Ppg Industries, Inc.

Ppg Industries Ohio, Inc.

James T Dew

Thomas G Krivak

Walter H Waddell

Larry R Evans

Stanley A Heimburger

Harold E Swift

Shantilal Mohnot

Diana L Scott

A silica-based particulate material that may contain less than 5 wt. % of a multivalent cation and a method of preparing such a silica-based particulate material. The silica-based particulate material may be characterized as having a median particle size of at least 20 &#x3bc;m, a BET surface area of at least 90 m/g, and a pH of at least 9.5; or as having a median particle size of up to 20 &#x3bc;m and a pH of at least 10. The silica-based particulate material may be used to make hydrophobic silica-based particulates, which may be characterized as having a pH of at least 10.5.

Silica-based particulates

Substantially dry free-flowing particles of amorphous precipitated silica have large sizes and large carrying capacities for organic liquids, and they contain little or no dust.

Amorphous precipitated silica having large liquid carrying capacity

A statistically large population of particles of amorphous precipitated silica is substantially free of particles of amorphous precipitated silica which are retained on a 20 mesh sieve screen, and is characterized by at least 90 percent by weight of said particles of said population being retained on a 200 mesh sieve screen. Such a population may be produced by cracking amorphous precipitated silica particles between the textured rolls of at least one roll pair.

Particulate amorphous precipitated silica

Free flowing, substantially dust-free, dense granular amorphous precipitated silica having a principal particle size of between about 0.14 millimeters and about 0.84 millimeters are described. This material is particularly suitable as an inert carrier for water-soluble and fat soluble nutritional supplements, e.g., vitamins, which are added to feeds for livestock.

Growing community of inventors

Sulphur, LA, United States of America

James T Dew