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Old 05-07-2017, 12:07 PM #1
ButterCup
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Rotovap vs SprayVap

I need to evaporate large quantities of ethanol whilst under vacuum and keeping the sample temp to around 40c max.

So I was looking around and found SprayVap made by CES

The sprayvap does 24 liters of EtOH per hour compared to a 20 liter rotovap at 6-8 liters per hour. And AI rotovaps have worked fine for me and they are 20k for the kit.

I am leaning towards the 3-4 Rotovaps because if I goes down you are still running. But going with the sprayvap, if it goes down then your whole op is down.
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Old 05-07-2017, 07:34 PM #2
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Excuse me, you didn't mention jacketed reactors, why are they offered to the community if not for pulling off solvent?

https://www.bestvaluevacs.com/5l-jacketed-reactor.html
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https://www.icmag.com/ic/showpost.ph...&postcount=162

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Old 05-07-2017, 10:43 PM #3
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I was also looking into these guys as an option for alcohol extract. Anyone actually using the CES system ?
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Old 05-08-2017, 12:27 AM #4
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Quote:
Originally Posted by SkyHighLer View Post
Excuse me, you didn't mention jacketed reactors, why are they offered to the community if not for pulling off solvent?

https://www.bestvaluevacs.com/5l-jacketed-reactor.html
I always figured those were used for crystallization.
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Old 05-08-2017, 06:51 PM #5
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Quote:
Originally Posted by Breakover View Post
I always figured those were used for crystallization.
Jacketed reactors are used when you need vigorous stirring, temperature control, in process reagent addition, and continuous operation.

The attached DMT and DET procedures beg a jacketed reactor. From "The Psychedelic Guide to the Preparation of the Eucharist in a few of it's many guises" as edited by Robert E. Brown & Associates of the Neo American Church League for Spiritual Development & The Ultimate Authority of the Clear Light

https://www.icmag.com/ic/showthread....tion+eucharist
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Hash oil techniques and solvents for non BHO hash oil?
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Solvents listed as to polarity
https://www.icmag.com/ic/showpost.ph...&postcount=162

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Last edited by SkyHighLer; 05-08-2017 at 07:01 PM..
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Old 05-11-2017, 02:33 PM #6
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Off topic, the question concerned low temp vacuum distillation, but....

https://solvent-recycler.com

https://www.beccainc.com/solvent-dis...ing-equipment/
https://ecopureenvironmental.com/index.html

There are many other first world based companies manufacturing these solvent recovery devices, and then there's China and India.

The collection bags are usually nylon, sometimes PTFE.

https://www.beccainc.com/products/pa...lation-liners/

https://www.youtube.com/watch?v=m8jgVCHO-Gw

Oral/topical meds, feed for fractional distillation, etc.


"Solvents

The Sidewinder Model M-2 has been tested and certified by Underwriters Laboratories, Inc for use in a normal, non-hazardous location. Here are some of the solvents for recycling but you may know them under a different name. Please call us and we can help you determine if the Sidewinder is the right distiller reclaimer for your solvents. Be prepared to email us your MSD sheet.

acetone
butanol
diacetone alcohol
diethyl ketone
ethanol
ethyl acetate
isoamyl alcohol
isobutyl acetate
isopropyl acetate
isopropyl alcohol
lacquer thinner
methanol
methyl cellosolve
methyl ethyl ketone
methyl isobutyl ketone
methyl n-amyl ketone
2-methyl-2-propanol
n-butyl acetate
n-propyl acetate
naphtha (light aliphatic)
naphtha (petroleum spirits)
paint thinner
propanol
stoddard"


I'm currently investigating the best of those, and several more here,

(I listed them as to relative polarity, and included boiling points for comparison)

https://www.icmag.com/ic/showpost.ph...&postcount=162

If you read through the entire thread, the details of how anyone can acquire the listed solvents is described in detail.



Most of these solvent recyclers have a vacuum distillation option available so they can be run at reduced pressure to lower the boil off temperature. To protect from corrosion damage due to processing solvents contaminated with acids, etc. they often offer a stainless steel option in lieu of copper coils. The larger units have a 'scrapper' (stirring paddle,) and are set up for continuous processing. The manufacturers selling these units should also be able to assist in setting up an approvable facility.


