Síntese P2P a partir de P2NP

[K-Cyanide]

Não, absolutamente no sentido em que a reação não funcionará utilizando P2P não destilado, não é verdade.
No entanto, o produto final é sempre de maior qualidade quando se utilizam compostos destilados. E não esquecer que o P2P sujo prejudica o rendimento, sem dúvida. É um trabalho fastidioso, mas compensa.

 

[Multivitamin]

Acha que é absolutamente necessário medir a pressão no sistema quando se destila a vácuo óleo p2p/óleo de base livre de metano? Ou posso simplesmente ligar a bomba de vácuo ao adaptador de vácuo no novo balão de receção vazio quando o DCM tiver sido destilado (porque o DCM com baixo ponto de ebulição de 50c destilaria mesmo sem vácuo) ligar a manivela de vácuo até ver os primeiros sinais de óleo p2p a chegar ao balão de receção e manter a temperatura até a destilação terminar.

Estou a perder alguma coisa? Tenho de medir a pressão do vácuo? ou posso simplesmente aumentar lentamente o aquecimento até ver o óleo a chegar ao recipiente recetor?

 

[waltjr5858]

Be careful your pump doesn't suck in your product. If you have leaks anywhere it causes air to flow through the system towards the pump instead of holding vacuum. Causes some product to go bye....

 

[Czeczeczecze]

Não consigo obter h2o2 numa concentração de 30%. Posso usar 12% em maior quantidade? ou o que posso usar em vez de h2o2?

 

[PolandoEmingarnte]

porque na polónia é ilegal 30%

 

[amieri]

You concentrate it by evaporating the water out of it.

 

[mexxx]

This is a normal process, don`t worry. Keep adding H2O2 and potassium carbonate.

 

[GhostChemist]

This is a normal process, don`t worry. Keep adding H2O2 and potassium carbonate.

 

[amieri]

Is there anything I can use instead of potassium carbonate?

 

[Chemist Jun]

Sodium carbonate

 

[Arakava]

In the video says add hcl until ph 4 - 5 even less.
But in here Says ph 7 - 6.5
Which one is right?

 

[GhostChemist]

In general pH should be lower than 7
Acid is needed to destroy residual NaBH4 and for dissolution K2CO3

 

[Jack]

@ghostchemist.8647 @GhostChemist I would appreciate it if a demonstration was done on how you would siphon liquid with the use of a vacuum pump, it is unclear how that technique is done? Can you link to the technology which achieves that effect? Is it a add on to a pump?

 

[GhostChemist]

In this video used siphon too

 

[Jack]

Do you use Hydrogen peroxide and Hydrobromic acid to make bromine in situ because you don't want to deal with Element bromine in a dropping funnel? Can you link to a piece of equipment you use to siphon liquids. A photograph of it? Do you just use a jar?

 

[GhostChemist]

In this synthesis that is show in this topic bromine and its compounds are not used. This topic dedicated p2p synthesis from p2np.

 

[latolatokilat]

Hello @GhostChemist : Can i use potassium borohydride in this reaction ?

 

[GhostChemist]

Hi
I think yes, but calculate the quantities in mol

 

[Jordan Belfort]

What reaction would you suggest to make a onepot (can be barbier-alike) P2NP to P2P which runs at elevated temperature's or room temp.
Iron and aqeous HCL requires refluxing, it's possible at ibc tote but if leak occurs it's finished.

This isn't scaleable to IBC tote. Using other reductant can overreduce (F.E. magnesium in methanol).

 

[GhostChemist]

Scalable and control reactions for produce P2P from P2NP is the process with NaBH4

Other method from using glycidates (without P2NP)

 

[nokospp]

i just perform this synth and failed in h2o2 addition
for anyone trying this method you should try to make it as cold as possible during h2o2 + k2co3 addition if you didnt have patient and poring h2o2 way to fast it will burst out