Example of Methamphetamine Isomers Separation

[Sjeik]

Trebuie să fie așa...

 

[lalalander]

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]

Aș recomanda congelatorul. În acest caz, cu cât mai rece, cu atât mai bine. Temperaturile nu au fost măsurate niciodată, eu întotdeauna îmi păstrez metanolul în congelator.

-Polaritatea (polarimetru testat) după o trecere

- H20 (68-73% d)

- Metanol (71-76% d)

- Procedeul Rusznak, toluen ca înlocuitor al benzenului (tot racemic eșuat)

- Pope - Peachey : h20/acid clorhidric
(65-80 % d este dependent de timp)

Prefer metoda cu h20 datorită costului, timpului și simplității.

Sper că v-am putut ajuta.

 

[lalalander]

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]

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.

 

[lalalander]

Thanks, William.