To make bio-diesel from vegetable oil, you get the oil from the restaurant, heat it up to about 120, mix it with methanol, and lye, the right proportions, shake it, let it settle, and you get glycerin at the bottom and the rest is all bio-diesel ready to go.
Quotes about glycerin (2 Quotes)
The clear layer is glycerin. You can mix glycerin back in when you make soap. Or You can skim the glycerin off. You can mix the glycerin with nitric acid to make nitroglycerin. You can mix nitroglycerin with sodium nitrate and sawdust to make dynamite. You can blow up bridges. You can mix nitroglycerin with more nitric acid and parafin and make gelatin explosives. You can blow up a building, easy. With enough soap, you can blow up the whole world.