Green Mill Supercritical providing uniquely precise and automated CO2 supercritical fluid extraction SFE systems. Co2 extraction machine is cost-effective and delivers maximum control over pressure, temperature, and flow rate. Visit today High capacity and high quality CO2 CBD extraction machines power SC Botanicals new hemp processing facility. MedXtractor small-scale CO2 Extractors provide high-potency, high purity cannabis extracts. LEARN MORE TODAY by visiting medxtractor.com.
Produce Finished Oil in Record Time. For Real.
Here is some of what’s possible with this new technology:
Winterization without ethanol refines extract during the primary extraction while maintaining efficiency and fast speeds
Hundreds of thousands of dollars saved in startup costs over ethanol winterization
No loss of targeted compounds during winterization, saving potentially hundreds of thousands of dollars per year
An extraction lab free of expensive post-processing
A new category of high-grade extract untouched by contaminants of any kind and faithful to the originating plant
Increased profit margins on premium extract for a wider consumer base
Liberation from ethanol-based winterization
Maximum precision & control
Simple enough for almost any operator
If you are mechanically-curious, then you can quickly learn to produce consistent, high-quality extracts on any of our systems, for wholesale or end product development that will thrill customers while satisfying regulators.
Deep enough for master technicians
For extraction operators looking to develop methodologies only possible with a true instrumentation-grade extractor, we offer features like density feedback and control, triple inline fractionation, and software scripting and sequencing.
The Proof is in the data
Here’s data log proof of the level of control Green Mill systems provide during an extraction run, which translates into control for you over the product you manufacture:
These plot lines are taken directly from the data log file generated during an extraction using a default recipe.
Notice how system conditions quickly reach recipe settings and maintain stability for the duration of the extraction.
PRECISION & STABILITY
For Green Mill, precision and stability mean our CO₂ extraction systems sense the conditions they operate under and make second-by-second adjustments. Our engineers understand that when key conditions fluctuate, the operating business’ profit margins will be lower.
If your extraction machine doesn’t achieve stability when running a batch, then it is simply impossible to…
High Quality, High Capacity CBD Extraction Machinery
As seen in WSPA 7News’ video, “Inside Upstate CBD Oil Processing Facility ‘SC Botanicals,’” extraktLAB®’s Model 140 supercritical CO2 extractor is compact enough to fit in any size facility. Chris Cortina, SC Botanicals’ Director of Operations, outlines the supercritical CO2 extraction process before showing off their brand-new Model 140:
@ 1:37: “We use a process called, ‘supercritical CO2 extraction,’ that basically turns CO2 that you would get to carbonate beverages into a supercritical form. So, it acts as a gas and a liquid at the same time. And then, when you take your extract, it immediately evaporates so that there’s nothing left but the pure oil.”
@ 3:25 “This is a supercritical CO2 extractor. The way that it works: we load ground hemp into these columns here and the machine is pressurized. It takes supercritical CO2, which is carbon dioxide gas — the kind you’d see in beverage dispensers — and it turns it into a supercritical state, which is where it acts as a gas and liquid simultaneously. And that lets it act as a solvent for the CBD and pull it out.”
@ 3:52 “It only resides in this container and so when you extract the material the CO2 dissolves into the air. So the machine pressurizes these vessels and the oil flows through the machine and is captured in these collectors; these produce three different grades of oil. And so we collect them separately and they basically are homogenized for a final end product.”
High-Quality CBD Extraction Machinery
SC Botanicals is not the only hemp processor placing their bet on extraktLAB’s cutting-edge supercritical technology, which offers “some of the fastest processing on the market today,” according to GreenRushDaily.
The up-and-coming firm, Golden Developing Solutions, recently put out the very revealing press release, “Golden Developing Solutions Readies Launch of Supercritical CO2 CBD Extraction Facility in Colorado.” This article details the end of their due diligence phase prior to facility buildout:
“Management expects the facility to be fully operational by Summer 2019. Machinery orders will be finalized within the next 90 days. Following a detailed comparative examination of high-quality, high-capacity supercritical CO2 CBD extraction machinery manufacturers, the Company has narrowed its search down to Isolate Extraction Systems and ExtraktLAB” (Golden Developing Solutions 2019).
