SDS Sheets: Available upon request on all chemicals used in this process.



  • Splash Goggles
  • Lab Coat
  • Gloves

Required Materials/Media:

  • Silica Gel 60
  • Activated Alumina
  • Ethanol (Denatured, 200 Proof, 190 Proof)


  1. Fully dissolve crude in a solvent with a 10:1 ratio (1L Crude for every 10L Ethanol)
    1. Allow mixture to cool to room temperature if heated.
  2. Filter over a bed of Alumina on top of Silica Gel in a filter funnel.
  3. Cool solution to 0˚C.
  4. Repeat Step 2
  5. Take a representative sample of the solution and add dry ice until the solution stops bubbling.
  6. Repeat Step 4 with sample
  7. If more solids are filtered out in Step 7, repeat steps 6 and 7 with entire solution.
  8. If NO solids were present in Step 7, or after Step 8, proceed to next process.
  9. For additional process guidance please ask about Consultant Recommendations.

For Ambient and Crude (room) temperature extraction:

  • 1st Cold Crash= (1-5hrs until solids form)
  • 2nd Cold Crash= (8-24hrs or until solids form)
  • 3rd if necessary

Temperature Range: 0˚C – 40˚C (colder temp. can be faster)

Post-Cold Crash


  • Activated Hardwood Carbon
  • T-5™
  • T-41™
  • Activated Alumina
  • Silica Gel 60
  1. Place adsorbent in an appropriate vacuum filtration system and pass solution through the adsorbent and filter material.
    *Bed Depth of 1-2” above the filter material*
  2. After collecting solution from the final filtration, use Falling Film or Rotary Evaporator to remove solvent.