chapter  60
10 Pages

Preparation and Uses of Silica Gels and Precipitated Silicas

Nomenclature and Manufacture . . . . . . . . . . . . . . . . 779

Silica Gels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 780

Precipitated Silicas . . . . . . . . . . . . . . . . . . . . . . . . 782

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 782

Reinforcing Agent . . . . . . . . . . . . . . . . . . . . . . . . 782

Carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 783

Anticaking and Free-Flow Agent . . . . . . . . . . . . 783

Thickener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 783

Adsorbent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 784

Defoamer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 784

Catalyst Support . . . . . . . . . . . . . . . . . . . . . . . . . . 785

Abrasive-Polishing Agent . . . . . . . . . . . . . . . . . . 785

Antiblock Agent . . . . . . . . . . . . . . . . . . . . . . . . . . 785

Flatting Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . 785

Battery Separators . . . . . . . . . . . . . . . . . . . . . . . . 785

Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 785

Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 786

Other Uses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 786

Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . 786

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 786

Additional Reading . . . . . . . . . . . . . . . . . . . . . . . . . 786

An overview of the nomenclature, manufacture, and uses of synthetic silica gels and precipitated silicas that

are of significant commercial importance is presented. Typical manufacturing processes are reviewed, and

differences in the structure of silica gels and precipitated silicas that come about as a result of their methods

of production are discussed. Applications covered include uses as a reinforcing agent, carrier, anticaking

and free-flow agent, thickener, adsorbent, defoamer, catalyst support, abrasive-polishing agent, antiblock

agent, and flatting agent.