I found a comparison to wiped film,

"How do your units compare to a wiped film (thin film) evaporator?

Wiped film (thin film for WFE) evaporators are designed to run in an application where there is continuous imput from a manufacturing process and the composition of the input does not change significantly. PRI’s units are designed to handle variable waste streams with little or no input from the operator. Because PRI’s systems do not use high speed rotating parts and do not require tight tolerances , little maintenance is required compared to a wiped form unit."

https://www.progressive-recovery.com/service/faqs/

Much safer, easier to operate, unattended 24 hour a day operation, less expensive both initially and in the long run, high volume units available, nearly the same speed as rotovaps and wiped film.

I've never seen these devices mentioned previously, I pm'd Gray Wolf for feedback, what's up???
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Best to Worst Canned Butane List
https://www.icmag.com/ic/showpost.ph...6&postcount=28

Cannabis Alchemy by D. Gold
https://calgarycmmc.com/E-books/E%20B...0D.%20Gold.pdf

Hash oil techniques and solvents for non BHO hash oil?
https://www.icmag.com/ic/showthread.php?t=338633

Solvents listed as to polarity
https://www.icmag.com/ic/showpost.ph...&postcount=162

The Truth Machine by James L. Halperin (free read provided by the author)
https://coins.ha.com/information/ttm.s

Last edited by SkyHighLer; 06-20-2017 at 05:39 PM..
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Old 07-05-2017, 11:57 PM #7
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SprayVap Vs. RotoVap

Quote:
Originally Posted by ButterCup View Post
I need to evaporate large quantities of ethanol whilst under vacuum and keeping the sample temp to around 40c max.

So I was looking around and found SprayVap made by CES

The sprayvap does 24 liters of EtOH per hour compared to a 20 liter rotovap at 6-8 liters per hour. And AI rotovaps have worked fine for me and they are 20k for the kit.

I am leaning towards the 3-4 Rotovaps because if I goes down you are still running. But going with the sprayvap, if it goes down then your whole op is down.
Every system has its pros and cons. The RotoVap is a batch process that has been around for over 50 years and does small batch (no production) processing quite well.

The SprayVap is a continuous, closed loop system that is easy to use, provides high throughput, and consistency in the quality of the oil. These means that the SprayVap can evaporate alcohol out of the tincture fast and efficiently (SV20 upto 24 LPH) while protecting and preserving the essentials, including terpenes. The SprayVap is designed to operate in an environment were production of consistent, high quality oil is key.

Additionally, the alcohol is re-purified every time (never have to throw away alcohol), little to no maintenance, no bumping, and runs by the push of a button.

Demonstrations every Tuesday and Thursday, on-site, at Colorado Extraction Systems in Wheat Ridge, CO

Book online at www.coloradoextractionsystems.com
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Old 07-06-2017, 04:45 AM #8
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Here's a demo of the full system.


https://youtu.be/4ZVYUeBOmtM
https://youtu.be/jPdi_fYEJIs
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Old 07-06-2017, 05:00 AM #9
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A 50L rotovap will do 20 liters per hour. Two of those is still less than the sprayvap.

The sprayvap seems to have the potential to contaminate the distilled output as well. Atomized input could get mixed with the output too easily.

RB
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Old 07-06-2017, 06:33 AM #10
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Quote:
Originally Posted by Rickys bong View Post
A 50L rotovap will do 20 liters per hour. Two of those is still less than the sprayvap.

The sprayvap seems to have the potential to contaminate the distilled output as well. Atomized input could get mixed with the output too easily.

RB
While it may be possible for 2 50L rotovaps (typically max etoh evap rate of 15 LPH) to keep up with the evaporation rate of a small sprayvap, running a rotovap is a pain in the butt (beginning to end, including clean up). The SprayVap eliminates those issues and allows you to continually run. In fact, SprayVaps have evaporation rates as high as 68 LPH for production models and higher for custom. Also, i think two rotos are more than the cost of a sprayvap, even alibaba rotos.

One thing i have noticed is that rotovaps tend to load up the alcohol distillate with water and terpenes, which reduces its effectiveness and contaminates the alcohol, requiring you to dispose of it after 3 or 4 runs. The SprayVap can take that waste product and re-purify it by separating the water and terpenes from the alcohol, thus returning its effectiveness (i.e. proof).
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