Random - 26-9-2010 at 00:04
Can I extract vanillin from vanillin sugar? The only ingredients are vanillin and sugar.
bahamuth - 26-9-2010 at 00:28
You can, but wouldn't it be kinda expensive?
Use as dry ethanol as possible, sucrose is not very soluble in it; vanillin will dissolve nicely by the ethanol, filter and evaporate. (and
crystallize from water if greater purity is needed)
Random - 26-9-2010 at 03:17
Well, it's expensive, but how to get it except by that? How much yield could I get with that?
Thanks for this option of extraction 
bahamuth - 26-9-2010 at 03:23
I guess that the vanilla sugar contains somewhere from 1-5% vanilin/ethyl vanillin, and you should be able to get most of it out of the sugar, but why
not just buy it on ebay?
http://cgi.ebay.com/VANILLIN-100gm-Chemical-Methoxy-Hydroxy-...
Random - 26-9-2010 at 10:42
The problem is that I can't buy from ebay in my country so I will have to do it with ethanol. Is there alternative route with vanilla flavoring that
you can buy in shops?
bahamuth - 26-9-2010 at 11:24
How much if the stuff do you need, 5, 10g, or in the hundreds of grams?
Depending on your needs there is also a fairly easy way to prepare it from isoeugenol or eugenol, even from sawdust but the yields are apparently very
low.
"The Preparation of Vanillin from Eugenol and Sawdust", in: Journal of Chemical Education 1977, 54 (12), S. 776–778."
Random - 26-9-2010 at 12:35
I need just a few grams to make zingerone from vanillin and acetone. I should also look for clove oil to get eugenol.
bahamuth - 26-9-2010 at 14:19
Not to derail this thread but also made some zingerone a while back.., had a hell to separate it, oxidized in air and polymerized (or something) in
UV/florescent lighting.
not_important - 27-9-2010 at 12:59
If you have Middle Eastern/North African dry goods stores around you, you may find they stock bottles of pure vanillin.
Random - 2-10-2010 at 00:19
I wil then try to make that unsaturated ketone that is used to make zingerone.
Could I separate vanillin from sugar by dissolving all sugar in water (solubility: 2000g/L) and vanillin will be left out of solution. I would loose
1g of vanillin per 100ml of water.
bahamuth - 2-10-2010 at 01:33
Read up on the solubility of your compounds if you are trying to separate them by crystallization. Vanillin is very soluble in water so dissolving
your vanillin/sugar mixture in water will not work. As I said before, use ethanol, or even better when I think about it, ethylacetate or similar
esters.