We’re honored to see our Model 140 supercritical CO2 extractor being so well-received! A throwback to our CEO Dr. Jon Thompson’s blog article, “How to Scale Up Your Extraction Business to Process One Ton Per Day,” outlines the Model 140’s high-performance numbers:
- 25 ft sq for extractor + 25 ft sq for chiller + 1 ft sq for the compressor = 51 ft sq.
- 63 amps for extractor + 15 amps (per extractor) for the chiller + 4 amps for the compressor.
- 17.6lbs/hr or 8 kg/hr.
- Trim at 20% delta 9 = 1,500-2,000 g/hr. Trim at 10% delta 9 = 800-900 g/hr.
- CO2 has no restrictions on amount as it poses no fire hazard. May need permit from city but this is (typically) a trivial process.
- Staff = three people per 8-hour shift. One person can run up tosix6 machines, need one person for pre-processing for six machines, and need one person for cleaning/maintenance.
Looking to scale your existing business into a one-ton-per-day hemp extraction facility? Read more about our facility design and layout services to learn how extraktLAB can help make it happen.
WSPA 7News. “Inside Upstate CBD Oil Processing Facility ‘SC Botanicals.’” YouTube: 07 December 2018. Website: https://www.youtube.com/watch?v=xGuauXXcMww
Frequently Asked Questions
Why should I choose extraktLAB equipment?
extraktLAB’s supercritical CO2 extractors are highly efficient and increase overall extraction yield. They are also capable of decreasing your yearly operating costs and leave scale up opportunities.
Does hemp biomass need to cure before extraction?
No, the material does not need to cure. Our methods complete the final drying step in a vacuum oven to bring the water content down from 10% to the 1% – 1.5% range for efficient CO2 extraction.
Can the drying process be accelerated using higher temps/lower humidity?
There are several drying methods used by growers to accelerate drying, but this is outside our scope of solutions. We recommend researching the agricultural methods to find what works best for you.
What are the typical conditions to dry hemp for extraction?
Harvest drying methods are outside the scope of our solutions; however, you want to dry the biomass to roughly 10% water content for quality storage to prevent mold or mildew.
When producing CBD from hemp, which part of the plant is typically used?
Typically flowers and leaves – no stems or stalks. Some producers will sort out the flowers and process them separately, but most processing includes the leaves and flowers.
Can ethanol become contaminated during ethanol extraction?
Yes, ethanol can become contaminated during ethanol extraction. It is important that you address the contamination with testing and reuse protocols. guidance for solvent reviews have been published by the FDA in 2010. Please refer to the many articles in this blog for more information on cross-contamination with extraction.
What is the electrical cost of ethanol extraction vs. CO2 extraction?
Processing a ton of hemp per day into extracts can be an energy-intensive process depending on how the hemp is extracted. The following table compares the energy expense for ethanol extraction versus the energy expense for CO2 extraction:
|Energy cost for Ethanol Extraction for 1 ton per day at 1 gallon ethanol per 1 lb of hemp|
|18711||litres to cool from 25 to -20|
|16840||litres to heat and evaporate after ethanol loss|
|454||kwhr to Cool from 25 to -20|
|481||kwhr to heat to boiling point|
|3105||kwhr to evaporate|
|4040||kwhr total @ 100% Efficiency|
|$ 0.09||per kwhr|
|$ 506.36||per day|
|Energy cost for CO2 Extraction at 1 ton per day including winterization|
|636||litres to cool from 25 to -20|
|636||litres to heat and evaporate after ethanol loss|
|15||kwhr to Cool from 25 to -20|
|18||kwhr to heat to boiling point|
|117||kwhr to evaporate|
|151||kwhr total @ 100% Efficiency|
|$ 0.09||per kwhr|
|$ 18.92||per day for winterization|
|43.20||Kwhr per day for CO2 extractors|
|$ 3.88||Per day for CO2 extractors|
Would you recommend ethanol extracted oils for Vape products?
