Ep Minerals, LLC

Michael Joseph Nannini

Peter Edward Lenz

Chongjun Jiang

Wilson Kamau Wanene

James S Shui

A diatomaceous earth product with low crystalline silica content after at least one calcination step of between about 927&#xb0; C. (1700&#xb0; F.) and about 1149&#xb0; C. (2100&#xb0; F.) is disclosed. The product comprises natural diatomaceous earth and at least one binding agent comprising potassium silicate. Further the product comprises no more than about 4.0 wt % of crystalline silica and has a permeability in the range of about 0.3 darcy to greater than about 20 darcy. A process for making such diatomaceous earth product with a low crystalline silica content is disclosed. Moreover, a diatomaceous earth filter aid comprising such a diatomaceous earth product is disclosed.

Diatomaceous earth filter aid containing a low crystalline silica content

A method of producing a range of diatomaceous earth filter aids having selectable permeabilities and less than about 1 percent by weight total crystalline silica. The method includes milling diatomaceous earth ore to a size range of between about 100 micrometers and about 1400 micrometers; calcining the milled diatomaceous earth in a calciner; and milling the calcined diatomaceous earth in an adjustable milling and classification system to produce diatomaceous earth filter aids. Systems to implement such methods and compositions produced by such methods are also described.

Growing community of inventors

Sparks, NV, United States of America

Michael Joseph Nannini