Create biodiesel from oleochemicals by-product

How to produce biodiesel from oleochemical byproduct palm fattig acid destillated(PFAD)?

We can make biodiesel from PFAD. First we put PFAD and Methanol in appropriate ammount with some catalyst in a reactor and heat it all together for a while. After it change it's colour to braun colour, we put some sample to testing it's free fattig acid's content. If the free fattig acid content low enough so that it could not damage parts of our machine when we use it, then we can stop the process. For more information about biodiesel you could contact me.