Due to the risk of chemical contaminants that are found in 25 to 30% of ethanol extracted oils , we recommend that CO2 oils be used for Vapor Products.
Is it possible to make a solventless extract with CO2?
It is absolutely possible to make a solventless extract with CO2. Solventless extracts are typically made with subcritical CO2 extraction methods.
Does ethanol extraction have a greater throughput than CO2 extraction?
Hemp processing equipment can be scaled for 1 to 5 tons of extracted hemp per day. It’s generally not a fair comparison to compare the throughput on an instrument from two different companies. What is fair is to specify the throughput At the tonnage process per day and then look at the operating cost for that process. You can also look at the equipment and Facilities cost to accommodate that level of Production. after you have all of your costs accounted for including the hidden costs, then you can calculate the net present value for each investment.
What are the most common denaturants in ethanol?
Denatured ethanol is a mixture of denaturants and pure ethanol. Chemical companies add the denaturant to Pure ethanol so that they will not be consumed as a food.
Denatured recipes are published by the ttb that is administered by the National Bureau of Alcohol Tobacco and Firearms. There are many different recipes. one of the most common denaturants used in ethanol extraction is heptane. However there are other substances that may be used including acetone, isopropyl alcohol, methanol and other longer chain alcohols.
Is very limited data on the safety of heptane over the long term exposure. In fact the limit that the FDA has placed on the amount of heptane in a tincture for example was established in the 1990s on the basis of a single study published in 1981. That study the effect of heptane on Sprague dawley rats. That is why there are many disclaimers and the general guidance from the FDA is to limit the amount of solvent in any drug that is consumed.
Doesn’t ethanol extraction equipment remove all the ethanol from the biomass after extraction?
No. Approximately 5 to 10% of the ethanol is left in the biomass and is counted as a solvent loss. These solvent losses add up to operating costs. This is especially true if organic ethanol is used or food grade ethanol is utilized as the extraction solvent.
If you had an ethanol extraction facility, would you ever use CO2 just for stripping terpenes?
Ethanol extraction typically destroys the terpenes when the ethanol is removed from the extract or is distilled from the winterized oil. Many ethanol extractors are seeking a way to preserve the terpene profile of the plant in the output oil. To this end people have tried techniques such as Steam distillation, CO2 stripping, and vacuum distillation.
Certainly, CO2 can be used to strip terpenes from Hemp biomass Prior to ethanol extraction. However, vacuum distillation is by far the most gentle and effective way to harvest the terpene profile prior to ethanol extraction.
How do I model and compare the financial return of ethanol extraction vs CO2 extraction?
There are many inputs that need to be defined when creating a financial model comparing two different extraction methods. The first decision to be made is to decide what the financial metric will be used to make a decision on the superiority of one method over the other.
In this case, we recommend the use of the Net Present Value as the way to model the return of each extraction technique because it accounts for the cash flow associated with the operation. Many ethanol extraction companies try to make the argument that ethanol extraction is lower cost because the equipment cost is less. However, the equipment cost will have very little impact on the overall profitability of the operation at the same throughput.
The best way to compare the two techniques is to fix the throughput so that an apples-to-apples comparison can be made. Comparisons such are payback time and return on investment can mislead someone into making a bad investment decision.
So if we fix the throughput at one ton per day the cost of the hemp is equal between the techniques and operating cost variance is the only contributing factor.
Here are the twelve key questions that need to be defined in order to do a comparison:
- What is the direct labor to process?
- What is the energy to process?
- What are the solvent losses?
- What are the direct material startup costs including solvent startup costs?
- What are the cannabinoid recovery rates?
- How much solvent do I use, reuse, and when do I need to replace the solvent with fresh solvent? and at what interval?
- What is the insurance cost for each option?
- What is the cost of hazardous waste disposal?
