The Hive => Newbee Forum => Topic started by: M3Psych on September 25, 2003, 02:46:00 PM
Title: GBL/NMP + NaOH ----------> NaGHB + ?
Post by: M3Psych on September 25, 2003, 02:46:00 PM
Assume one has a very large quantity of GBL which has been adulterated w/ NMP (n-methyl-pyrrolidine). Reacting NaOH with this will obviously produce a quantity of GHB, but will the NMP react w/ the NaOH to form any nasties?
I had an idea to react the NaOH w/ the GBL/NMP, steam distill off the remaining unreacted GBL/NMP as their BP's are within 2-4 deg. C and evaporating the remainder to yield NaGHB powder (and probably some other heavy metal nasties). Then react the NaGHB w/ H2SO4 to go back to GBL and then distill.
My quandry is that the NMP would react w/ the NaOH to form a nasty, or form a product which would limit the reaction of the GBL w/ the NaOH.
Anyone?
Title: Your BP info is incorrect
Post by: acid_egg on September 25, 2003, 03:11:00 PM
steam distill off the remaining unreacted GBL/NMP as their BP's are within 2-4 deg. C
Thats is incorrect and irrelevant anyway, N-methyl-pyrrolidine has a much lower bp compared to GBL...~80C compared to ~200C for gbl. Why don't you distill the NMP off from the outset?
Title: The compound is most probably ...
Post by: moo on September 25, 2003, 04:07:00 PM
The compound is most probably N-methylpyrrolidone, not N-methylpyrrolidine. This has been discussed before.
Title: UTFSE, and find posts like this one
Post by: Rhodium on September 26, 2003, 03:56:00 PM
Post 83268 (https://www.thevespiary.org/talk/index.php?topic=6252.msg8326800#msg8326800)
(Rhodium: "Separation of NMP and Butyrolactone (GBL)", Chemicals & Equipment)