Making pure glycerin

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Hi everyone! First time posting and I’m not sure if it’s even in the right place! Lol apologies if I am!

I am relatively new to soap making but I am looking to extract pure glycerin from soap, like the kind of glycerin you buy to make your own glycerin soap from scratch mixed with alcohol etc.

Now when I Google how to extract and bottle pure glycerin, the results that show are to use
coconut oil,
olive oil,
lye solution,
salt

Now this is probably me just being a noob but could someone please tell me whether this would be fractionated coconut oil or 76 degree coconut oil?

I can’t find the answer anywhere and I would really appreciate any advice or guidance in this process from you lovely soapers who know what your talking about! Lol

thanks in advance!
 

KimW

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Welcome!

I think I've seen this discussed a few times. Searching for "glycerin from soap", brought up this most recent thread that might be of interest, though I'm sure there are more threads here on SMF:
 
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Thank you KimW for replying!
I have just checked that post and it still doesn’t mention which type of coconut oil you should use.

I am beginning to wonder though if it is worth the effort, I just felt it would give my soap an extra touch, that I make and extract the glycerin myself for the final glycerine soap product.

But thank you very much! I might have to have a dig around on here and see if I can find any mention of the answer :)
 

ResolvableOwl

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I'm a bit confused what is your goal. Do you want a soap with a lower glycerol content than results naturally from saponification? Or do you want to add extra glycerol to the soap? Or do you want to isolate glycerol for separate usage?

The ingredients in the first post might suggest the former. Search for “salting out”, a technique to make a soap that is low in residual glycerol.
If you want to gather glycerol itself, then the soapy watery brine with a few % of glycerol, that you can isolate from soap, is about the worst mixture to start with. Glycerol is notoriously difficult to clean up (you can't distill it), doubly so with household means. You're definitely better off with just buying commercial glycerol. Unfortunately, many within the DIY scene are quite inconsequential with nomenclature. Yes, the salting-out waste brine contains most of the glycerol from saponification, but that doesn't mean that there is a lot of glycerol (by percentage) in there, justifying recovery – but that doesn't stop folks to call it “glycerol” although it might at best contain some 10% of glycerol, the rest being water, salt, and residual soap.
 
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Thank you ResolvableOwl for replying.
I did want to extract glycerin for a separate use.
So really it sounds like a lot of effort for a little to no quality liquid anyway.
I will just purchase it, it seems like the only way to ensure I’m going to be using a quality product.
Thank you very much for your advice! :)
 

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