Pieter, I suppose you could heat it 'til it smokes and be relatively secure in the belief that you done sumptin' wrong. (Been that. Done there.)
I couldn't tell you precisely what temperature is the cut off point to prevent degradation The MeOH won't evaporate until the composite liquid (alcohol and bioidesel) reaches ~160*F. (Sorry. It's an "American thang.") That would mean a temp rise of ~40*F after a settled reaction - presuming that you're using an insulated reactor or settling tank. I wouldn't suggest a pot still due to the fact that the alcohol has to rise through a thick layer of biodiesel before it can escape. A thin film evaporator would be more efficient, both in fuel expended and in keeping the temp of the biodiesel elevated for a shorter period of time. Imagine a slightly inclined, enclosed, stainless-steel, rectangular box, with the bottom being a "hot plate" that a thin film of biodiesel flows over at an adjusted rate. At the top of the box is an exhaust vent that the evaporated alcohol vents out of and then into a condensor. That bottom "hot plate" should actually be a chamber that is filled with a circulating medium - a heat exchanger - rather than a direct form of heat. The returning, hot, biodiesel can be used to heat the reactor and or the WVO in a settling tank, in order to achieve better energy efficiency. Sometimes you have to build a city to handle one product. Todd Swearingen ----- Original Message ----- From: "Pieter Koole" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Wednesday, October 29, 2003 5:10 PM Subject: Re: [biofuel] filtering process > Hi Todd, > When I try to recover methanol out of the BD, untill what temperature can I > bring the BD at maximum, without "damaging" the BD ? ( Can it be damaged ? ) > > Met vriendelijke groeten, > Pieter Koole > Netherlands > > The information contained in this message (including attachments) is > confidential, and is intended for the addressee(s) > only. If you have received this message in error please delete it and > notify the originator immediately. The unauthorized use, disclosure, > copying or alteration of this message is strictly forbidden. We will not be > liable for direct, special, indirect or > consequential damages arising from alteration of the contents of this > message by a third party or in case of electronic communications as a result > of any virus being passed on. > > > ----- Original Message ----- > From: "Appal Energy" <[EMAIL PROTECTED]> > To: <biofuel@yahoogroups.com> > Sent: Tuesday, October 28, 2003 9:27 PM > Subject: Re: [biofuel] filtering process > > > > James, > > > > Almost no one is dealing with methanol recovery at the home scale. > > > > Best time to recover it is after FFA/glycerin recovery if the fertilizer > and > > FFA (fuel) co-products are going to be used elsewhere. Alcohol recovery at > > this stage also means a lesser volume that has to pass over the > evaporator, > > erego a lesser energy input to recover the same volume of alcohol. > > > > If the expectancy is to "just dump" the stuff, then the alcohol should be > > recovered prior to dumping. > > > > There aren't any "in betweens." > > > > Todd Swearingen > > ----- Original Message ----- > > From: "James Slayden" <[EMAIL PROTECTED]> > > To: <biofuel@yahoogroups.com> > > Sent: Tuesday, October 28, 2003 12:07 PM > > Subject: Re: [biofuel] filtering process > > > > > > > Todd, > > > > > > Are you allowing the BD to settle up over that time, or are you doing > meth > > > recovery as soon as the drum is filled? I was wondering how people were > > > dealing with the meth recovery on a smallish level. I will be getting > > > some plans for a solar still using 55gal drums and I am wondering if > that > > > will be useful for glyc meth recovery. > > > > > > James Slayden > > > > > > On Mon, 27 Oct 2003, Appal Energy wrote: > > > > > > > Doug, > > > > > > > > In response to what type of filter is best to use in your quest? > > > > > > > > The simplest and least expensive (more often than not) is "time." > > > > > > > > Time as a filter?????? > > > > > > > > A good bit of glycerin can remain solute in biodiesel, as can much > > biodiesel > > > > remain solute in the glycerin cocktail, long after a substantial > waiting > > > > period. Hence the need to wash the biodiesel and the wise choice of > > > > aggregating the glycerin cocktail batch after batch, letting the > > remaining > > > > fraction of biodiesel "settle up" over time. > > > > > > > > What you might expect out of 55 gallons of glycerin cocktail over a > two > > week > > > > period of time is a "settling up" of perhaps 4-5 gallons of biodiesel. > > > > > > > > Nature (gravity) is a pretty good filter in this case, if you can > afford > > her > > > > the storage capacity and time. > > > > > > > > Todd Swearingen > > > > > > > > ----- Original Message ----- > > > > From: "Doug L" <[EMAIL PROTECTED]> > > > > To: <biofuel@yahoogroups.com> > > > > Sent: Monday, October 27, 2003 1:25 PM > > > > Subject: [biofuel] filtering process > > > > > > > > > > > > > We have succeeded in our first batch and all is running well. We > > seperated > > > > > the biodiesel from the glycerine the day after the reaction and then > > found > > > > > that there was still lots of seperating to occur. We are getting > down > > to > > > > the > > > > > end of the batch and finding that the fuel is mixed with quite a bit > > of > > > > > glycerine and needs some serious filtering. We have tried a 10 > micron > > > > filter > > > > > and a big cone filter with cloth filters. These do not seem do be > > doing > > > > the > > > > > job. We need something that will do a good job filtering in an > > efficient > > > > > amount of time. Any suggestions? > > > > > Doug Loewen > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > > > http://journeytoforever.org/biofuel.html > > > > > > > > > > Biofuels list archives: > > > > > http://archive.nnytech.net/ > > > > > > > > > > Please do NOT send Unsubscribe messages to the list address. > > > > > To unsubscribe, send an email to: > > > > > [EMAIL PROTECTED] > > > > > > > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > > http://journeytoforever.org/biofuel.html > > > > > > > > Biofuels list archives: > > > > http://archive.nnytech.net/ > > > > > > > > Please do NOT send Unsubscribe messages to the list address. > > > > To unsubscribe, send an email to: > > > > [EMAIL PROTECTED] > > > > > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > > http://journeytoforever.org/biofuel.html > > > > > > Biofuels list archives: > > > http://archive.nnytech.net/ > > > > > > Please do NOT send Unsubscribe messages to the list address. > > > To unsubscribe, send an email to: > > > [EMAIL PROTECTED] > > > > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Biofuels list archives: > > http://archive.nnytech.net/ > > > > Please do NOT send Unsubscribe messages to the list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > > > Your use of Yahoo! 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