- What is the cost of solvent removal?
- What is the cost of reuse of the solvent?
- What is the cost of HAP emissions?
- What is the depreciation for each option including building costs for H2 vs F2 occupancy?
Once these questions are answered you will be able to build a pro forma income statement.
- Standard labor
- Standard materials
You can then hold SG&A and R&D constant for both techniques and account for the difference in depreciation to get to a net margin number.
A cash flow statement can then be generated from net margin. One thing to note is that depreciation must be added back to net margin as it is a non-cash expense on the income statement.
Cash flows are then added up for 5 consecutive periods (years) including the initial outlay of cash for startup working capital. Those cash flows are then discounted at a discount rate (Weighted average cost of capital estimate at 13-17%).
If you do this analysis, you will find that CO2 extraction will absolutely crush ethanol extraction in terms of net present value.
Does it cost less to process hemp with Co2 compared with Ethanol?
In fact the operating cost for CO2 extraction is dramatically less than the operating costs associated with ethanol.
Extraction with Ethanol is a process that is typically run at low temperatures. First the ethanol is cooled to below -20oC before it is introduced to the hemp. Cooling the ethanol reduces the amount of extracted chlorophyll and waxes. If you account for the energy required to chill the ethanol down to those low temperatures and then also evaporate after use, the energy bill for extracting ethanol is approximately 3-6x the cost of extracting with CO2. However, the energy cost is really not the key driver in the overall operating costs.
Ethanol extraction requires a significant amount of ethanol to be used per pound of hemp. In fact, about 1 to 1.5 gallons of ethanol must be used per pound of dry hemp in order to extract. Hemp is a very absorbent biomass material and the ethanol must fully saturate the hemp plant before any extraction can take place. For this reason a large volume of ethanol is needed to extract cbd from hemp.
The key cost driver or ethanol extraction is recovery of that solvent from the biomass. Even though many ethanol extraction equipment companies provide centrifuges and or presses to eliminate the amount of ethanol left over in the biomass, The best equipment will provide only a 90 to 95% recovery of the ethanol. This 5 to 10% loss in ethanol is a huge cost driver for extracting ethanol.
For example, suppose you wanted to process 1000 lb of hemp. You would need 1000 gallons of ethanol to start out at a cost of $16-33 per gallon for food grade ethanol for a total cost of $16,000 to $33,000. If you recovered 90% of the ethanol the ethanol loss would be $1,600 – $3,300 per 1000 lbs. Furthermore if you process 1000 pounds per day, this would be your daily loss.
In contrast, you will lose the equivalent of about $70 per day for CO2 extractions for the exact same process.
Besides energy and solvent usage, there are many other hidden costs related to extraction with ethanol including solvent reuse costs, insurance cost, increased facilities cost, and testing costs.
Is CO2 cheaper than ethanol?
A pound of food grade ethanol when purchased in bulk is $4.71/lb at current price.
A pound of food grade CO2 when purchased in bulk is about $0.04/lb at current price.
What’s the purity of the CO2 used in CO2 extraction?
There are many grades of CO2 including industrial and food grade and medical grade. We typically use food grade but medical grade is also highly desirable. the specifications for each of these grades are published by the Compressed Gas Association or by your gas supplier.
Hi Jim, First Run Complete. Thanks for your Help. The quality of the CO2 oil far exceeded my expectations. Brad, Ontario.
Hi Jim, things are great! The machine is performing great and we would be glad to recommend your machine. Florida is cultivating and we may be getting contracts to process for farmers. Your machine started it all. Tina, FL
I purchased the 16oz. Disruptor a few weeks ago. From the first phone inquiry to present I have been treated with a degree of respect and professionalism that is hard to find these days. The International purchase was made as easy as possible, unit arriving complete and in good condition. The operators manual is thorough. System design and quality are best. I work in a field dealing with process control and the standard to which I compare is industrial/medical etc. After you have done a few processes you will really appreciate the ease and simplicity of the Medextractor system. Al Block is a wealth of information (have pen and pad ready) and seems to be always available for questions. With his tips and reminders I was off to a running start. Congratulations to Medextractor for developing this amazing product for a reasonable cost. I have found it to meet all the quality and production claims and have received five star customer service.” D.C. San Diego
“Hi Jim, just wanted to let you know the MedXtractor D-16 is doing beautifully! We’re so pleased! Hope to do business together again soon!”
