Preparação da solução de base livre de metilamina

[real4]

Pl
Muito obrigado por este conhecimento gratuito, por favor, pode
Esta solução de metilamina pode ser transformada em 60%, e pode funcionar para

Método de hidrogenação. Obrigado pela resposta

 

[G.Patton]

Olá, que solução é que pede e qual é o método de hidrogenação? Pode ser mais exato?

 

[real4]

O cloridrato de metilamina pode ser transformado numa solução aquosa a 60% e esta solução pode funcionar na alquilação redutora através do método de hidrogenação catalítica?

 

[real4]

Refiro-me à utilização de hidrogénio gasoso em vez de folha de alumínio

 

[G.Patton]

Meu, não consigo ler a tua mente. Hidrogenação de quê?
Sim

 

[hopper_GL]

You're a fuckin lifesaver G. Patton!! I have been looking for an in depth procedure for the 40% aqueous solution of methylamine so I can attempt the Mephedrone HCL synthesis. Being in the US, I havent seen mephedrone since I could legally import it. So I have tracked down everything for doing this synth at half scale, (my limiting reagent is the 4-methylpropiophenone), except the 40% solution. With this writeup think I can pull it off. Then I might have to drop the cheddar for a liter of the 4mpp

 

[B APPLE]

Teacher, may I ask if after adding sodium hydroxide to the water and stirring until dissolved, it will no longer be transparent！

 

[CCL4 huffer]

then u didnt disolve it fully

 

[mycelium]

It literally says that you WAIT FOR THE EXOTHERMIC REACTION TO BE DONE which is clear liquid and cooled down

 

[B APPLE]

Teacher! May I ask if there is a diagram for the 40% synthesis method of methylamine water?

 

[B APPLE]

Teacher, may I ask if the second bottle of 600ml water is filled with methylamine gas? If the 600ml of water reaches 1kg, then it is considered complete, right?

 

[G.Patton]

Hello
yes

 

[B APPLE]

If there is no reaction after adding methylamine hydrochloride to the sodium hydroxide solution, do we still need to add 869 grams？

 

[B APPLE]

Do I need to seal when introducing amine gas？

 

[Eddybeaumont]

thank you for this valuable help! That said, I would like you to enlighten me -5. A silicone tubing with vial connector is attached to the reaction vial with methylamine free base. what material should we use to hang this silicone pipe?

 

[NovicechemistEU]

Does this video summarize what is being done?

 

[Chemistry lntern]

Excuse me, teacher! After I introduced methylamine gas, the water became lighter and lighter！

 

[Chemistry lntern]

Teacher, do you mean to heat the flask containing methylamine free base to boiling and let the water flow together to the second flask？

 

[Rabidreject]

Hey, I have a little p2p and was planning on reducing via Al/Hg amalgam.
I am going to make some methylamine HCl and was wondering if I absolutely have to bubble the freebase into water for the amalgam reduction or if I could get away with making a 30% methanol solution (the second method above).

Essentially what is the easiest way of utilising the HCl salt of methylamine in the reductive amination reaction with p2p. Thanks!

 

[CCL4 huffer]

dont think that would intervene mutch but why not just use the methylamine gas directly it saves sum solvent

 

[Arakava]

In this method of synthesis methamphetamine we use 88% ethanol and 40% aqueous methylamine.
So can we make methylamine free base 40% in ethanol and use it?

 

[Arakava]

I tried to dissolve 34g NAOH in 46g ethanol. Are you sure NAOH is soluble in alcohol?
A salt formed and all of it went to the bottom of the beaker. I think NAOH has low solubility in alcohol.
Isn't it better we pour NAOH(S) in a flask and dissolve methylamine hcl in ethanol and add this solution to the NAOH flask and start strring. Reaction produces water. And more water dissolves all NAOH?