Dear Atharva Mule, it is not really difficult to find references to answer your request. Are you looking for something special. The attached files are good supports. My Regards

Thank you for your reply Mr Abdelkader BOUAZIZ

I know the procedure of making silica gel, but I could not get a laboratory method for making spherical silica gel hard beads (exactly like the hydrogel beads we get in market) of diameter 400-500 microns.

How to make them exactly spherical of diameter of 500 microns?

Also I want them to be non-porous hard beads.

Dear Atharva Mule, these are interesting documents. My Regards

Thanks a lot, Mr Abdelkader BOUAZIZ.

These are very helpful.

Hi;

Please see this document:

Process for forming spherical silica beads US3258311A.

My best regards

Thanks.

The gel is prepared at about pH of 5.5-6 by adding sodium silicate drop by drop to HCl solution.

The solution drops were dropped into pure toluene liquid where spherical silica gel beads were observed.

But, after some time they combine with each other to form bigger droplets. That means they are not gelled properly.

I want them to be a bit more dry so that they don't combine.

Any suggestions?

Can heating toluene or adding sodium silicate to toluene(as immediate gelling occurs at around pH 6) for complete gelling help?