Hemp Extraction Solvents 101

Why Care about Extraction Solvents?

We don’t like to be dramatic, but when it comes to solvents, what you don’t know can literally kill you.

Here’s just one example:
The vacuum (air pressure) in your system dramatically alters the boiling point of certain solvents, and small changes or inconsistencies can make differences that almost seem to defy common sense. Did you know there are solvents that, under certain conditions, can boil at a mere 15 degrees F, or well below the freezing point of water? It’s true, look up the boiling point of ethanol under vacuum.

We’re hearing about a disturbing trend in the industry where processors are altering solvents and mixtures to address concerns such as taxes, extraction process efficiency, and solvent recovery. As the industry grows, the internet becomes rife with inexpert advice and supposition.

Consequences of the Wrong Hemp Extraction Solvents

Experimenting on your own can have real consequences including fire code violations, personal injury, and property damage. Any time the solvent mixture is changed, the system requires a complete re-permitting effort (see 2018 International Fire Code Ch 38).

Fortunately, these pitfalls are easily avoided when you hire a professional engineering firm to design a safe, efficient, and cost-effective set up. You’ll save money in the long run by making the right choice the first time. As we like to say, “Good Design Saves Time.”

Common Hemp Extraction Solvents

Here’s a summary of common solvents and some considerations with each.

	Ethanol	Butane	CO2
Risk	Flammable	Explosive	Displaces oxygen
Pressure	Atmospheric	Medium	Very high
Toxicity	Food grade	Toxic	Inert gas (non-reactive)
Equipment cost	Low to moderate	Moderate	High
Classification	C1D2	C1D1	Unclassified
Ease of permitting	Bad	Bad	Not quite as bad
Construction cost	$$$	$$$	$$

Don’t know where to begin? It’s easy. With over 75 completed extraction facilities designed, permitted, and in operation, we have the experience to help you make the right decisions. Learn what services we provide.