Butane Honey Oil Extraction Guide
Here is a basic Butane Honey Oil Extraction Guide. ALL of the information obtained and shared in this post is strictly for the process of making BHO in states where it is LEGAL to do so. This Butane Honey Oil Extraction Guide is NOT to be used by first time extractors! If you are extracting BHO for the first time, PLEASE DO IT OUTSIDE & have someone with experience work with you. House of Dabs is NOT responsible for ANY misuse of this information.
First off, you need a tube. There are about 4 regularily used versions: Stainless turkey baster, glass tube made by glass blowers, the OKief stainless tube you can buy online, and the last category is any homemade tube you may devise. Smaller diameter is better, so a tube with a ½ inch diameter is more efficient than a tube with an inch diameter. I use glass tubes that have a small lip on the exit end to allow you to make a good seal easily. Smaller than 3/4 inch is hard to empty afterwords.A smaller tube diameter allows more complete saturation of the medium, as well as greater flow rate of butane through the medium which seems beneficial for effective extracting.
The tricky part of getting a good tube is having a good entrance hole for the butane nozzle. Butane gas always comes in a can with a tip that is a certain size(for lighters), so making an end cap that a butane can be inserted into and depressed is the key. Several solutions have been used, ranging from copper tubes with an end cap attached that you can drill a proper size hole into, to glass turkey basters that have a nice size end naturally, to stainless turkey basters now, which are quite easy to rig up, I hear. Even stainless mountain bike parts have been used very effectively.. here is a glass tube like i used these days…
PVC tubing has been said to be bad, and I would shy away from it, but I have seen evidence from someone that rigid PVC is perfectly acceptable. Do your own research if you don’t use glass or steel, is my advice.
Ok lets suppose you have a tube that you can insert a butane nozzle in to one end of… you want it to be leak proof around the edge of your tube at the top if it has an end cap… Don’t use tape to seal leaks, you may leach tape glue into your oil.
So you have a tube, fill it with your extractables. I have a tube which holds about 8 – 16 grams, and another that holds about 25-40 grams. You don’t need to fill the tube completely, but it seems best for efficient extractions to put the product in there a bit snugly. I don’t recommend grinding up your extracting medium too fine, as you will get a greener less tasty oil almost for sure. Sometimes I use whole buds, then I re-extract from them, after crushing them up in order to get all the goodness (especially if it cost me money). Other times I cut them up coarsely, or just break them up by hand into little pea sized chunks. Some bud is so dense it seems maybe breaking it into chunks may increase yield slightly. Leaf is like whatever.. just cram it in.
So now you have a tube with weed product in it, you will want to cap the exit end. At the exit end of your tube you want to attach a minimum of one coffee filter circle. I cut them from white coffee filter papers, (brown would be better probly, no dioxins…). I make it about an inch in diameter larger than the tube. I use two actually, and there are occasions where the filter papers can rip. Uneven packing is the main culprit; don’t pack tightly at the entrance end, then loosely down the tube, the extracting medium can shift suddenly and blow out. If one is worried about this, use a steel mesh safety screen, such as tea strainer material. I have had blowouts more times than I can remember, and one time I got two eyefuls of oil laden butane…. Not pleasant I must say. Also, inspect a filter after attatching to see it has good integrity, no rips or tear marks forming.
Next, either get a steel hose clamp, for many tube types, and fold the filters over the exit end and use the hose clamp to hold them on, or a zip tie works well too, especially on glass tubes to prevent overtightening and breakage concerns. . I am not sure all the methods use to hold the filter on for different tube types, just remember you don’t want to extract any glues from tape etc….
I use one can of colibri (300 ml) butane for about 20 grams of bud. After doing tests it has been shown that about 95% of the oil from 20 grams will be extracted with a can. A second can will produce maybe 5% more oil, for a whole can of butane used. On a smaller amount such as 10 grams if one uses about half a can its fairly thorough There is a list at keen marketing…http://www.keen-newport.com/ourBenchmark.htm which lists types manufactured to a certain purity standard; most butane oil makers recommend using only quality butane, as additives and impurities in low quality butane may be inhaled…. A few others recommmended are vector, lucienne and king(heard one bad report on king).
Now is the dangerous part of extracting, first running the butane through the marijuana, and then second evaporating it off. Its easy to put the butane through. Just hold the tube vertical with one hand, with a protective mitt usually (tube freezes), and insert the butane tip and depress, letting the whole can go through without stopping. Hopefully you have no leakage from the top, or weird sprays from bad sealing at the bottom. you may lose a small amouint of oil if so. You can go slower, and stop and start, to try and slow down the butane’s progress through the weed, but it makes little difference. Put a glass dish under to catch it. Then you can also have a second dish(fry pan i use) underneath that at this point as well, filled with tap hot water to make a bath underneath.. I use a pyrex pie plate.and a frying pan for the hot water bath.
Now you have a dish of liquid butane, and this is the most dangerous moment… for if this were to ignite, the fast and furious fireball would probably burn off all your exposed body hair… etc..etc…. lets just not go there….! You need to evaporate off the liquid butane, and easiest is to get a frying pan or what fits well to go under your dish of butane, in order to double boiler style remove the butane. I use hot water from the tap as I think boiling water is detrimental somehow to the easy removal of all the butane, but its open for debate. It seems hot water is better than boiling.. do your own tests if you want.
Keep this dish outside, and evaporate it off( this means leaving it outside on the hot water bath for a short period of time) with NO OPEN FLAME ETC! nearby. – a barbecue would be bad too I bet… It only take a minute to evaporate a can, then its safe to take the dishes inside, only when there is no liquid butane left in the dish!
Well as mentioned, I do a hot water bath(tap hot) to get rid of the liquid butane, then I take it inside and put it on the stove to keep it hot for about a half hour or a bit more. Turn the element on a couple times, just to maintain the heat of the hot water bath to be very hot( not too close to boiling but fairly hot). also I have found very helpful for effective purging is to cover the pyrex pie plate with a lid. i have a glass dish which fits well, and then the oil gets and remains much hotter on its surface, as well as underneath. seems much more effective with a lid. then i open the lid a few times(every 5-10 minutes), and heat treat from above with a butane torch to pop any butane bubbles… and generally just overall lightly warm the whole surface too. Depending on amount it may take just one time with the torch, or possibly a few times may be needed wih a thicker mass of oil. More oil has more flaming bubbles. 10 minutes a gram of extract produced seems adequate, for a few grams. If you do lots of oil I would recommend only about 7 grams maximum per plate for full purges achieved with this method.
You can cook bubbles off the top and out of the butane for hours, but you dont have to, and actually those bubbles aren’t butane when removed at this stage, but actually thc volatiles gassing out of the hot oil mix. It is necessary to heat it to a certain degree to remove the last trapped butane but careful heating is the key to achieving rock hard oil and sacrificing the least amount of good thc volatiles. if bubbles don’t flame, they aren’t butane. you know you are done purging if you try to light small bubbles and they wont flame..its do-able( a whole extraction) in less than an hour.
then i scrape it up and its good to vape!
SOURCE: Colorado X Cup