09-25-03 14:46
No 461065
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?
(Hive Addict)
09-25-03 15:11
No 461072
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?
(Hive Bee)
09-25-03 16:07
No 461085
The compound is most probably N-methylpyrrolidone, not N-methylpyrrolidine. This has been discussed before.
fear fear hate hate
(Chief Bee)
09-26-03 15:56
No 461263
Post 83268 (Rhodium: "Separation of NMP and Butyrolactone (GBL)", Chemicals & Equipment)