Unimin Corporation

Covia Holdings Corporation

Jerry William Janik

Scott Van Remortel

Frank Cangelosi

Specifically identified products are produced using powder formed from particles of a naturally occurring organic oxide mineral with substantially no free silica, preferably nepheline syenite, where the powder is essentially dry with a moisture content of less than 0.8% and has a controlled maximum particle size with 99.9% of the particles of the powder having a particle size of less than 10 microns defined as 'fine grain ultra-fine' powder, which fine grain ultra-fine powder is preferably less than 6 microns, and where the fine grain ultra-fine powder comprises 3-25% by weight of the identified product.

Ultra fine nepheline syenite powder and products for using same

A useable particulate nepheline syenite having a grain size to provide an Einlehner Abrasive Value of less than about 100 is described. The particulate nepheline syenite is generally free from agglomeration and moisture free. At least 99% of the nepheline syenite particles have a size less than 10 microns.

Ultrafine nepheline syenite

A useable particulate nepheline syenite having a grain size to provide an Einlehner Abrasive Value of less than about 100 is described. The particulate nepheline syenite is generally free from agglomeration and moisture free. At least 99% of the nepheline syenite particles have a size less than 10 microns. In practice, the nepheline syenite grain size is less than about 5 microns and the distribution profile of the particulate system is generally 4-5 microns.

Nepheline syenite powder with a controlled particle size where 99.9% of the particles are less than 6 microns, which powder has a moisture content of less than 0.8% and an Einlehner Abrasive Value of less than 100 and products using this fine grain ultra fine nepheline syenite powder.

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Bridgenorth, Canada

Jerry William Janik