before swim ventures off to make meth, swim thought he would have a few practice goes at some basic a/b extractions and getting the feel of it before attempting another to cross the road.
swim has gone with this procedure......
Acid-base Extraction (method 1)
THINGS YOU NEED
1-bottle tussin or any DXM containing compound. (you can use as many bottles as your sepratory funnel will hold).
1. 500 Ml Separatory funnel.
2. pH paper.
3. Pure Sodium hydroxide
4. Distilled water.
5. Hcl (hydrochloric acid / muratic acid)
6. Toluene
STEP #
1. Pour your bottle of tussin into your separatory funnel.
2. Add as much distilled water as you did tussin.
3. base the tussin / water solution (using a solution made from your sodium hydroxide) to a pH of about 9.
4. Add about 50Ml toluene to this based solution of water and tussin.
5. shake well for about 3 or 4 min.
6. Let layers separate.
7. Drain off the bottom layer (keeping it for more extraction with toluene)
8. Place your top toluene / DXM freebase layer in a glass container for later.
9. Pour your basic tussin /water layer back into your separatory funnel..
10. now do steps 4 to 9 two more times. combining your toluene layers each time.
NOTE; You are now done with the basic water / tussin layer, but you should keep it incase something didn’t go well.
NOTE 2; You now have 150 Ml toluene with your DXM freebase suspended in it. You can evaporate the toluene now, to have your DXM in freebase form, but I don’t recommend you do so. DXM freebase is an oil and is very hard to work with for storage.
So the next step is to;
WASH THE DXM FREEBASE
NOTE; You need at this point to wash the toluene / DXM freebase to remove any impurities that came over into the toluene layer during extraction. Trust me this step is needed if you dont want a yellow to brown product when all is done! This will save you from doing a procedure called recrystillazation.
STEP #
1.Pour your toluene / DXM freebase back into your separatory funnel.
2. Pour 100 Ml distilled water into the separatory funnel with your toluene / DXM.
3. Shake this mixing the toluene / DXM layer completely with the distilled water.
4. Drain off the bottom distilled water layer and dump it down the drain.
5. Do steps 2 to 4 one more time.
NOTE; Now you are ready to;
CONVERT THE DXM FREEBASE INTO IT’S HCl SALTS
STEP #
1. Pour 100 Ml distilled water into a glass container, add enough hydrochloric acid to this distilled water to make it’s pH about 4 or 5 (a pH of 5 is perfect!)
NOTE; You still have your toluene / DXM in your separatory funnel.
2. Add 50 Ml of your acidic water solution to the separatory funnel.
3. Shake well for about 4 min.
4. Let the layers separate.
NOTE; Your DXM has been converted to DXM HCl and has moved from the toluene layer into the bottom water / acid layer.
5. Drain off the bottom acid /water / DXM layer and keep it for evaporation.
NOTE; to be sure you got all your DXM from the toluene layer do the following step.
6. Do steps 2 to 5 one more time (which will use up all your acidic water solution.)
7. Now combine your water / acid / DXM layers in a glass backing dish and let this evaporate till all is left in your evaporating dish is a white crystalline substance.
TIP; Place your evaporating dish as close to a stove vent fan as you can get it (BE SURE THE VENT FAN IS VENTED TO THE OUTSIDE!!!!!!) It will evaporate your DXM / acid solution overnight.
NOTE; You now have pure DXM Hcl use a razor blade to scrape up the powder and you are done.. Be sure that the powder is completely dry before you scrape it up with your blade, if you don’t then the acid will react with the metal in your razor blade leaving a yellowish impurity in your DXM.HCl
TIP; You can now wash your toluene layer with distilled water a couple of times and it will be good for the next time you want to extract DXM! Check out my chem. website for information and glassware.
straight from
http://www.third-plateau.com/tips/extract.html
any help or comments needed!
