How to quickly regenerate color-changing silica gel after cleaning
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After cleaning, the colour changing silica gel should be baked at 100~120℃ for 1~2 h to regenerate quickly, remove moisture and residual solvents completely and restore its drying ability.
1. Quick Regeneration - Normal Procedure
Directions
Operation Instructions
Top Takeaways
① Initial drainage
After washing, remove surface moisture on a filter screen and then absorb with paper sheets
Keep water droplets away and shorten drying time.
② Flat drying method
Spread the grains uniformly in a heat resistant container ≤5cm thick.
For preventing overheating locally and for achieving uniform heating.
③ Temperature Control
Place in the oven and turn the oven to 100–120℃.
The cobalt chloride indicator is destroyed by temperatures above 120C.
④ COOKING TIME
Heat constantly for 1–2 hours.
1 hour for small quantities, 2 hours for large batches or for badly moist circumstances
⑤ Cooling & Sealing
After switching off the power, let cool naturally in the oven for 30 to 60 minutes.
Seal and hold for 5 min. to prevent further moisture uptake.
How to tell when the regeneration is complete: Blue silica gel will turn a deep blue again and orange silica gel will turn bright orange again with no pink or dark green regions.
2. Alternatives to Home (Without an Oven)
If you don't have an oven, you can use the following ways, however they are not as efficient:
Hot Air Method: With the help of a hair dryer at medium heat blow air on the surface of the particles for 10-15 minutes while turning them continuously.
Location near a heater/radiator: Place them on a radiator in winter. This takes 3-5 days but the effect is limited.
Sun Exposure + Sealed Desiccant: Leave them out in the sun for 2 days, and then store them in a sealed container with fresh desiccant to absorb moisture.
A home oven is very efficient and recommended as it gives you more control.
3. Recommended Uses Post-Regeneration
Quick Sealing: Immediately after regeneration, seal particles in a bag or desiccant.
Labelling: Mark the container "Cleaned + Regeneration Date" for convenient tracking.
Avoid Recontamination Keep the regenerated silica gel free from cosmetics, lubricants, cleaning agents etc.
Practical Tip: Store the regenerated silica gel in a sealed container with a resealable strip. This is an inexpensive and effective approach to stop the build up of moisture.
