So I've been doing some fumarate clean up tests. Here are the pictures:
Before (hard yellow chunks from FASI):
After:
So the pictures above show how well it cleans, with very little yield loss (I think from around 4.4g of yellow stuff I ended with 3.7g white/transparent crystals). The process is simple sodium carb paste and FASA. Here's the detailed instructions:
1- have the dry fumarates and mix them with sodium carb. I added excess sodium carb, maybe twice as much as fumarates, overboard but its better too much than too little.
2- Add some warm water to make a paste, and mix well. It can be a bit more water than paste, like runny, but no need to be a solution.
3- Dry the paste. I used a hair drier to make it faster. Remember its freebase, so use heat less than 100 degrees celcius. Once it's getting drier, it forms some chunks, break them up to finish drying.
4- Put the dried paste/powder in a glass and pull 3 times with acetone. I added around twice the volume of the dried paste in acetone for each pull (last pull a bit less).
5- Make a FASA solution (just add excess fumaric acid to acetone, shake shake, filter)
6- Add FASA to the dissolved DMT freebases from the 3 paste pulls. I added around the same volume of FASA than there was of acetone with DMT, but probably less is necessary. Too much is not a problem since excess fumaric acid does not precipitate.
7- Wait a few hours, decant/filter/let your fumarates air dry.
This could potentially also be done with IPA, maybe even with ethanol, instead of acetone, but Im not sure how the other solvents will affect crystallization (might be less pure, or more, or different crystal shapes, or same same...)
Before (hard yellow chunks from FASI):
After:
So the pictures above show how well it cleans, with very little yield loss (I think from around 4.4g of yellow stuff I ended with 3.7g white/transparent crystals). The process is simple sodium carb paste and FASA. Here's the detailed instructions:
1- have the dry fumarates and mix them with sodium carb. I added excess sodium carb, maybe twice as much as fumarates, overboard but its better too much than too little.
2- Add some warm water to make a paste, and mix well. It can be a bit more water than paste, like runny, but no need to be a solution.
3- Dry the paste. I used a hair drier to make it faster. Remember its freebase, so use heat less than 100 degrees celcius. Once it's getting drier, it forms some chunks, break them up to finish drying.
4- Put the dried paste/powder in a glass and pull 3 times with acetone. I added around twice the volume of the dried paste in acetone for each pull (last pull a bit less).
5- Make a FASA solution (just add excess fumaric acid to acetone, shake shake, filter)
6- Add FASA to the dissolved DMT freebases from the 3 paste pulls. I added around the same volume of FASA than there was of acetone with DMT, but probably less is necessary. Too much is not a problem since excess fumaric acid does not precipitate.
7- Wait a few hours, decant/filter/let your fumarates air dry.
This could potentially also be done with IPA, maybe even with ethanol, instead of acetone, but Im not sure how the other solvents will affect crystallization (might be less pure, or more, or different crystal shapes, or same same...)
