Abstract: A method for producing a low iron silica sand product suitable for glass production has an SiO2 content of at least 99.8% by weight, an Fe2O3 content of less than 0.008% by weight, an Al2O3 content of less than 0.1% by weight, and a CaO content of less than 0.05% by weight includes preparing a slurry of crude ore, wherein the crude ore has a sand content of about 75% to 80% by weight, a kaolin/mica content of about 15% to 25% by weight, a dark, heavy mineral content of about 1% by weight, and an Fe2O3 content of about 0.5% to 1.0% by weight. Particles having a size of less than about one hundred forty mesh are removed, and contaminant material is removed. The sand is then separated from the slurry, dried, and passed through a rare earth magnetic separator.

Abstract: The present invention relates to a process for preparing a colored lamellar composition that may provide a wide range of colors. The process includes the steps of dispersing a colorant in a hydrocarbon, grinding the dispersed colorant to a particle size of less than about 1 micron (?m), and spraying the colorant onto a lamellar substrate to provide the colored lamellar composition while mixing and heating the lamellar composition to remove the hydrocarbon.

Abstract: The present invention relates to a process for preparing a colored lamellar composition that may provide a wide range of colors.