Example of Methamphetamine Isomers Separation

Sjeik

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Sen on oltava tällaista..

FkJsC5vV1D
FkJsC5vV1D
 

lalalander

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Does using a larger amount of water so that the mixture does not turn into a paste affect the solubility of the L-Meth-tartrate salt?

Because it's almost impossible to work with the vacuum filter when it's like a paste.

Maybe I should add freebase slowly to avoid amorphous paste solid?
 

Acab1312

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Suosittelen pakastinta. Tässä tapauksessa mitä kylmempi, sitä parempi. Lämpötiloja ei koskaan mitattu, säilytän metanoliani aina pakastimessa.

-Polariteetti (polarimetrillä testattu) yhden läpikäynnin jälkeen.

- H20 (68-73 % d)

- Metanoli (71-76 % d)

- Rusznak-prosessi, bentseenin korvikkeena tolueeni (ei vieläkään onnistunut raseeminen).

- Pope - Peachey : h20/kloorivetyhappo.
(65-80 % d on riippuvainen ajasta).

Suosin menetelmää, jossa käytetään h20:ta, koska se on kustannuksiltaan, ajallisesti ja yksinkertaisuudeltaan parempi.

Toivottavasti pystyin auttamaan.
 

lalalander

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Does using a larger amount of water so that the mixture does not turn into a paste affect the solubility of the L-Meth-tartrate salt?

Because it's almost impossible to work with the vacuum filter when it's like a paste.

Maybe I should add freebase slowly to avoid amorphous paste solid?
 

William Dampier

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You can heat the mixture, obtain a solution (add a little solvent if slight heating doesn’t help), and then crystallize it more controllably with slow cooling to get a more easily filterable fraction.
 
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