A method for manufacturing granulated silica. The method includes granulating silica powders each having a primary particle size of 5 to 50 nm by use of water, and hydrophobizing each surface of the silica powders with a silicon atom-containing hydrophobizing agent before or simultaneously with the granulation step.

Agglomerated silica is obtained by mixing silica with a rosin resin to be agglomerated.

Disclosed in certain embodiments is a method of preparing structural colorants comprising photonic particles, the method comprising varying the calcination temperature in the process to enable the tuning of pore size to obtain a wide variety of possible colors.

The present invention relates to granular functionalized silicas, wherein the Hg pore volume (<4 μm) is more than 0.80 ml/g, d.sub.Q3=10% is more than 400 μm, d.sub.Q3=90% is less than 3000 μm, the ratio of d.sub.50 without ultrasound exposure to d.sub.50 after 3 min of ultrasound exposure is <4.00 and the carbon content is 1.0-15.0% by weight. The inventive granular functionalized silicas can be used as a support material, especially as a support for enzymes.

Granular and/or shaped hydrophobic silica useful for thermal insulation materials are prepared by mixing hydrophilic silica with a hydrophobicizing agent at low temperature so the hydrophobicizing agent does not appreciably react, followed by deaeration and compaction.

A method for manufacturing granulated silica. The method includes granulating silica powders each having a primary particle size of 5 to 50 nm by use of water, and hydrophobizing each surface of the silica powders with a silicon atom-containing hydrophobizing agent before or simultaneously with the granulation step.

Granular and/or shaped hydrophobic silica useful for thermal insulation materials are prepared by mixing hydrophilic silica with a hydrophobicizing agent at low temperature so the hydrophobicizing agent does not appreciably react, followed by deaeration and compaction.

The present invention provides granulated silica including water-granulated silica powders, each of the silica powders having a primary particle size of 5 to 50 nm and a surface hydrophobized with a silicon atom-containing hydrophobizing agent; the granulated silica having a degree of hydrophobization of 40 or more and a loose bulk density of 150 g/L or more. This provides granulated silica that is excellent in handleability and has good dispersibility.

Including droplet and powder which has a liquid repellent property with respect to the droplet and is attached to the surface of the droplet.