Tina and Daniel, Florida
“A few months ago I purchased the MedXtractor Disruptor 16 and I wanted to let you know that I am very happy with my purchase, it was an excellent investment.
The Disruptor 16 works great, silent, and produces an excellent extract. The shipment arrived after a few days of purchase, and everything was in the box as described. Best of all, the customer support is quick and reliable, the information provided was accurate and helpful, all my questions were answered in a timely manner.
Thank you Jim, I am looking forward to a long term business relationship with you and MedXtractor. “AA
“Good afternoon Jim. Let me tell ya you have two very excited guys up here. Last nights run went off without a hitch. Things are coming together nicely.” GH
“Hello Jim! Just a quick note to let you know how we are doing. We are achieving as high as 16 gms. Needless to say I am quite happy with that!
– Robert M (2oz extractor)”
“The dabs were fantastic, the flavor was very prominent, the effects were fantastic and came up slowly and faded slowly as well. I’m quite impressed with it! Thanks. Mona”
“It should not be understated!…this extractor WILL make a silk purse from a sow’s ear, remember this today at the show. Feel free to give my # if you have a serious customer that wants some testimony! Get pumped Jim…you have a great system!”
”Wow Jim. I’m so very happy. Finished the extraction late last night and I’m just trying it now. Very nice. I also did another extraction today. I wanted to see how much less of a yield I’d get if I didn’t decarboxylate the material first… definitely enjoy the terpene tastes I got from the second extraction more, but the decarboxylated version is pretty good as well.”
“There was a comment made in a review about “Making a silk purse from a sow’s ear”. Totally accurate assessment! First and foremost, you need to understand Co2 extraction. This is not Butane or other methods. This is a high pressure Co2 extract system. Truly as good as it gets. No Hydrocarbons etc. You will be producing the same product as the $100,000 plus co2 machines. Medical grade extract is produced. The Medxtractor method is incredibly economical when compared to other personal extract systems. The 2oz size is perfect for one or two people. When using this system the waste is minimal in all aspects. This goes for the raw material as well as the Co2. If you are familiar with extraction, you rarely get 60% of the essential oils out. While true this must be factored with; you use nearly 100% of your raw material. This changes the yield significantly. It also decreases handling during raw material picking and curing. The end product is always the same, just pure 100% extract. Instead of “garbage in garbage out” you will have varying amounts of extract based on the quality of the raw and your personal process capability. Depending on how good you get at it, more is always going to be there. This is with 2oz of pretty “sows ear” raw. This is not an “anybody can do it” “Turnkey” operation without forethought. I recommend watching all the videos. You will need to be comfortable with your expectations, theory of Co2 extraction, equipment and process. Our first try was spent tweaking the equipment, learning the process and testing. A few calls to Medxtractor and reading. We tightened any leaking fittings learned how to use timers, received a crash course in thermal dynamics etc. Even with that, on the first try the extractor produced 3ml of thinned extract that function perfectly. It indeed met ALL expectations. This will be much better than what you may have purchased that has been mass produced. Think of it as a “Craft” as opposed to “National Brewery”. Used with a neutral terpene thinner, it is nearly tasteless, odorless and 100% chemical free. On a final note, after my long career of customer service, I can say this company stands firmly behind their product. The most important part of this endeavor for me was the involvement of the company. A phone call away (at sometimes bizarre hours) if I didn’t receive an immediate answer, I received a rapid call back or email. Medxtractor displayed a willingness to walk you through it. Parts replacement and, general help were always right there. While learning how to do this I never felt I picked the wrong company. Super Job! Great price for what you can do.”