Since silica gel adsorbs steams and other organic substances from the media, its adsorption capahility declines. After being reclaimed, it can be used again.

::The reclaim of silica gel after steam adsorption

After acsorbing moistures, the moistures contained in silica gel can be removed by heating deadsorption. There are many methods for heating, for example, by electrically heated stove,remaining heat in the flue and hot air drying etc.

For heating deadsorption, The temperature should be controlled to he within the range of 120-180℃. For blue gel indicator, chromotropic silica gel and blue silica gel DL. the temperature should be controlled to be within 100-120℃.

When reclaiming industrial silica gels, make sure the highest temperatures are within the following limits:

Macro-pored Silica gel no more than 600℃
Fine-pored silica gel no more than 200℃
Blue gel indicator (or-chromotropic silica gel) 　　no more than 120℃
silica alumina gel no more than 350℃

The reclaimed silica gel can be put into use again as long as its moisture comtent is controlled to be less than 2%.

::The reclamation after organic impurities adsorption

1. Roaslirrg
Put macro-pored silica gel into a roaster and gradually rise its temperature to 500-6℃.After about 6-8 hours,the gel grains become white or yellowish-brown. For fine-pored silica gel,the roasting temperature shall be not more than 200℃.

2. Bleaching
Put silica gel into saturated steam to adsorb until it is fully saturated, then drop it into hot water to soak and bleach.Detergent can also be used to remove the waste oil and orher organic impurities. After washing it in clean water, dry it to remove the moistures.

3. Solvent Rinsing
Depending on the organic substances adsorbed by silica gel, select the appropriate solvent to dissolve the organic substances adsorbed inside silica gel, then heat up silica gel to get rid of the solvent .

::Points for Attention in Silica Gel Reclamation

1. Gradually rise up the temperature in drying reclaim to prevent the gel grains from exploding and thereby from reducing the recovery ratio as a result of severe drying.

2. In roasting reclaim, excessively high temperature may cause changes to the pore structure of silica gel, thereby substantially reducing its adsorption effect and affecting its usefulness.
For blue gel indicator or discoloring silica gel the temperature for deadsorption reclaim shall be not more than 120℃, otherwise, its developing agent will be gradually oxidized and therefore lose its developing effect.
3. The reclaimed silica gel shall usually be sifted out to get rid of the find grains, thus making the grains well-distributed and uniform.

Storage and Pricking

Silica gel is strong in moisture absorption, theret'orc, it should be stormed in dry places. Shtlf' cache should be puthetwoen the container and the floor. The containers are steel drums, pulper hags, cardboard boxes, plastic bottles, polyethylene plastic compound bags arid flexible container h.rg.s, etc. I'lc~rsc refer to the categorized product descriptions tk~r detailed packing specil'i c Portions.
The products should be kept From rains moistures sunlight.