Anyone tried using any anhydrous salt like sodium sulfate to dry the oil/biodiesel? It may be cheaper than heating. JB
--- Keith Addison <[EMAIL PROTECTED]> wrote: > >Dear Keith and Tim, > > Brine is normally used for breaking up an > emulsion. If oil and water > >phases have formed a strong emulsion they will > not separate by keeping. > >Addition of saturated salt solution increases the > density of the aqueous > >phase hence the difference between the densities > of oil and water phases is > >increased. As a result the emulsion breaks up. But > this does not mean that > >the oil phase is dry. Further drying is possible by > stirring and heating > >the oil at 110 C. > >levent > >izmir, turkey > > Hi Levent > > We know about using salt to break an emulsion - more > info here, from > Mark (though I think it was Todd who first detailed > it): > > Bubblewashing 101 > > By Maria Alovert (Girl Mark Fire) > > Equipment Needed > > The Bubblewashing Process > > Wash Problems and Quality Control > - Emulsification > - Emulsion Explained > - Alternatives > - Predicting Wash Problems > - What A Wash Should Look Like > - Dealing With Severe Emulsion Formation > http://journeytoforever.org/biodiesel_bubblewash2.html#severe > > Re drying, two ways, usually: > > http://journeytoforever.org/biodiesel_mike.html#water > - heating to 100 deg C, and then higher; > > http://journeytoforever.org/biodiesel_aleksnew.html#aleksdry > - heat to 60 deg C and settle. > > It's a bit controversial though, 60 deg C and > settling just doesn't > seem to work for some people (like Mark). But Todd > said this recently > on the Biofuel list: > > >100*C is the boiling point for water. To get rid of > water by the boiling > >method not only do you have to expend massive > amounts of energy, but the > >water wil inevitably atomize and stay mixed with > oil to some degree, even if > >you boil the beejeebers out of it. > > > >Your best bet is to heat the oil to ~130*F (55*C) > and let the water settle > >out. > > > >No point in wasting time, energy or creating > problems. Just be sure the > >settling period is sufficient. The deeper the oil > resevoir the longer the > >settling time. (55 gallon drum, maybe 24-36 hours. > 1,000 gallon tank, maybe > >48-72 hours.) > > > >Todd Swearingen > > We usually recommend trying 60 deg C and settling > first, and if it > doesn't work for you then use higher heat. > > Meanwhile Biofuel list member Terry Lohnes has been > working with a > different salt: > > >Hello all, > >This problem is something I noticed right away when > I started > >reading into how biodiesel is made, and the > pitfalls associated with > >the process (i.e making soap instead of fuel.) As > a chemical > >engineer, I figured there had to be a way to > separate the emulsified > >oil chemically. Right now, I'm experimenting with > separation of 80% > >soybean oil, 20% water (emulsified in a blender) > using a CaCl salt > >solution at varying concentrations and > temperatures. CaCl, better > >known as driveway ice melting salt, is cheap and > easy to come by > >even in Washington State where we don't get much > ice. I've already > >done some preliminary separations in jars, and it's > AMAZING how fast > >you get separation. CaCl is very low on the > toxicity scale, and I'm > >hoping the minimum concentration and temperature > will be low, saving > >both energy and time. I would appreciate any > feedback; I have a > >picture of the apparatus I'm using in case anyone > is interested. > > > >Terry Lohnes > > We're not working on any of these things currently > because the oil > we're getting doesn't have any water. Lucky us. > > regards > > Keith Addison > Journey to Forever > > > >----- Original Message ----- > >From: "Keith Addison" <[EMAIL PROTECTED]> > >To: <biofuel@yahoogroups.com> > >Cc: <biofuels-biz@yahoogroups.com> > >Sent: Thursday, August 07, 2003 6:57 PM > >Subject: [biofuels-biz] Brine wash to dry WVO? > > > > > > > Sounds like an interesting idea, anybody tried > it, or heard of it being > >done? > > > > > > Tim wrote to me direct, he's not a list member, > though I suggested he > > > join, so you might cc any responses to him. > > > > > > Best > > > > > > Keith > > > > > > > > > >From: "Tim Desson" <[EMAIL PROTECTED]> > > > >To: [EMAIL PROTECTED] > > > >Subject: biodiesel > > > >Date: Wed, 30 Jul 2003 08:07:43 +0000 > > > > > > > >Dear Keith, > > > >just been reading about the fantastic biodiesel > stuff on the web! > > > >I'm going to give the foolproof process a go > (when my broken collar > > > >bone mends!) > > > >I was wondering if a brine wash has been tried > to dry the WVO before > > > >transesterification (I'm a research chemist, > and this is often done > > > >on wet solutions of organic solvents to dry > them, the water in the > > > >fat gets salted out ) > > > >I look forward to hearing from you > > > >Tim Desson > > > >Wokingham, UK > > > __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for Your HP, Epson, Canon or Lexmark Printer at Myinks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/l.m7sD/LIdGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> 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/
