>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 ------------------------ 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/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://webconx.green-trust.org/2000/biofuel/biofuel.htm List messages are archived at the Info-Archive at NNYTech: http://archive.nnytech.net/ To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
