I read somewhere recently on this forum about someone doing a glycerine pre wash on their oil before doing the full reaction. I tried to find the thread again but couldn't easily locate it.
In typical fashion, I just thought I'd give it a go at the spur of the moment and see what happened.
I heated up the oil to about 40C, turned on my mixer and added about 15% of the oil volume (180L) of room temp glyc and mixed for about 30 min.
I drained it off about 24 hrs later as I ran out of time to do the proper reaction that I had intended to do on the same day while the oil was still hot. It was noticeably thicker and darker than when it went in.
That was several days ago now and I just titrated the oil tonight and it came in at 0.5. Normally this oil titrates at about 2 - 3, which seems amazing on face-value. But then I thought about it and it will only seemingly save about 300g of KOH in this instance.
So is that the reason most people don't bother with it? Extra time and messing around and that it will only save (in this case) 300g of KOH? And in my case, wasted more electricity as now I need to heat the oil up for a second time which can use up to 4 kWh of electricity to go from 15C - 50C.
In typical fashion, I just thought I'd give it a go at the spur of the moment and see what happened.
I heated up the oil to about 40C, turned on my mixer and added about 15% of the oil volume (180L) of room temp glyc and mixed for about 30 min.
I drained it off about 24 hrs later as I ran out of time to do the proper reaction that I had intended to do on the same day while the oil was still hot. It was noticeably thicker and darker than when it went in.
That was several days ago now and I just titrated the oil tonight and it came in at 0.5. Normally this oil titrates at about 2 - 3, which seems amazing on face-value. But then I thought about it and it will only seemingly save about 300g of KOH in this instance.
So is that the reason most people don't bother with it? Extra time and messing around and that it will only save (in this case) 300g of KOH? And in my case, wasted more electricity as now I need to heat the oil up for a second time which can use up to 4 kWh of electricity to go from 15C - 50C.
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