Seeing that Julian got such a huge response on the VOD i thought i would post here so it didnt get lost in all the replies
Ingredients so far
Aromatic naphtha 20-50%
Naphthalene 2-4%
Pseudocumene 0-1%
Glycol ethers 1-5%
Toulene 2%
University developed a revolutionary way to reduce cloud point in biodiesel using Urea Clathration. It is a process dating back to the 1940's that separates the saturated methyl esters from the unsaturated methyl esters. Clathration is the process of forming a crystline latice structure around a molecule. We can dissolve the urea into biodiesel containing methanol using heat and stirring, then on cooling the urea forms a lattice structure that traps saturated fatty acids. Saturated fatty acids are straight and fit perfectly inside the lattice. however unsaturated fatty acids are bent at the point of their double bond. They will not fit inside the lattice and are rejected. Once the biodiesel cools and the urea goes solid, the urea and saturated fatty acids can be mechanically filtered out of the low cloud point (and still liquid) biodiesel. The urea can be recovered later by water washing the thawed material from the filter, then evaporating the excess water from the urea. The residual methanol can be recovered in a vacuum or low temperature still to avoid overheating urea, which would turn it into ammonia
