Methamphetamine crystallization and Ice manufacturing

[Lordoftheshard]

1 do some home work
UV Fluorescent Black Light BL 12inch (full length) Replace Light Bulb 8Watt T5 UVA
2 20%of the total weight of the the product dh20 recrystallisation eg 1000g MA add 200g of dh20 heat dissolve then place under UV black light
And I tell you straight don't try and belittle me and try and make me look like ,I don't know what I'm talking about ok
I come to this community with ,20years experience and I don't need to copy and paste Fester bullshit for answers ok
I have worked in ,labs all over the world

 

[triptonaut123]

20 years of experience has teached you to put a blacklight on a aqueous meth solution to selectively crystallize d-meth? Publish that shit in the Nature journal buddy, it's ground-breaking. What selectivity - if I ignore all the other nonesense for a minute - would a UV light have on the D-meth molecule vs the L-meth? None, because it is excited exactly the same, it has all the same physical properties.
I don't know why you try to take this people in your fantasy world but it's shameful to be honest.

 

[adrenochrome]

1. 1000g MA its free base or HCl ?
2. dh20-this is distilled water ?

 

[Johnski]

L-tartric will precipitate L-tartrate D-product, Means the l isomer Remains in Solution?

D-tartric will precipitate the D-tartrate L-product, Means The d meth isomer Remains in Solution?

 

[Mr Good Cat]

Tried to acidify and crystallize relatively small quantity of MDMA freebase.

The weight of the freebase after extraction and ether purification is 40 gr. Calculated volume of HCl = 16.41ml.

The intention was to add the acid, then heat it up to 130C, and drop into the acetone 5-10 volumes and leave it in the freezer.

This time I did it very slow for some reasons, but involuntary. So all the acidification took approximately 30 minutes against planned 15. Magnetic stirrer was used intensively. Resulting PH=2.5

Then when approaching planned volume, I relalized all I have in the beaker on the stirrer is pure white powder. I dropped it in some volume of frozen acetone but rather to wash it as it doesnt look there is any more to crystalize.

Probably all the water evaporated due to the heat released when the acid dripped.

Not sure is it good or I made some serious mistake?

 

[kharpa177]

did you do this crystallization with heating? or with negative temperature? Could you explain to me how I crystallize the free base at negative temperature

 

[Mr Good Cat]

of course I didn't heat it intentionally. the heat releases itself as the result of acidation.
in my case the mistake was to do it too slow: try to finish all the estimated volume of HCl in 15 minutes.

 

[G.Patton]

You have to avoid local overheating. The reaction (acidification) time don't play role in this procedure. Temperature and well stirring are main characteristics, which has the most effect on the reaction.

 

[G.Patton]

Hello, dear. I would like to ask you why do you heated the solution? It isn't needed. Also 5-10 volumes is too much. 1-3 is okay.
What is concentration of your acid? 35%? You need about 18 ml in this case.

It is okay

It is not okay. Too low. 5-5.5 is the low point, which is recommended.

 

[Mr Good Cat]

36-37% acid
any way I was mostly watching as the color of freebase changes, and it fits
I didn't heat while dripping the acid. It was used for the stirring only.
2.5 it was the solution, the salt itself shows 5.5.

 

[Nasty19659669]

Hello Patton, bear with me please as this is my first comment, or question rather. I have tried repeatedly to purify mamph by recrystalization, and failed miserably. I just keep wasting product. I am struggling please help with a process! This was my last attempt in attached file.

 

[G.Patton]

Hello, how can I help you?
P.S. Please, use Spoiler system. Your text was horribly large and had no sense for your question.

 

[Nasty19659669]

Spoiler: need advice

I am strugglingwith recrystalization, essentiallywhen trying to purify bad gear. Any suggestions?

 

[G.Patton]

I can't help you without detailed explanation of your procedures.

 

[Nasty19659669]

G. Patton, finally nailed it today! Felt really stupid at how easy it is and how bad I was struggling.

 

[Mr Good Cat]

Does this meth carbonate give a kind of yellowish hue to the whole solution? I noticed how the free base turned slightly yellowish after a night in a beaker.

As I remember, percentage of CO2 in the air is 0,03-0.045%.
Molar mass of CO2 = 44.01 gr
Density of CO2 = 1,9768 kg/m3 = 1.9768 gr/L
1.9768 x 0.03 / 44.01 = 0.001344
1.9768 x 0.045 / 44.01 = 0,002021
Then, moles of CO2 in the 1 litter of air shall be between 0.001344 and 0,002021.
If the container is hermetically sealed, the losses should not be significant, should they?

 

[UWe9o12jkied91d]

amines turn yellow or darker when exposed to air and leave a white residue as they evaporate

 

[G.Patton]

It's worth to avoid long air exposure for sure.

 

[triptonaut123]

Is it crazy to add aqueous HCl to a toluene solution with meth freebase in it, seperate the water layer and evaporate it? Meth salt should be in the water layer?

 

[G.Patton]

Hello, the biggest part will be there, yes.

 

[Sjeik]

I tried the way nr 1 And got it like this, the ph was lowered to 4 And after boiling to 130c i poured it in to cold aceton

 

[jasper]

Can you make a video about ice sir thank you

 

[G.Patton]

Hello, video is already uploaded.

d-Methamphetamine Hydrochloride Synthesis Via Tartaric Acid

• Novator
• Mar 21, 2023
• 174

https://bbgate.com/threads/methamphetamine-isomers-separation-by-tartaric-acid.9690/...

 

[hunter12]

Hi, i have mistakenly added excess hcl acid on my freebase and my oil has changed to dark red, now its not crystallising. Should i add NaOH and water to turn it back to freebase or is there any alternative way i can do

 

[G.Patton]

Hello. Yes, make it back basic and re-extract with DCM. Then, evaporate solvent and repeat procedure without mistakes.

 

[hunter12]

Thank you so much sir

 

[Win Win]

Sir i am facing the same problem.

 

[Win Win]

I am facing the same problem