Metamfetamiin pärast eraldumist, ümberkristalliseerumise probleem

@wangxiaolin777

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Ma lahustan pulbri diklorometaanis, miks diklorometaan ei ole valmis lenduv on kristall, lenduv on valmis, kuiv on pulber
 

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hacke8

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1. Diklorometaanil on metüülhüdrokloriidi suhtes madal lahustuvus ja seda ei saa täielikult lahustada.
2. Diklorometaani keemistemperatuur on suhteliselt madal ja aurustumine on liiga kiire, et moodustada suuri kristalle, ning see ilmneb ainult kristallilise pulbrina.
3. Puhastage hüdrokloriid enne ümberkristalliseerimist (atsetoon, eeter, kuiv ja külm).
4. Ümberkristalliseerimiseks on soovitatav kasutada - atsetoon: vesi, atsetoon: etanool, atsetoon: metanool, etanool: vesi, metanool: vesi.
Vesi võib aeglustada aurustumist, atsetoon võib vähendada lahustuvust ja alkohol võib moodustada paremaid kristalle.
 

@wangxiaolin777

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Õpetaja, minu hüdrokloriid on puhas. Ma ekstraheerisin selle petrooleetriga ja hingasin selle vesinikkloriidigaasi, seejärel kuivatasin selle. Kas puhas etanool on korras? Või oskate te öelda, kuidas seda teha
 
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G.Patton

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Selle veebisaidi põhilehel on videoõpetuse ikoon koos üksikasjaliku kirjapanekuga.
X8VgOnX3Uq
 

G.Patton

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See on teie otsustada. Kui teil on vaja kristallilist vormi met.
 

Acab1312

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Kui teil on d-isomeer (eraldamise teel viinhappega või sünteesi teel efedriiniga).

Ma võin väga soovitada meetodit, mida ma lugesin koos liikmega.

40 g D-meth
100 ml atsetooni
9,5 ml h20
-Segu kõik kuumutada 55°-ni
-Lase jahtuda toatemperatuuril 3h
- 2h külmkapis
- 2h sügavkülmas

Väga lihtne, väga kiire, tänu liikmele, kes seda jagas. Kahjuks ei mäleta nime.
 

Bmth

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Bagus No aitäh teile väga palju 🙏
 

A1N4O8N8

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yep this one is money! got it in the fridge now, best crystals ive seen yet, actually starts making shards not needles, hitting the freezer soon. Isopropyl works okay but I think this is better. I also tried denatured alc, that shit sucks dont waste your time.
 

Chemdog010297

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Does it work the same for racemic product ? D/l from propene chemicals ?
 

G.Patton

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Sest te ei teinud seda õigesti. Te lihtsalt lisasite lahustit ja siis aurustasite seda. See ei ole ümberkristallisatsiooniprotseduur, mida nimetatakse puhastusmeetodiks.
 

G-Meth ICE

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Asking experts
Can pure free methamphetamine be acidified to methamphetamine hydrochloride by bubbling HCI without any other solvent? If 99% ethanol is added in the normal proportion, will it take a long time to acidify 20ml of free methamphetamine to hydrochloride? I tried bubbling HCI gas for two hours and it still didn't turn into acid.
 
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G.Patton

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I'm not sure that it's good Idea. You meth can be oxidized by this way, I think.
I don't understand this part of question.
 

G-Meth ICE

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I mean, can introducing HCI gas into pure free methamphetamine (without any solvents and water) produce methamphetamine hydrochloride? I want to know the principle behind this. Thank you for your reply.
 
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