new winterizing tool

http://www.capitolscientific.com/Corning-431153-Sterile-150mL-Vacuum-Filter-Unit-with-0-22m-Polyethersulfone-Membrane-Case-of-12

i dont know how big that filter is, can some one step in and let me know how that compares to a coffee filter. could i use the 0.22µm Polyethersulfone Membrane for winterizing

yes.....i need a vacuum assisted filter unit, also a cold trap.

I wouldn't try to reuse the membrane. I've tried to use a 25micron bubble bag screen for a long time and eventually the screen became very clogged up even with washing/soaking the screen after every use. Now i'm just using coffee filers and eventually i'll do a run with all the filters i've collected like i've seen done before.
If you didn't plan on reusing but rather replacing the membrane after each use then it might work fine i just don't know much about Polyethersulfone compatibility with ethanol.

Some of my coffee filters have sooo much oil on them it seems......

You don't need a 0.2 micron filter for winterizing. A Whatman #1 lab filter will suffice using a vacuum, which is only about 17 microns.

A polysulfone membrane should be OK in ethanol, per attached link. We use plain ole cellulose nitrate 0.2 micron syringe filters for fine work and #1 lab filters for winterizing with a vacuum.

http://media.sterlitech.com/pdfs/Chemical_Compatibility.pdf

so the vacuum pulls thru the filter into the everclear bottle as it winterizes. what are those other 2 bottles for? catching alcohol too? looks like your winterizing and boiling at the same time, if not sounds like the next step lol

thats what i am trying to figure if the ethanol will fuck it up the filter

You can find a cheaper one that is more effective, comes with a Boucher(sp?) Funnel, reusable lab filters (I believe)

Google

Vacuum filtration..should be the first link.

I think it more serve a better purpose for those Iso-pros, rather than winterization.

greenghost420 said:

so the vacuum pulls thru the filter into the everclear bottle as it winterizes. what are those other 2 bottles for? catching alcohol too? looks like your winterizing and boiling at the same time, if not sounds like the next step lol

Click to expand...

The vacuum pump shown, is a military surplus MASH pump, and the bottles are to catch bodily fluids. The fixed rotary vane pump will also tolerate fluids, but is limited in how far down it will pull.

We use a cold trap in front of our sliding rotary vane AC vacuum pumps, to reduce crankcase oil contamination when cold boiling, but usually not just for filtration.

i figured there must be a cold trap in there...

We actually don't have to use a cold trap with the MASH pump when vacuum filtering, as its bearings are sealed from the stream.

Where we do use one, is for cold boiling solvent.

Those filters are more suited to filtering oils as a carrier for certain chemicals. As far as winterizing with it I have no idea.

For winterizing I prefer a water aspirator as I didn't have a cold trap, and it was way better than hand pumping. It's probably 20 bux for one in the states, I only have to use the jet pump because we have crap water pressure, in a normal home that white bit that's the nalgene aspirator would be attached to the faucet. It save's allot of headache when it comes to your solvent beginning to cold boil under vac while your in the middle of filtration. The glass filter is permanent and I try not to get crap in it, the microfiber filter's that I use are one of the types you can choose from. If they had any other filter i probably wouldn't have gone with microfiber now I just get them because It's all I've ever known.

How hot are we talking at full vac and 60 seconds of run time?

Never could find a table covering vac pressure to temperature.

you can't find a table because you have to add what your evaporating and at what rate. Which of course is constantly changing as the amount of what your evaporating leaves the chamber. Do you mean how hot is my solvent that it's boiling under vac? It's more like the contrast of going into the vessel after filtration that's boiling the alcohol. Its more likely cold boiling because of my work environment, it stops usually by 60 seconds, I think it's my methanol which is boiling out of my ethanol that makes it seems so violent.

If i wanted to be a freak you can stop it from boiling by insultating the receiving vessel but it's not worth it as I like loosing methanol from my ethanol before I recover it etha from the vac.
I've never actually asked but after winterizing are you guys purging off your ethanol before vac? I go straight into the vac and play the throttle game so I don't get bumping and have an oil explosion. I kinda wondered why nobody else talks about it, but i guess it's cuzz they never do because of the vac pump? I had the aspirator before i had anything so I never worried about air pollution or fire, just simply put it in that way cuzz nobody said it was bad. Thin film usually doesn't explode....

Is there no general rule like (sealed container and room) each hg of vac increases the temperature by 10 degrees? I get each solution has its own temps but I would assume vacuum pressure has some kind of a rule for increasing boiling points; something scientific to go by?

I believe most evap it off before putting it into the vac. Does the eth begin to condensate in the aspirator is that like your reclaimer? How do you ensure none of it reaches the pump?

Fade has a chart for etoh thc and a few others I believe under vacuum........Somewhere

What the heck are you even talking about...and why is there methanol in your etoh?

You can get a boiling point chart under vacuum, that wont tell you what temp on the outside you need to feed it to keep it at lets say 44 on the inside over the course of an evap if that's what I think your looking for. People buy a vac oven for that sort of "set temp"

Qwizo were talking about the benefit's of using a water aspirator rather than a vacuum pump as the source of suction in a vacuum assisted filtration. An apirator uses the venturi force of water, the solvent exits the vac line into water rather than your pump oil. #2 when your able to distill, lab distill "not copper tube distill" you can "renature" your denature ethanol in minutes under vacuum. It's called pulling a forshot and anyone who's made ethanol knows the first thing to boil out will be methanol so throw away the first boil. Simple as that, your everclear I can't buy where I live cost you way more than the 1 litre of pure 2d ethanol cost me. I don't tell other people to do it though it's kinda of plain basic lab tek. As long as your 2d is pure 85% etoh 15% methanol you can never end up with methanol in your end product because it boils before ethanol does..... I happen to have glassware from steam distilling years ago, so once i bought a refridgerated cold trap that was the end of me loosing solvent.
Except for when im filtering i don't like running the cold trap so i let the methanol go out my vac line, it cost 40 bux and you put it on your sink, vac pump = protected......

So you have a bunch of methanol cause your using 200 proof denatured? Instead of everclear......ooooh makes more sense(communication bro, we don't read minds)
Idk I'm still kinda confused, but I just woke up from my nap..y'all are heating and actually measuring vac just to pull liquid through a filter? nd acting like your evapping solvent off? Its just going down the filter unless your bringing into the conversation an enclosed system like it sounds your doing.....guess I just jumped in in the thread though

I have both enclosed and drain to atmosphere. Everyone seems to be draining to atmosphere which for me isn't really so good indoors, when i drain i drain through water. It's like a freebee super safety precaution i never knew i had. I was just broke so discovering an aspirator at the time was a gift. My fisher maxima c sit's right next to my jet pump and i still prefer not to use it unless im reclaiming solvent because I have to start up to cold trap. I don't bother recovering things like 50ml so that's where an apirator fit's the bill to fart the flammables out under water.

Qwizo there is no such thing as 190 proof where I live, id have to import it from another province. I didn't even know i could do that with 2d until i asked somebody at the lab why does your ethanol say 2d and what's in it that's not ethanol. They gave me the msds and said methanol and the guy wispered boil a few forshot's and you got pure ethanol. If i didn't jump on that i'd probably be a guy on the forum posting " can I winterize with bacardi" LOL

I repeat if your 2D is anything more than 15% methanol, fuck what im suggesting as there could be a tone of non volatile shit in there.