Imerys Usa, Inc.

Imerys Pigments, Inc.

Christopher Paynter

Douglas Wicks

Dickey S Shurling

David H Anstine

Virendra Singh

Jean-Andre Alary

David Ian Gittins

Janet Preston

Andrew Findlay

David Taylor

Graham M Pring

Kalena Stovall

Nigel Victor Jarvis

Yash Khanna

Gavin Butler-Lee

Parvin Golbayani

Ricardo M Perez

Inorganic particulate compositions containing inorganic particles associated with a copolymer of a hydrophilic monomer and a hydrophobic monomer associated with the inorganic particles are provided. The particulate composition satisfies at least one of the following properties:

Inorganic material composition and utilities thereof

A method for using a composition for use as rock dust in an underground mine is disclosed. The composition includes a fine, wet ground inorganic particulate material treated with at least one hydrophobic treatment, and a coarse, untreated, dry ground inorganic particulate material. Also disclosed is a composition including coal dust and mine rock dust including a fine, wet ground inorganic particulate material treated with at least one hydrophobic treatment, and a coarse, untreated, dry ground inorganic particulate material. The amount of mine rock dust may be sufficient to render the coal dust explosively inert according to at least one of a 20-L explosibility test or an ASTM E1515 explosibility test. The fine, wet ground inorganic particulate material may be calcium carbonate. The coarse, untreated inorganic particulate material may be calcium carbonate. The fatty acid may be stearic acid.

Non-caking mine rock dust for use in underground coal mines

Compositions and methods of using rock dust are disclosed. A mine rock dust may be capable of being applied in a wet form. A moisture tolerant mine rock dust may include a hydrophobic inorganic particulate material. A moisture tolerant mine rock dust may be capable of being dispersed by a light blast of air. A method may include applying a mine rock dust at a concentration having little or no respirable mine rock dust. A method of applying a mine rock dust may include applying a mine rock dust in a wet form. The mine rock dust may be applied at a concentration having little or no respirable mine rock dust. The mine rock dust may include a hydrophobic inorganic particulate material.

Moisture tolerant rock dust and methods of application thereof

A process for treating a sulfurous fluid to form gypsum and magnesium carbonate, whereby the sulfurous fluid is scrubbed with a sequestrating agent to yield a scrubbed fluid, gypsum and magnesium sulfate. The flue gas desulfurized gypsum is isolated from the magnesium sulfate solution by filtration or centrifugation. The magnesium sulfate is reacted with a carbonate salt to produce a magnesium carbonate whereby the reaction conditions are controlled to control the properties of the magnesium carbonate produced.

Process for treating a sulfurous fluid to form gypsum and magnesium carbonate

A method for treating calcium carbonate includes combining calcium carbonate with an amount of stearic acid and an amount of water to form a mixture, the amount of water being at least about 0.1% by weight relative to the total weight. The method further includes blending the mixture to form a stearic acid-treated calcium carbonate composition.

Stearic acid-treated calcium carbonate compositions having low or no detectable free stearic acid and related methods

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Atlanta, GA, United States of America

Christopher Paynter