How to Regenerate Silica Gel

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How to Regenerate Silica Gel

Things to Know Before you Start:
  • Regeneration should ONLY be performed in a well-ventilated area
  • Do NOT regenerate the material at temperatures exceeding 200˚F as this can cause the material to burn and present a fire hazard, high temperatures can also damage the crystalline structure of the material, rendering it useless
  • The best way to determine that the material is regenerated is by notating a color change if indicating silica gel, or by measuring a weight change if non-indicating – a before measurement will be needed; as water is released, the tray of silica gel will lose mass.
  • The chemical properties of the material are similar to that of glass, so beware that it does get very hot and handle with great care using safety gloves and googles
  • Regenerating the material in thin layers will give better results and reduce the chance of burning the material, regenerate in small batches if necessary.
  • The material should never be consumed; a Safety Data Sheet can be found at https://sorbentmedia.com/pages/specs

 

      The Preferred Method:

      1. Preheat a clean grill or oven to 200˚F.
      2. Prepare a metal cookie sheet by covering it with aluminum foil for easy clean up.
      3. Remove the material from the pouch and evenly distribute it across the cookie sheet, leave uncovered, and place on the preheated grill or in the oven.
      4. The time for regeneration varies for each oven, but the process usually takes around 30 minutes, stirring every ten minutes or so to allow condensed moisture to escape and for even regeneration.
      5. Once regenerated, allow material to cool for at least an hour before placing material back into use or sealing for storage.
      6. You can reuse silica gel multiple times as long as proper regeneration steps are followed. Repeat when necessary!

       

      The Alternative Method:

        1. Place the silica gel into a glass container in a thin, even layer.
        2. Place the glass container into a microwave and change the Power Setting of your microwave to 50% Power.
        • NEVER place foil, other metals, or unapproved items in the microwave
        • Review your microwave’s user manual or contact your brand maker for instructions to changing the power settings
        • DO NOT use normal, 100%, high power on the microwave, this can potentially burn the material and/or potentially cause a fire.
        • We STRONGLY recommend using a grill or oven.
        1. Once the Power settings have been changed to half, or 50% power, microwave the material in one-minute intervals, stirring the material in between each minute.
        • BEWARE that the glass AND the material will be hot when removing from the microwave so use extreme caution and heat protection for the hands
        1. Remember to ensure the microwave is set to half power before starting next one-minute microwave interval and repeat as necessary until silica gel is regenerated.
        2. Once regenerated, allow material to cool for at least an hour before placing material back into use or sealing for storage.
        3. You can reuse silica gel multiple times as long as proper regeneration steps are followed. Repeat when necessary!