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1. (WO2017069808) OPALINE FLUX-CALCINED DIATOMITE PRODUCTS

Pub. No.:    WO/2017/069808    International Application No.:    PCT/US2016/037816
Publication Date: Fri Apr 28 01:59:59 CEST 2017 International Filing Date: Fri Jun 17 01:59:59 CEST 2016
IPC: B01J 6/00
B01J 20/14
C04B 14/08
G01N 23/20
Applicants: EP MINERALS, LLC
Inventors: LENZ, Peter, E.
PALM, Scott, K.
NYAMEKYE, George, A.
HUMPHREYS, Bradley, S.
WANG, Qun
Title: OPALINE FLUX-CALCINED DIATOMITE PRODUCTS
Abstract:
A diatomite product and method of using such is disclosed. The diatomite product may comprise sodium flux-calcined diatomite, wherein the diatomite product has a crystalline silica content of less than about 1 wt%, and the diatomite product has a permeability between 0.8 darcy and about 30 darcy. In some embodiments, the diatomite product may be in particulate or powdered form. This disclosure also concerns flux-calcined silica products containing low or non-detectable levels of crystalline silica. Some of these products can be further characterized by high permeabilities and a measurable content of opal-C, a hydrated form of silicon dioxide.