Hello Paul and all ><<Can I use cow's milk fat to make biodiesel?>> > >Keith, Brent, > >Butter contains water, its an emulsion of water in milk fat which is >accomplished during the churning, can't remember offhand the % of water >present. Ghee or dehydrated butter would be a better feedstock >One of the tests on butter in dairy labs is water content. The water is >boiled out of a known weight of butter. End result is a golden liquid with a >crumb-like deposit in the bottom of the flask (could be proteins, milk >solids and salt). Filtering would be required or a more gentle heat >treatment. The residue from the moisture test is then used for the salt >test. >The salt may be a factor to be taken into account, better to use unsalted >butter. > > > >From: Keith Addison <[EMAIL PROTECTED]> > > >Hi Brent > > > > > >When you say "cow's milk fat" you mean butter? ><snip>
Thought I had to ask because if he'd meant butter he'd probably have said "butter". Maybe. >Ghee would be the purest form of milk fat available. >Whilst cheese contains up to 30% fat in some varieties the fat would have to >be extracted by solvent extraction/digestion. >Milk from currently used Freezian cows runs at about 4% butterfat. Jerseys get rather more. So do Dexters I think - quite a lot of cattle breeds do. Also water buffalo, which produce it and thrive on a diet a Friesian would starve on. >the traditional method of testing milk for butterfat involved the use of >near concentrated sulphuric acid and centrifuging to release the fat from >the proteins and allow it to accumulate in the neck of a graduated test >flask, this was the Babcock test. >Today Lab instruments, made mainly by Foss are used to analyse milk. >Other mammals besides cows yield much higher fat contents in their milk. >Sheep milk is higher in fat content and Wallrus milk is about 50% fat I seem >to remember. Can't imaging farming/milking the latter. > >regards Paul Gobert. You never milked a walrus, Paul? Good grief man, what sort of school did they send you to??? These young people of today, they don't know from nothing. :-) Nice info, Paul, thanks - and I'm actually pleased to know about walrus milk. Ghee would be better, but anyway, the answer is Yes, you can make biodiesel from butter, though I'm not sure why - the prospect of biodieselled toast and strawberry jam lacks appeal. Though does Europe still have a butter mountain? Probably - probably the US too. And Oz/NZ? dewatering the butter is easy enough. Take 400 g of butter, heat (indirect) to 60 deg C, maintain for 15 minutes. It sort of clarifies and a bunch of thick whitish gunk falls out at the bottom (buttermilk?). You're left with 315 g butter and 100 g buttermilk. The butter titrated at 0.6 ml. Butter's stoich ratio for methanol is a bit higher than most oils at 13.6% - see http://journeytoforever.org/biodiesel_meth.html How much methanol? - so use a little more methanol than usual, 24-25%. Single-stage transesterification at 55 deg C produced a nice-looking butter biodiesel, with the by-product glyc deposit a clear yellow, almost the same colour as the biodiesel. Haven't washed it yet but I don't expect any problems. This was salted butter, but it doesn't seem to have made any difference. Most in the by-product I expect, and it'll wash out anyway. Regards Keith > > >The link works. > > > > > >On Wednesday, August 27, 2003, at 04:22 AM, Brent S wrote: > > > > > Is the process the same? Your link didn't work for me. > > > Brent > > > > > > > > >> From: Neoteric Biofuels Inc <[EMAIL PROTECTED]> > > >> Reply-To: biofuel@yahoogroups.com > > >> To: biofuel@yahoogroups.com > > >> Subject: Re: [biofuel] milk fat > > >> Date: Tue, 26 Aug 2003 00:27:07 -0700 > > >> > > >> Yes. > > >> > > >> http://www.ecoliving.co.nz/Ecoliving/mag/issue4/Biodiesel%20- > > >> %20The%20Fuel%20of%20the%20Future.htm > > >> > > >> > > >> On Monday, August 25, 2003, at 07:56 PM, carreragt41991 wrote: > > >> > > >>> Hi, > > >>> Can I use cow's milk fat to make biodiesel. > > >>> Thanks ------------------------ 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/
