there is a liquid which contains gbl, Methylpyrrolidon, and Dimethylester. i think the Dimethylester is a substace which is in german called "Maleinsäuredimethylester"

i want to know more about these substaces and how to extract the glb from this liquid?

Separation of GBL and NMP (N-methylpyrrolidinone) has been discussed before, plug in a few of these synonyms in TFSE and see for yourself.

and whats about the Dimethylester?

Maleic acid dimethyl ester maybe?

The same thing holds true for NMP as for dimethylmaleate - after complete hydrolysis to the free acids, only the GHB re-esterifies with ease in a slightly acid aqueous solution, forming GBL (which can then be steam distilled off), while the amino-acid from NMP and the maleic acid stays in their acid form and will be pretty non-volatile.

this should be in another forum

Oh, would you care to tell the audience which forum the extraction of GBL from a cleaning mixture should be placed, if not in

Chemicals & Equipment - Construction of lab equipment, sourcing and extraction of chemicals

You specifically asked for the reason why some bee thought the discussed topic belonged elsewhere - and I thought since nobody replied during the last few months, I would be allowed to post my opinion about the subject...

In case it was irony; why didn't you use a smiley then? (

Post 462395

(Rhodium: "The last part is incorrect.", Chemicals & Equipment)


Anyway: if you think a thread is too old to take up any more useful information - why don't you just close it??

A (at the risk of getting bad karma again   )