Brimstone Energy Inc.

California Institute of Technology

Hugo Francois Leandri

Cody E Finke

Michael J Dry

Evody Tshijik Karumb

Nydra Harvey-Costello

James Alexis Bresson

Vivek Kashyap

Margaret Josephine Keller

Methods and composition are provided for deriving cement and/or supplementary cementitious materials, such as pozzolans, from one or more non-limestone materials, such as one or more non-limestone rocks and/or minerals. The non-limestone materials, e.g., non-limestone rocks and/or minerals, are processed in a manner that a desired product, e.g., cement and/or supplementary cementitious material, is produced.

Cementitious material production from non-limestone material

Aspects of the invention include a method of producing a cement material comprising step of: first reacting a calcium-bearing starting material with a first acid to produce an aqueous first calcium salt; second reacting the aqueous first calcium salt with a second acid to produce a solid second calcium salt; wherein the second acid is different from the first acid and the second calcium salt is different from the first calcium salt; and thermally treating the second calcium salt to produce a first cement material. Preferably, but not necessarily, during the second reacting step, reaction between the first calcium salt and the second acid regenerates the first acid.

Process to make calcium oxide or ordinary Portland cement from calcium bearing rocks and minerals

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Oakland, CA, United States of America

Hugo Francois Leandri