Bwiti (PVC-Analog Taste-Tester)
06-04-03 11:02
No 437737
       NaOH / Parsley Seed Oil..  Bookmark   

Lets say someone mixed aqueous 5% NaOH with parsley seed oil.. Which layer will be the allylbenzenes?? Both are of about the same darkness..
Love my country, fear my government. 		 
 
 
 
    Barium
(Hive Addict)
06-04-03 17:02
No 437777
       The viscosity will easily reveal which layer...  Bookmark   

The viscosity will easily reveal which layer is the aqueous and the organic. Watch where the aqueous solution goes when you mix the liquids. It shouldn't be that hard.
Freaky 		 
 
 
 
    hypo
(Hive Addict)
06-04-03 18:18
No 437784
       why?  Bookmark   

> Lets say someone mixed aqueous 5% NaOH with parsley seed oil..

why would you do that? this method seems pretty useless:

the non-propenylbenzene parts of parsley seed oil were added to
dil. NaOH in a testtube. the whole lot was shaken like crazy.
after few minutes two phases separated. => practically no purification. 		 
 
 
 
    Bwiti
(PVC-Analog Taste-Tester)
06-04-03 22:59
No 437813
       hey..  Bookmark   

"this method seems pretty useless"

  Well, the NaOH layer took on a dark color when mixed with the parsley seed oil, so some garbage must have been extracted from it.. It worked for me.
  Btw, I added a drop of the top layer to a test tube half-filled with dH2O.. The top layer's the substituted allylbenzenes.
smile
Love my country, fear my government. 		 
 
 
 
    Lilienthal
(Moderator)
06-04-03 23:18
No 437817
       Like always if there are no halogens in the...  Bookmark   

Like always if there are no halogens in the molecule... smile 		 
 
 
 
    hypo
(Hive Addict)
06-04-03 23:22
No 437818
       nah...  Bookmark   

> Well, the NaOH layer took on a dark color when mixed

yes, in my experiment too. that means nothing. the layer
did not get significantly smaller. 49% or 50%, why bother?

(otoh, if it makes u happy - do what ever you want...) 		 
 
 
 
    hypo
(Hive Addict)
06-04-03 23:25
No 437819
       huh?  Bookmark   

and oxygen, sometimes, isn't it? 		 
 
 
 
    bones
(Hive Bee)
06-05-03 09:08
No 437915
       sorry.. this was already answered :D  Bookmark   

so i deleted my post 		 
 
 
 
    Aurelius
(Hive Addict)
06-05-03 17:43
No 437986
       NaOH  Bookmark   

Bwiti, they are right about the amount of impurities being removed.  It's very small, but it's ok.  however, the idea that the NaOH might cause some polymerization (with a little heat or if it sits overnight) makes me think that it's not the best idea.  Don't wash anything- distill first, then wash to help clean the final product.  Be sure to dry your product and then do a final distillation. 

if done correctly (and if you starting material was worth the money) you should get 98%+ purity.