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No. my experience of using alcohols (IPA, ethanol, methanol) as crystalising solution showed that you get small? sand-like crystals. Although rather pure, but they never had grown big in size.

Hi. This was done by dissolving in mixture of water&acetone. The solution must be clear, not cloudy or misty. An then it was left in dark kitchen locker for about a week or so. Hope this could be useful for you or anyone.

Oh, and just another advice on acidifying step. Before you start, divide your freebase solution in two halfs. Or at least leave some ammount. This could be really a savior in case. If you somehow happen to overshoot too much acid, just add this extra freebase and this will fix your mistake...

Brine is saturated NaCl water solution. You can prepare it at fist place by dissolving table salt in water. Maximum concentration of NaCl is 36g/100ml water. Take 1lit. of water, put it on mild heat, and start adding salt. It should take about 400grams to dissolve in hot water. After cooling to...

In general the process is right. One more thing you could do is to wash organic layer with brine at the end. This would remove any leftover water, leaving more clear layer. Ethylacetate does work. Haven't used IPA. My advice is don't dilute your freebase solution. Just add dropwise and...

Proportions looks ok to me. But the total scale you are going to run would be a hardwork))

I've recrystallized from IPA

For those who is interested. I've tried this route. Overall I can confirm it works, except reaction conditions. Temperature and timing were not even close as it's stated in video. Though, in the video they use Iodo-ketone. That's a significant difference. So, the test run I got 50g of bromine...

Was surfing youtube, then suddenly one of chemsynth video got my attention.

I guess this should work with carbamide peroxide (hydroperite) instead of sodium percarbonate. Overall this scheme looks quite messy to me..

Let me share a piece of my practical experience. With the acetic acid route it doesn't have to be glacial concentration. I've tried 70% "acetic essence", (that is available OTC in food stores in my area) and it worked! BTW, the process is much less messy and easy workup compared to the DCM...

Not that I'm boasting, but once there was a time...