Filter over a silica slurry bed in a filter funnel
Cool solution to 0c
Repeat step 4
Take a representative sample of the solution and add dry ice until the solution stops bubbling
Repeat step 4 with sample
If more solids are filtered out in step 8, repeat steps 7 and 8 with entire solution.
If no solids were present in step 8, or after step 9, proceed to next process
Now you have two choices.
If pursuing a single pass end result, or do not wish to process your distillate between first and second passes, adsorbent scrubbing the crude while still in the ethanol solution is appropriate.
If the situation allows it, adsorbent scrubbing post first pass distillation, in an alkane solution is more effective.
Pre-First Pass Adsorbent Scrubbing:
In a well ventilated area or fume hood, heat alcohol/oleoresin suspension to 80c (Just above the boiling point of ethanol and isopropanol).
Measure 5% of total material volume in CBleach and slowly add to boiling suspension. (1000g oleoresin : 50g CBleach)
Stir for 10-15 minutes while maintaining a minimum of 60C temperature.
Allow solution to cool to approximately 40c and filter through silica over filter funnel
Repeat steps 1-4, 2 to 3 times depending on color remediation necessary.
(Note, coarse grade carbon can replace CBleach for the first scrub if multiple scrubs are performed)
Degumming would be appropriate before first pass as well, but I will post an article on that later.
I heard of people mixing in carbon powder during winterization and since fine carbon dust can move threw filters…ive heard people adding celite to bond to the carbon dust making it easier to filter… Ive never done this as celite was hard to find…BUT then i started hearing people using DE from the the hardware store or pool supply store in place of celite.
Im curious as to this as well as there is a pool supply store on every corner here. Loving learning new shit. I honestly think i learned more in the last month than the last 3 years combined.
We also sell a more cost effective activated bentonite which is rated for fast filtering (70-90seconds). This is the T5 product. Celite may be a bit cheaper but we are hoping to get qualitative results showing that it provides scrubbing while providing a filtration matrix.
Pool grade Celite from your pool supply does the job. Its made for filtration. Of course better stuff is out there and pool grade is not food grade, but its cheap. Iron in Celite is a potential issue. Try googling Perlite as well.
