posted 05-27-98 02:31 PM         

O. checked it himself. It can be done, of course.
Oxidising agents like H2O2 in dil. HCl, Cl2, nitrite/H+, oxygen with NOx catalysis, K2Cr2O7, KMnO4, MnO2, bleach or PbO2(all in acidic soln) can be used.
The iodine is separated from the reaction mixture by (steam) distillation. Solubility of I2 in H2O is low (0.8g/l), all the crystals can be filtered away. Dry them in a desiccator over conc. H2SO4 or CaCl2 and purify by sublimation. Heat with sand bath. To avoid other halogenides as contaminants, especially when using Cl2 or bleach as oxidiser, grind the raw iodine with powdered KI before subliming.

posted 10-15-98 10:08 AM         

Do you have a work-up method for this now?

posted 10-20-98 01:10 PM         

The extracting works pretty well for Br2 -- just use toluene. The toluene bromine solution is fractionally distilled (with an aspirator), and pure bromine is aquired. The advatntage is that by extracting with a solvent, you can get the volume of for your starting material for your distillation down, but the purity of the final product up. Nothing to it, though I'm definately interested if you have a better method. I look forward to labnotes.

posted 07-21-99 12:54 AM         

Then get a couple of coffee filters and filter the liquid along with the iodine crystals. Then pour a little cold DH2O to stablize contents and taks your filters and squeeze out all water and then put your iodine crystal in a jar and you'll pure iodine crystals. It's really that easy. Other methods are also similar and others are just hard and complicated and a bullcarp waste of time. Try it and you'll see just how easy it really is.

posted 07-21-99 02:17 PM         

At the end, you said filter the liquid in a
coffe filter, squeeze out the water from the
filters and you have pure iodine crystals.
my question is: are you saying the iodine
crystals will get stuck in the filter? as in
the liquids will go through the filter but
the iodine wont, and so all in your filter is
pure iodine crystals?

posted 07-24-99 04:48 PM         

Last time I checked elemental halogens reacted with unsaturated carbon bonds with or without light present.

posted 07-28-99 09:52 AM         

Dreamer misread h2o2 (hydrogen peroxide right) as dh2o(distilled water, right).

1 pint 7% tincture iodine(from feed store)

added to this 3 pints dh20

+ 1/2 cup of muriatic acid(hardwarestore stuff cement cleaner)

then said oops that should have been h2o2 insted of dh20.......

so then added 1 pint h202 nothing happening yet. so went to the hive and saw something about bleach and muriatic extraction of Iodine tincture.

so said what the hell and added bleach about 1/2 cup and whalla solution became clear brown color with lotso darke colored cystals floating around in there.

filtered crytals through a few coffee filters in funnels pressed out extra liquid and air dried an hour or so. Looks like killer Iodine grey purplish crystle flakes/granules.
dreamed it in Hi/rp reduction at 1 part to 1 part Pephedrine with 1/2 part rp good product 50-60% return.

posted 11-21-1999 01:54 AM         

So here goes. I came across this method awhile ago, and dreamt that it worked very well.

This was originally posted by cantstanditanymore, and has been rewritten by me because I have misplaced the original document. Oops!

DA

Iodine Extraction
-----------------
Originally posted by cantstanditanymore

Ingredients:
1 pint tincture of iodine (7%)
3 pints hydrogen peroxide (3%)
1/2 cup distilled water
1/2 cup muriatic acid

Other things needed:
1 gallon jug
1 set rubber gloves - nothing says cook like iodine stained fingers!
coffee filters
more distilled water for rinsing of product

Put tincture, peroxide, acid, and distilled water in your clean gallon jug. (Note, as with all chem equipment, only clean it with distilled water.) Cap the jug and shake well. Set aside for 20 minutes or so. Go watch an episode of South Park while you wait. Pour off excess liquid. Take 2 coffee filters, placing one inside the other, and filter remaining product through the coffee filters. When filtration is complete, roll up product in filter and squeeze firmly to remove moisture. Transfer to clean set of coffee filters and rinse crystals with distilled water. Do this 4 times to clean your product. Once again, squeeze firmly to remove as much moisture as possible. Place product on clean, dry filters or in pyrex dish, and set in a dark place to dry. As soon as is dry, transfer product to dark, airtight container. Approximate yield, 16 grams.