Vacuum Ovens

What is a vacuum oven?

A vacuum oven allows the operator to lower the boiling point of solvents while applying a vacuum to it. This allows the solvent to be removed without damaging the sample inside the oven.

With the use of heating elements, vacuum ovens speed up the off gassing process and will allow the operator to completely remove any residual solvents left in the sample after the initial purge has been done post extraction.

How do vacuum ovens work?

You will need a vacuum oven pump along with your oven.

The goal when using a vacuum oven or purging oven to remove solvents from extracts while retaining as much of everything else as possible. The best way to do this is by using as little heat as necessary to get the extractions to “melt” and release the trapped solvents.

Typically, this happens between 85 and 105 degrees F. Temperature depends on the viscosity of the extract, which can vary based on the extraction process used, the thickness of the slab, etc. After the initial purge, flip slabs every few hours until solvents are gone over the next 24-48 hours.

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