Synthèse de l'alpha-PVP (échelle de 1 à 10 kg). Tutoriel vidéo complet.

Ukspice

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William Dampier

Besoin d'aide pour les mesures

Au lieu d'utiliser :Valerophenone
J'achèterai le liquide : 2-Bromovalerophenone

Si je veux utiliser 1litre

2-Bromovalerophenone


Quelle est la quantité de réactifs dont j'aurai besoin par litre ?


-Acide hydrobromique (HBr) 48%; ?

-Peroxyde d'hydrogène (H2O2) 35%; ?

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

-Acétate d'éthyle ; ???

-Carbonate de sodium (Na2CO3) en solution aqueuse à 20%; ???

-Éther diéthylique (Et2O) ? ???

-EtOH 50 ? ??

-Acide dibenzoyl-D-tartrique ? ??

-Dichlorométhane (CH2Cl2) 830 mL ;

-Hexane ? ???

Acide chlorhydrique conc. 35% (HCl) ;.? ?

JE VOUS SERAIS TRÈS RECONNAISSANT DE ME FOURNIR LES MESURES POUR L'UTILISATION D'UN LITRE DE 2-BROM. PLEASE ?????

Pour que je puisse calculer le coût par réaction, le rendement est-il estimé à environ 20 % de perte ?
1 litre = 800g d'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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