Im sure this has been covered many time before but I want to know what the absolute lowest temp for reaction? I have been making 15 gallons at a time and normally been heating to 120 degrees, mixing 30 minutes and settling 2 hours. This has always worked well for me. Now that winter is here it takes considerable time to heat the oil to 120. Last week I heated to around 100 degrees and it seemed to work just fine. Got a nice layer of gly as usual. Trying to save time by not having to heat as long in winter. Anybody ever reacted at temps below 100? Thanks in advance..........Maxx

 

Years ago I tried different temps, and found I didn't get COMPLETE conversion below 130 deg. If you go to low of a temp you may have unconverted oil in your bio.

 

Yep! I have been told the same from others. Sounds like I need to keep the temps up just for insurance. Thanks for the reply....Maxx

 

Just don't go above ~148, or you will begin boiling out the methanol (save that step for later)