Has anyone made soap from the glycerine from virgin oil derived Bio? What color is it? What does it smell like? If you make biodiesel this way, how much glycerine would you yield? Thanks
Yes. The guy I brew with uses oil that's for all intensive purposes "virgin".
It comes from a factory where it's only use has been to sprinkle over the tops of cookies so that salt adheres to them.
The oil is a mixture of Canola oil and other oils.
The glycerin is usually very light in color and yields some great looking soap.
Yield is something interesting...we always get less Glycerin out than the methanol we put in.
In other words, our yields on the oil are greater than 100%.
I have no explanation as to why this occurs, but it does with extreme regularity.
Here's a link to some pictures of the soaps made from this glycerin.
Makes GREAT soap!
This summer I did several local demonstrations on biodiesel and ended up with lots of new oil glycerin.
I made some soap from that glycerin, and as Graydon says the glycerin is much lighter in color and makes for some beautiful soaps.
The big difference in glycerin from new oil, other than the lighter color, is the ratio of soaps in the glycerin. This is a big deal for bar soaps.
You might think the more soap in your glycerin the better. In most cases this is true for liquid soap. But not in bar soap, if the original whole oils are unsaturated. The liquid at room temperature oils will make softer soaps that get deposited in the glycerin. To harden the bars it takes more saturated whole oils or fatty acids and in some cases makes hot processing the bar soap more difficult because the soap can take on a taffy like texture, that can be overcome with some sodium lactate.
Back to the subject.
Liquid soaps from new oil glycerin can shift to a nice golden color but may need some lathering ingredients added. Tim has some really beautiful liquid soap from his new oil glycerin.
Because of the high solvent to soap ratio, glycerol being that solvent, the soap tend to be much more transparent. In fact in some cases you can add transparency to bar soap without the need for other alcohols or sugars. Liquid soaps just shimmer.
If you have access to new or out of date oils for your biodiesel your soaps will be the envy of those of us that have to settle for the used stuff.
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The photo shows the yield difference in new oil versus very used oil. The oil I use is farm pressed crude oil. Crude oil might not be a good as new store bought oil because it has not be degummed, caustic striped, bleached, steam cleaned, or deodorized. Extra virgin?
Liquid soap made from canola glycerin is brown, or yellow if you hold it up to bright light. Canola soap smells like soap and fresh ground grain. Not a bad scent at all, but not what most people expect from soap. Soy soap not so good. Not sure why.
Thanks for the info...very helpful
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