Kako iz raztopine povidon-joda pridobiti jodove kristale?

Haruwua

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Heyo! Kako iz 11-odstotne raztopine povidon-joda pridobivam jod?
Sledil sem vodniku za ekstrakcijo joda iz alkoholne raztopine z uporabo polietilenske plošče in vode, vendar se mi to ni zares posrečilo.
Imam nekaj natrijevega hidroksida, vendar žal nimam hcl kisline, niti vodikovega peroksida, da bi poskusil. Ali lahko preizkusim še kakšno drugo metodo? Jod želim uporabiti za sintezo rdečega fosfora.
Cenim vsako pomoč!
Lep pozdrav
 

Dr. MMX

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Poskusil bi ga ločiti prek DCM in odcediti spodnjo plast ter videl, kaj se bo zgodilo :)
 

SoldadoDeDrogas

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Obstajala je metoda, pri kateri je Fester zajel ohlapen jod v toluenu ali naftnem napthu. To je počel z natrijevim hipofosfatom ali hipofos- kislino, vendar verjamem, da bo deloval tudi z RP v vodi. Tako ali drugače, raztopino joda v toluenu dodate RP v vodi, idealno je, da imate magnetno mešalo in sčasoma jod v toluenu reagira z RP in ustvari raztopino HI v H2O, ki jo bo treba filtrirati in ločiti od ostalega ali pa najverjetneje in še bolje destilirati. Ko jod reagira/se porabi, lahko ugotovite, da je toluen prešel iz vijolične barve joda nazaj v barvo prozornega topila.

Mislim, da morate jod do neke mere obarjati, preden ga lahko zajamete v raztopino. Zato ne vem, ali bo to delovalo brez HCl ali H2O2. Natrijev hidroksid se uporablja v raztopini povidon-joda, da aktivira in loči ves gak, ki se nabere.
Nimam pojma, kaj bi lahko nadomestilo HCl kislino in vodikov peroksid. V resnici ne razumem, kako to deluje, vem le, kako to narediti.
Veliko sreče! o7
 

Haruwua

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Recently i had the same tought and found a nilered video to it. Will post it in videos soon, will be important i guess bc typical iodine tinctures arent existent abymore at least where i live. It was something with peroxide and smth else which in theory first seperated iodine and povidone with distillation afterwards but i dont remeber. Will live forever in video category :3>
 

SoldadoDeDrogas

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The betadine (povidone-iodine) and regular iodine tinctures use the same process. Only with the povidone you add NaOH solution and reduce the volume, the polymer will precipitate for decantation. Then you use HCl and H2o2 to precipitate the iodine and filter that out. The crude iodine can then be futher washed and purified for use in Nagai method.
 
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