How do i make bio diesel from used sunflower/vegetable oil?

i have seen it on 'BBC 2' on a program called 'it's not easy being green', they boiled up the used vegetable or sunflower oil with a chemical (dont know what chemical) to produce bio-diesel.


they say that anyone can do it, i have done some rresearch and there are many many different palns online for converting bio-diesel, but i have seen none that were as simple as the BBC program.


it is about 50% - 60% cheaper than diesel and is legal.





i would love to know how to convert used sunflower/vegetable oil into bio-diesel.How do i make bio diesel from used sunflower/vegetable oil?
Okay the main reason you cant bung it in your car is because it isnt runny enough. So all you have to do is thin it out a bit.





Start by finding the runnyest oil you can find (just a bit of research is all that it needs) also look on the bottles of spray oils where you spray oil onto fod from a spray bottle. These will have ingredients in their that act as thinners. Bycycle oil may act as a good thinner?





Once you have your oil just simply mix it with diesel try mixtures first off try a 25% mix then 50% and 75% apparantly they work quite well:





http://www.ravenfamily.org/andyg/vegoil.鈥?/a>





This website is a fantastic resource and you dont need any chemical knowledge. Just follow the guidelines and you should be fine, if your oil mixture is runny then it shouldnt mess up the cars engine at all. As you get more confident, try mixtures of 55,60 to find the optimum mixture for you. But for now keep it low try 25% oil for starters.





With this alone you save 拢15 every time you fill the tank.





If you want to try some chemistry the Belgium patent out on this suggests hacking off some chemical groups in order to make the oil more runny. They suggest using ethanol with you can basically get from vodka, for purer mixtures of ethanol put the vodka in a plastic container in the freezer and as soon as a big lump of ice is formed pour the remaining liquid onto your oil, this should be ethanol. Ethanol freezes at a higher temp than water so thats how you can sort of purify it a little.





Hope that helps!How do i make bio diesel from used sunflower/vegetable oil?
lol,,,,,,,,some muppet reckons he used to run his car on chip fat....!!!!!!





i said , 'do you put salt n vinegar on it, n all '





lol
Here is only a suggestion:





First I would filter the oil to remove particulate matter. It would be possible to distill it to purify it more. This could be distilled with or without water. If it is distilled with water the distillate would probably need to be separated into the water and oil phases. Hope this helps.
If you google ';biodiesel recipe'; with google - you will find a variety of decent ones.





Mostly it goes like this:--Obtain WVO (Waste vegatable oil), if you use pure oil then you can often run it straight into the tank.





filter out any lumps and gritty bits





warm oil to around 45 degrees C


Add Sodium Hydroxide (lye)


Add methanol OR ethanol OR (worse case, methylated spirits)


Stir for a few minutes





Allow to settle into three layers.





Middle layer is the one you want - bio-diesel


top and bottom layers are soap and glycerine - both harmless by products.





Different recipes call for different amounts of Lye and methanol - stick to which version you prefer.





Used chip fat once refined as above is PERFECTLY adequate for making into biodiesel - and many restaurants will GIVE you the waste oil for free :)





Mark
Look the stuff that comes out the ground is bio oil....in fact thats what they make margarine and so called low fat spreads from ( coal was used at one time).





Basically take your veg oil and add a small proportion of methylated spirits......probably no more than 10%.





You'll get done for evading fuel tax of course