The methanol can be recovered at the end of the process, or just from the glycerine by-product layer, since at least 70% of the excess methanol collects in the by-product and it's that much less material to heat. Unlike ethanol, methanol does not form an azeotrope with water and relatively pure methanol can be recovered - pure enough to re-use in the next batch. Methanol boils at 64.7 deg C, 148.5 deg F, though it starts vaporizing well before it reaches boiling point. Much of the excess methanol can be recovered after the process for re-use, simply by boiling it off in a closed container with an outlet leading to a simple condensor. But you also need to use an excess of methanol to push the conversion process towards completion - the total amount of methanol used is usually 20% or more of the volume of oil used, 200 ml per litre or more. See: Ethanol biodiesel Reclaiming excess methanolĭepending on the kind of oil you're using, it takes from 110-160 millilitres of methanol per litre of oil to form the methyl esters molecule. Methods and recipes for ethyl-esters biodiesel are available here, along with a How-To from a master home-brewer who has been making and using his own ethyl-esters biodiesel for years. It's not for novices - learn how to make biodiesel with methanol first. Making ethyl-esters biodiesel using ethanol is a tricky process, not as simple as making methyl esters with methanol. Identifying plastics Ethyl esters - making ethanol biodiesel Why can't I start with the Foolproof method? New!Build a 3-inch ethanol still Click HERE New! Make your own biodiesel (contd.) Save money! Making your own biodiesel will save you thousands. We haven't had a failed batch for 11 years! (But if you do have a failed batch we tell you how to rescue it and how to improve your processing so it won't happen again.) Learn how to make top-quality biodiesel that will pass all the quality standards requirements every time. This is the only book that thoroughly covers the entire subject of making your own biodiesel all the information at the Journey to Forever website and very much more.
See Durability of plastics table, and Identifying plastics. Check with the vehicle manufacturer and replace the parts with resistant synthetic parts (such as Viton B). Pure biodiesel will eventually devour any natural or butyl rubber parts in the fuel system (hoses and seals). Classics on organic growing, soil and health (full text online)
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