Síntese de alfa-PVP (escala de 1-10kg). Tutorial completo em vídeo.

Ukspice

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@William Dampier

Preciso de ajuda com as medições

Em vez de usar :Valerofenona
Vou comprar o líquido: 2-Bromovalerofenona

Se eu quiser usar 1 litro

2-Bromovalerofenona


Qual é a quantidade de reagentes que vou precisar por litro?


-Ácido hidrobromico (HBr) 48%;?

-Peróxido de hidrogénio (H2O2) 35%;?

-Pirrolidina (CAS 123-75-1);????

-Acetato de etilo;???

-Carbonato de sódio (Na2CO3) 20% solução aq;???

-Éter dietílico (Et2O) ????

-EtOH 50 ???

-Ácido dibenzoil-D-tartárico ???

-Diclorometano (CH2Cl2) 830 mL;

-Hexano ????

Ácido clorídrico conc. 35% (HCl);...

AJUDARIA IMENSO SE ME CONSEGUISSEM ARRANJAR MEDIDAS PARA A UTILIZAÇÃO DE 1 LITRO DE 2-BROM. PLEASE?????

Para que eu possa calcular o custo por reação, também é a estimativa de rendimento cerca de 20% de perda
1 litro = 800g de a-pvp?
 

SpaceRocket

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hello, I have a question, I have all the steps. followed the process and have a nice a-pvp with a result of 80%. I do it on a larger scale between 1 and 0.5 kg bromo, but now I wonder how I can get large, beautiful crystals because if I try to recrystallize in water it grows. back like little needles. You can see on the picturen powder what i have made and the cristals sombody els but he dont want to tel me how he did it if sombody can help me wild be great!!!
 

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G.Patton

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Hi, how do u recrystallize it?
 

SpaceRocket

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I am loking for method how to cristalize , when i want to cristalize i get nedel cristal like this on the photo
 

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RegulierTier

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Can I replace the ethylacetate with toluene or TBME?
I don't have a rotovap so destill under vacuum would be a problem...
 

SpaceRocket

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I did it with 2 infrared lamps and had to evaporate 16.9 ethiel acetate in plastic containers, which took me 30 hours and i dry my powder also with the lamps that go very fast in view hours your powder is dry
 

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