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Fumerate Water cleanup: Sticky, gooey...

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obliguhl

obliguhl

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The acetone wash yielded a very nice, nearly white powder. The water cleanup an orange, gooey, sticky unscrappable mess.

Running Acetone over the plate doesn't make it anymore scrappable. But it is possible to wash since I was able to test it with a lumpo I somehow could remove from the plate.

What would be the best idea to proceed?

Redissolve in a tiny bit of water to make a big lump and then proceed to wash?

Just a warning: The water evap cleanup does not work. At least not if your limo got organic impuritys.
 
SWIM ran into the same problems using the water method. I have heard good results from using boiling IPA to dissolve the fumarates, then letting it cool and reach room temperature. Maybe some others can provide more info on this method?
 
If the fumarate water is a thin layer, it's easier to scrape up after evaporation. The color change thing is pretty weird, but it always happens to me. I start with white or white with a little yellow, and it turns reddish brown during the water recrystalization. I use distilled water, so it's probably not something introduced by the water. Maybe one of our gifted chemists can explain?

The first time I tried this, I thought I had screwed up somehow because I had a gooey mess. I was advised to scrape it around and it would crystalize, which is exactly what happened, Yay!

Now I use a food dehydrator and I still need to stir it around when it's almost dry as it forms a skin over any thicker areas that don't let the stuff underneath dry well. I now have enough fumarate in the freezer to last a lifetime, but I love the extracting so much, I just keep going! Just started a new BLAB yesterday.

Pokey the Extraction Addict:d
 
How was the water evapped?

I get the most beautiful crystals it I heat slightly until 50% volume, then leave the rest to air dry. Works a treat everytime.
 
I took the precipitated material from my BLAB, which appeared to be a considerable ammount, and mixed it into 200ml of distilled H2O. Maybe too much water? anyway the water is slowly evaping and the color change is happening. Its looking good.
 
Well, the thin layer was actually harder to scrape! I dissolved in 150ml of water and let it evap over the course of a week or so. I could now scrape the majority of it ..the rest is dissolved in some water now.

The Acetone cleanup is much more effective and will be used in the future as standard procedure. Would IPA also work to clean it?
 
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