When BHO wax was first becoming popular, the extraction methods used were quite simple. Trim, stems, and left-over plant material that would otherwise go to waste would all be collected after harvesting. Because these parts of the plant still contain valuable cannabinoids and terpenes, wax can easily be extracted from it.
The extraction process would begin by grinding up the flower or excess trim. Then, this ground plant material would be stuffed into a tube. These tubes were and probably still are readily available at most headshops and grow supply stores, but initially PVC or metal pipes with sealed fittings at the end were used.
After stuffing all the plant material inside the tube, a can of butane would be pressed into one end of the tube so that liquid butane would âblastâ through the plant material. The butane solvent would extract all the active cannabinoids and terpenes in the raw plant material, carrying them along as it moved towards the other end of the tube. When the butane extract reached the other end, it was expelled usually into a glass container. From there the BHO wax would be left to sit while the butane evaporated.
The Professional Way of Extracting BHO Wax
Yes, BHO wax can be extracted using a makeshift tube stuffed full of stems and leaves, but for the highest quality extract possible, flower, or bud, should be used. In either case, butane hash oil extraction processes strip the resin glands from plant material. The plant material is discarded, and a highly concentrated and potent wax is purged of the butane solvent.
All of this sounds pretty straight forward and easy. A non-polar solvent is pushed through plant material. As the solvent moves through the plant material, it quickly dissolves the resin glands taking with it cannabinoids and terpenes and leaving chlorophyll and other undesirable plant matter behind. Then, the butane hash oil wax is collected in a container and left to sit until the solvent is purged. And in a perfect world where this is all done right, the end result is clean and potent wax.
The problem is, it isnât a perfect world and making high CBD BHO Wax the right way involves expensive equipment and expertise. We do not recommend attempting butane extraction at home by any means, it is extremely dangerous! This is something that should be left to the professionals.
Butane Extraction Methods
There are two methods used to perform butane extractions. Open extractions, or âopen blastingâ, and closed extractions, also known as âclosed loopâ.
Open Blasting
The original extraction method used for BHO wax is known as Open Blasting. In this method, a stainless steel or glass tube would be filled with plant material, and butane would be forced through the tube. This resulted in a thick yellow-orange, oil that exited the other end of the tube. The solvent would then be evaporated from the oil and once purged the oil would become usable wax.
Of course, this method brings with it a huge risk. With no safeguard to contain the solvent, there is plenty of opportunity for explosions and fires. Not only this, but it is also a very wasteful way to extract cannabinoids.
Closed Loop
A much safer and more efficient method of extracting cannabinoids is the Closed-Loop system. These hydrocarbon extraction systems contain the solvent throughout the entire process so there is less risk of a leak. The butane solvent is in a pressurized tank which is attached to the extraction tube containing the plant material. Both the solvent and plant material are kept within the extraction equipment, hence the term âclosed-loopâ.
Although this is still a much safer method of extraction, the equipment needs to be routinely checked and maintained by a professional. Of course, because of the high cost of the equipment, amateur extractors usually arenât the ones using it!