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Old 06-18-2013, 03:40 PM   #11
FarmerTed
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You'll definitely have to steam distill the hops to get the oils out. I'm not sure if I've ever done a steam distillation myself (done the regular kind millions of times), but I think your yields will suck. A vacuum distillation or vac transfer would be the way to go, but I doubt you have a food-grade schlenck line to work with (who does?).

 
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Old 06-18-2013, 05:06 PM   #12
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Yes, you can extract the essential oils from hops by steam distillation just as you can from any other plant material. The apparatus is as pictured here:
http://www.pbase.com/agamid/image/132252629

The yields are small (because hops don't contain much oil). http://www.pbase.com/agamid/image/132252630 shows what I got out of a pound of Saaz Leaf and http://www.pbase.com/agamid/image/132389261 the yield from 4 Oz Sterling pellets. Both smelled really, really good.

As the steam distillation is laborious, requires a fair amount of equipment (including the special receiver) and is time consuming it is doubtless much more practical to by industrially extracted oil.

As far as TTB is concerned it is quite legal to do all this but if your distillation flask is bigger than 4L it must be registered with them.

 
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Old 06-18-2013, 05:14 PM   #13
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If you get 16 ml from a pound of Saaz, how much of that oil did you put into a brew? and how did the flavor come out as compared to standard hopping?

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Old 06-18-2013, 08:12 PM   #14
ajdelange
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That's 0.16 mL - not 16 mL. I didn't put it into a beer but rather, as I recall, took it to my next club meeting and offered it to the ladies who used it as perfume.

 
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Old 06-18-2013, 09:00 PM   #15
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Damn the non refreshing I just posted exactly what is above.
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Old 06-18-2013, 09:29 PM   #16
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Yes you can do it, but as others said the yields will be small. If you are doing it for aroma only, then knock yourself out.
If you are trying to use CO2 extract for bittering, then that is a different story. Get a hopshot or cans of CO2 hop oil and use as needed.

 
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Old 06-18-2013, 11:25 PM   #17
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Keep in mind that this is hop oil. It is not bitter. The CO2 extracts include the bittering principle.

 
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Old 06-19-2013, 07:08 AM   #18
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if you are going for a similar extraction to what you would get from a dry hop shouldn't you be able to steep hops in room temp 5% ethanol solution for a few days, mimicking an actual dry hop, and then do a freeze-gelatin clarification, or something similar, as is used for super clear consomme? i just started playing with freeze-agar clarifying, but i must admit my first hop experiment (cascade, and waaay too much of it) was not a huge success.

 
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Old 06-19-2013, 11:14 AM   #19
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Quote:
Originally Posted by ajdelange View Post
That's 0.16 mL - not 16 mL. I didn't put it into a beer but rather, as I recall, took it to my next club meeting and offered it to the ladies who used it as perfume.
Did they smell like BO after 20 min? In my experience hop oils/resins after 15-20 min exposure to oxygen smell like old t-shirts that bubba wore for 5 days mowing grass during July in Atlanta. At my least shirt does when helping weigh out of 100kg bails, and its not from sweating in the 0C cooler.
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Old 03-18-2016, 01:14 AM   #20
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Quote:
Originally Posted by smokinghole View Post
Did they smell like BO after 20 min? In my experience hop oils/resins after 15-20 min exposure to oxygen smell like old t-shirts that bubba wore for 5 days mowing grass during July in Atlanta. At my least shirt does when helping weigh out of 100kg bails, and its not from sweating in the 0C cooler.
Thread revival! I'm finishing a 30 single-hop brews in as many days and despite being pooped from the process I'm already working on the next project to occupy myself with. I work for a hops distributor in Yakima so availability is not an issue.

I've been doing some research into this process and figured I'd share what I've gathered from some industry people doing exactly this.

Some hops are more generous than others regarding essential oils. Cascade yields between 0.5 and 2 mL per 100g of flower through water distillation. Some experimental varieties are producing upwards to 6 mL per 100g though so there is potential for some decent returns on your efforts.

What a chemist for an R&D wing of a major hop breeder said about odors from the hops, that these will dissipate with time. White flecks that form are myrcene, and you can store your oils with a little blend of vitamin E and try to fill your container's head space with CO2. O2 is great for breathing but not for hop anything.

Has anyone learned anything new in the last few year? I will be attempting a run with water below a false bottom filled with hops. I'm curious to try several methods, including water/ethanol blends, and soaking hops or putting in dry over a bath.

 
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