Biopowered - vegetable oil and biodiesel forum

Biodiesel => Chemistry and process => Topic started by: willbuild on October 06, 2015, 12:34:14 PM

Title: 5% water wash
Post by: willbuild on October 06, 2015, 12:34:14 PM

What would be the least amount of glycerol that should be present when doing the wash?
After the wash I settle out the glycerol then do an acid wash followed by 3 or 4 water washes.

Title: Re: 5% water wash
Post by: nigelb on October 06, 2015, 04:09:03 PM

The minimum amount would be what's left after your second stage reaction...assuming you employ a two stage reaction.

Title: Re: 5% water wash
Post by: willbuild on October 06, 2015, 05:57:12 PM

Yes I do 2 stagesand had 85% conversion on 1st stage.
I've done a 5% wash with just the glycerol from the 2nd stage and its now settling.
Sample is murky but not an emulsion.

Title: Re: 5% water wash
Post by: nigelb on October 06, 2015, 07:23:02 PM

Murky orange juice is the consistancy you're looking for. So long as there is seperation in your jug sample, you're good to go

Title: Re: 5% water wash
Post by: willbuild on October 06, 2015, 08:25:42 PM

Seperated quite quick, turned out that there was about   8% glycerol in the volume of bio.
It's now had an acid wash and I'll leave overnight.