

On the one side they nourish our very own evolution and on the other side, you must pay attention when using them, to remain in the gene pool.

After minimizing my liability, I often set off my worst nightmare by igniting a boiling pot of solvent, just to see what really happens.

Not all that exciting with ethanol, but more so with Isopropyl and Methanol, and even more exciting with butane.

I never do that in an area that I am not confident will survive the possible air burst concussion and flames, so may I suggest that you use that as your standard when you select your extraction location and ventilation?

What is the very worst thing could happen, and how can you gracefully walk away from it without blowing anything up, or burning it down?
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An age is called Dark not because the light fails to shine, but because people refuse to see it.

Believing is seeing and ignorance is bliss until it bites you in the ass!

Fervor is the weapon of the impotent. The harder the sell, the poorer the product.

Alas, my ignorance abounds; the more I've learned, the less I know that I know..........

Thou shalt seek and respect the opinions of operators, even unto the third helper, for theirs is a wisdom unknown to technicrats.

Wise men learn more from fools, than fools from wise men.

In my dotage I finally discovered that the secret to putting on pants both legs at a time is sitting down.
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Old 05-18-2011, 03:42 PM #4
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The only sources of ignition are electrical outlets in the walls and the only point I have concern about is the chance of butane drifting backwards(even though I have a fan pushing towards a semi-open door, and since butane is heavier than air I've just figured it goes down and out) then down through small spaces between the garage foundation and then leaking into ceiling of basement. Like I said before I only run 1 can at a time so not too actual quantity to build up vs people blowing through cases at a time. Garage has decent ceilings 16-20ft. Could I just measure the cubic space and figure out how high the maximum % concentration in my available area could reach? Thanks again for the help
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Old 05-18-2011, 04:25 PM #5
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The only sources of ignition are electrical outlets in the walls and the only point I have concern about is the chance of butane drifting backwards(even though I have a fan pushing towards a semi-open door, and since butane is heavier than air I've just figured it goes down and out) then down through small spaces between the garage foundation and then leaking into ceiling of basement. Like I said before I only run 1 can at a time so not too actual quantity to build up vs people blowing through cases at a time. Garage has decent ceilings 16-20ft. Could I just measure the cubic space and figure out how high the maximum % concentration in my available area could reach? Thanks again for the help
No spark from an electrical outlet, unless you plug in or unplug a load.

Too many varibles to answer without looking, but in general, if you are close to the door opening and blowing the butane away as it boils off, discharge from a 300ml can won't build to explosive levels.
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An age is called Dark not because the light fails to shine, but because people refuse to see it.

Believing is seeing and ignorance is bliss until it bites you in the ass!

Fervor is the weapon of the impotent. The harder the sell, the poorer the product.

Alas, my ignorance abounds; the more I've learned, the less I know that I know..........

Thou shalt seek and respect the opinions of operators, even unto the third helper, for theirs is a wisdom unknown to technicrats.

Wise men learn more from fools, than fools from wise men.

In my dotage I finally discovered that the secret to putting on pants both legs at a time is sitting down.
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Old 05-18-2011, 07:40 PM #6
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You reminded me of an episode two years ago after which I had feared for some time to work with butane.
Quote from another site -

Posted 02 February 2009 - 06:13 AM
Hey!
I made a lot of BHO runs but today was the last one.
Today I made it just to illustrate what I know that QuickAmber extraction is quite complete and the residue doesn’t cost a labour it requires to get.
I always redissolved my bho to filter it and it doesn’t matter if evap.bowl is stretched or not . This time because of small quantity I used inox evap.bowl instead of usual soup-plate and small extractor DIY1/2”.
The can wasn’t full and it took a short time. After butane was over and dripping stopped I’ve touched the bowl with gun nozzle for a last drop as I always did
…SPARK!
For my good luck it’s -19C outside and there was no fireball but until the spark was visible I’ve thought
“SHIT!..finally it happened! What for !? Was it really worthwhile?! What’s wrong? Metal! Shit!...”.
I’m not mystic at all but it was The SIGN.

And i said,
"no, no, no, no, i don't butane it no more,

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Old 05-18-2011, 08:43 PM #7
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^^^ Sounds like someone who shouldn't be using butane in the first place...

Great thread! I usually extract right by the front door, with it opened, and a large fan inside the house blowing outside. I also turn on the ceiling fans, just to make sure it doesn't have a chance to pool at all. I've done this literally hundreds of times safely, with no problems whatsoever. (Keep in mind, I'm a med patient in CO, not worried about someone walking up and seeing what I'm doing...)

In summer, it works even better to do it by the front door, as I turn on the swamp cooler, & it pressurizes the whole house. I close all the windows and doors except the one I'm extracting in front of, the pressure from the swamper pushes out everything QUICKLY (tested the air moving capabilities before I shot any tane with a burning joint, the smoke will give you a general idea of how fast the air is moving).

After I shoot the tane and 95% drips out (between 1-3.5 cans, depending on what size extractor I'm using), I take the tube and set it off in another pyrex dish, off to the side, so it can drip out whatevers left. I then take the dish with the butane, and place it into a waiting double boiler, still right by the front door, wide open. The butane is boiled off almost immediately at this point, during this whole time I'm extremely careful until the lions share of the butane is gone.

Once it's mostly gone, I'll leave it in the double boiler to purge, and leave the door open and fan on (or swamper on, depending on the season) for a while, just to make sure any residual is completely out of the house. No one smokes, walks or even farts while I'm shooting BHO, don't want any ignition sources, even the remotely possible ones like static. I don't close the door until 99% of the butane is gone, and only small bubbles of butane is all thats left.

This won't work for everyone, obviously, but it works well for me. Never liked extracting outside, always seems to be a bit of dirt or something that gets into the oil... YMMV.

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Old 05-18-2011, 09:05 PM #8
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Old 05-18-2011, 09:10 PM #9
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Old 05-18-2011, 09:10 PM #10
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