Is it possible to produce BD without soap as by-product? I wanna thank you "Tilly"

I made 208 lt batch. I got perfect two layer (BD and glycerol)

I.stage
208 - lt oil
16,5 lt methanol
300 ml H2SO4
II. Stage
29,5Lt methanol
Time 2 hours: T: 55-60 C Ph:9,5-10; SG: 0.885
First Washing
No soap trace in washing water.

please let me know your comments.

6,7 gram naoh per liter oil.

Hello erdem-ozcan

Congratulations on your success and you are welcome for any help I may have given you.

What was the titration of the oil to start?

There are two causes for soap production during the reaction.
* Neutralizing FFA's with NaOH/KOH
* The side reaction that makes soap from biodiesel/Veggie oil during the base reaction.

The Acid/Base procedure eliminates most of the FFA's so this cause of soap production will be virtually eliminated.
You can not stop the side reaction, but this seems to be a minor reason for soap production.