I recall being told by a chemist that molecules in solution are not rigid in form and can essentially be squeezed through various sizes to a certain degree. He told me these filters are not as simple as they are being marketed as. Can any chemists in here confirm this?
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Can you provide a link? Cant find it on their website.
Seems like duramem is about perfect… 
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Tread I started a while back with plenty of info happy reading
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I’m getting my hands on a small Sterlitech / Evonik unit just to show proof of concept.
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Let me know what you find! Seems a great way to save tons of time!
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When I say small, I mean mL’s per hour
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Has anyone tried the Evonik filters? I saw them at Concentration Expo and it sounded great but they didn’t have any industrial systems operational.
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Sterlitech claimed the largest Evonik membrane they know of being used on cannabis actively does 25 L/hr of ethanol removal from crude.
I’ve also physically seen one in a cannabis facility that I’m pretty damn sure can do more than that. But I never got to see it run.
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I’ve used them at bench-scale, as well as a few others. Your typical RO membrane will have compounds that are not compatible with ethanol. You need to find an organic solvent compatible RO (or a tight NF) for a desolvation application. Most of the patents I’ve seen so far probably won’t be defensible. There is prior art out there from other industries that makes the application “obvious” to an individual “learned in the art”. Membrane separations at the molecular scale can be tricky. Salt removal from water uses mostly charge repulsion of the anion to reject salt, with the cation “pairing” to maintain neutral charge. Very small neutral molecules are poorly rejected. To complicate this, the surface charge and steric hindrances change with pH. For organic solvents with a neutral molecule, size exclusion matters more. The complicated shape of the molecule, temperature, pressure and concentration differential all matter.
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That’s the largest one that Sterlitech sells. Evonik makes one module (8040 series) that should do 100 L/hr per unit. You can also put them in series to get the result your’re looking for. Not cheap, but still looking pretty promising.
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Hello,
Heyes Filters Inc. has been selling filtration products into the F&B and Biotech/ Pharma industry for 33 years here in Los Angeles. We have filtration solutions for the small and larger Canabis producers for both Calrification (Gross solids removal) and Carbon treatment for Color and Odor removal. We do work with Koch Membranes in the wine business but I believe that the MF spectrum they provide is oversized currently for most Cannabis operations. We have a variety of separation methods that we are currently selling into this industry with great success.
Let me know if we can be of service.
Cheers
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Link ?
How would you filter out 1 kg of fats and waxes
How would you filter out 10 kg of fats and waxes
Both at temperatures below 40F /40C
?
What type of filtration to take out 1 kg of powders. ( bentonite) how 10 kg
Teach us the fastest route at afordible pricing we are all ears !!
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Interested for sure. Will you send me some samples to test for us?!
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Material type that filter is made of?
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We have sanitary bag filter housings/ media to filter gross solids then we offer lenticular housings/ filter media to manage particulate removal and then color/ aroma through Carbon lenticular filtration. All done at temperatures of -40C and lower.
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What the pro way for bag filters when a bentonite sluge is pushed treu
Pressure by means of gas (air)
Or pressure by means of liquid (sludge )
Pump ?
If a liquid pump is recommended wich brand and type of pump would that be ?
Wich brands have solvent proof pumps that can Handel sludges at 60 psi ?
Thx
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you guys (heyes) have a cartridge filter that goes down to 0.2um? currently have a SS 33" sock filter with every micron 200/100/75/50/25/15/10/5/3/1/0.5 bags but would like sterile/biological down to 0.2um.
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