Abstract: This disclosure relates to ultra-high performance diatomite products possessing very high silica specific volume, a characteristic which provides for high filtration performance, in terms of low unit consumption and long filtration cycle times. These novel products of this disclosure also show very low extractable metals for both the non-acid washed and the high purity (acid washed) grades. These characteristics are of particular value in the separation of solids from high purity liquids in electronic chemical, specialty beverage and life science applications. In addition to outstanding physical and chemical characteristics, these products also contain no detectable levels of cristobalite and have a wide range of permeabilities, and are produced from mineralogically impure ores containing high levels of alumina and iron oxide.

Abstract: This disclosure concerns flux-calcined products manufactured from filtration waste streams, and methods for manufacturing the same. In particular, it concerns functional additives produced from spent cake comprising diatomite filtration media which are suitable for use in paints, plastic films and elastomers for control of optical and surface properties, and processes which are suitable for manufacture of such products. It further concerns the recovery of energy from spent cakes during the regeneration process.

Abstract: This invention concerns ultra-high purity, ultra-high performance biogenic silica filtration products comprising diatomaceous earth. In particular, it relates to products comprising diatomaceous earth which is derived from ores that have been specifically selected for their naturally low centrifuged wet density and which have been intensively beneficiated to reduce extractable impurities to near or below detection limits. The low centrifuged wet density of the selected natural ore is either maintained or further reduced through the beneficiation process, which provides for filtration product/media with high particulate holding capacities able to provide for extended filtration cycle times.

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.

Abstract: A method of determining opal-C and cristobalite contents of a product that comprises diatomite is disclosed. The method may comprise performing thermal processing to determine a loss on ignition for a representative first portion of a sample of the product; identifying and quantifying primary and secondary peaks present in a first diffraction pattern that results from bulk powder X-ray Diffraction on a representative second portion of the sample; and using a known standard sample of cristobalite to determine whether the primary and secondary peaks present in the first diffraction pattern indicate the presence of opal-C or cristobalite in the product.

Abstract: This disclosure concerns flux-calcined products manufactured from filtration waste streams, and methods for manufacturing the same. In particular, it concerns functional additives produced from spent cake comprising diatomite filtration media which are suitable for use in paints, plastic films and elastomers for control of optical and surface properties, and processes which are suitable for manufacture of such products. It further concerns the recovery of energy from spent cakes during the regeneration process.

Abstract: This disclosure relates to ultra-high performance diatomite products possessing very high silica specific volume, a characteristic which provides for high filtration performance, in terms of low unit consumption and long filtration cycle times. These novel products of this disclosure also show very low extractable metals for both the non-acid washed and the high purity (acid washed) grades. These characteristics are of particular value in the separation of solids from high purity liquids in electronic chemical, specialty beverage and life science applications.

Abstract: This invention concerns ultra-high purity, ultra-high performance biogenic silica filtration products comprising diatomaceous earth. In particular, it relates to products comprising diatomaceous earth which is derived from ores that have been specifically selected for their naturally low centrifuged wet density and which have been intensively beneficiated to reduce extractable impurities to near or below detection limits. The low centrifuged wet density of the selected natural ore is either maintained or further reduced through the beneficiation process, which provides for filtration product/media with high particulate holding capacities able to provide for extended filtration cycle times.

Abstract: A method of determining opal-C and cristobalite contents of a product that comprises diatomite is disclosed. The method may comprise performing thermal processing to determine a loss on ignition for a representative first portion of a sample of the product; identifying and quantifying primary and secondary peaks present in a first diffraction pattern that results from bulk powder X-ray Diffraction on a representative second portion of the sample; and using a known standard sample of cristobalite to determine whether the primary and secondary peaks present in the first diffraction pattern indicate the presence of opal-C or cristobalite in the product.

Abstract: Products (4) comprising a physical component (6) and Silica Documentation (8), and methods of preparing such products (4) are disclosed. In some embodiments, the physical component (6) may be powdered or in particulate form. The physical component (6) includes diatomite. In such products (4), a crystalline silica content of the physical component (6) by weight is greater as measured according to Traditional Methods than as measured according to a method that differentiates between opal-C and cristobalite. The Silica Documentation (8) discloses the crystalline silica content present in the physical component (6) as measured according to the method that differentiates between opal-C and cristobalite. The method of preparing the product (4) may include analyzing the physical component (6) for crystalline silica content using an LH Method to determine cristobalite content and preparing Silica Documentation (8) based on the results of the LH Method.

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.

Abstract: Filter-aid materials are disclosed herein, and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component. Further disclosed herein are filter-aid materials and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component, and wherein the filter-aid material further comprises an at least one additional filtration component mixed with the at least one filterable composite adsorbent.

Abstract: Filter-aid materials are disclosed herein, and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component. Further disclosed herein are filter-aid materials and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component, and wherein the filter-aid material further comprises an at least one additional filtration component mixed with the at least one filterable composite adsorbent.

Abstract: Filter-aid materials are disclosed herein, and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component. Further disclosed herein are filter-aid materials and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component, and wherein the filter-aid material further comprises an at least one additional filtration component mixed with the at least one filterable composite adsorbent.

Abstract: Disclosed herein is a method for processing diatomaceous earth ore comprising roasting a diatomite feed at a temperature ranging from about 850 to about 1600° F. Also disclosed herein is a method for processing a diatomite feed comprising at least one impurity to produce a diatomite product having at least one of reduced loss-on-ignition, reduced impurity content, reduced beer soluble iron content, and improved brightness as compared to the feed composition. Further disclosed herein is a system for processing a diatomite feed comprising a first heating zone for roasting the diatomite at a temperature ranging from about 850 to about 1600° F., a second zone for calcining the diatomite at a temperature of at least about 1600° F., and a counter-current flow of gas from the second heating zone to the first heating zone.

Abstract: Filter-aid materials are disclosed herein, and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component. Further disclosed herein are filter-aid materials and processes, systems, and methods using such filter-aid materials for filtering and removing particles and/or constituents from a fluid, wherein the filter-aid material comprises at least one filterable composite adsorbent comprising at least one adsorbent component formed in-situ on at least one filtration component, and wherein the filter-aid material further comprises an at least one additional filtration component mixed with the at least one filterable composite adsorbent.

Abstract: This invention relates to highly purified biogenic silica product obtained from diatomite and methods for preparing same. More particularly, this invention pertains to highly purified non-calcined, calcined, and flux-calcined diatomite products which bear the distinguishing porous and intricate structure of silica unique to diatomite and which have an extraordinarily high silica (i.e., silicon dioxide, SiO2) content and low density, resulting in high silica specific volume. These products often also exhibit exceptionally low soluble metals content and/or extreme brightness.

Abstract: This invention relates to highly purified biogenic silica product obtained from diatomite and methods for preparing same. More particularly, this invention pertains to highly purified non-calcined, calcined, and flux-calcined diatomite products which bear the distinguishing porous and intricate structure of silica unique to diatomite and which have an extraordinarily high silica (i.e., silicon dioxide, SiO2) content and low density, resulting in high silica specific volume. These products often also exhibit exceptionally low soluble metals content and/or extreme brightness.

Abstract: This invention relates to highly purified biogenic silica product obtained from diatomite and methods for preparing same. More particularly, this invention pertains to highly purified non-calcined, calcined, and flux-calcined diatomite products which bear the distinguishing porous and intricate structure of silica unique to diatomite and which have an extraordinarily high silica (i.e., silicon dioxide, SiO.sub.2) content and low density, resulting in high silica specific volume. These products often also exhibit exceptionally low soluble metals content and/or extreme brightness.