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US 2025/0018364 A1Published application
Modified biochar/coal lignites and their use in phosphate remediation and as solid amendments
AssigneesThe George Washington University, Mississippi State University
InventorsRichard Clive MILLAR, Todd MLSNA, Sita WARREN
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Abstract
The present disclosure relates to improved processes for preparing modified lignite by reacting raw lignite with a source of magnesium (Mg2+) ions and a source of calcium (Ca2+) ions, washing the modified lignite (e.g., with water), drying, and pyrolyzing the treated lignite, and to the use of such products for phosphorous remediation.
Claims19
A process for preparing a modified lignite, the process comprising
- (i) reacting raw lignite with a source of Mg2+ ions and a source of Ca2+ ions;
- (ii) optionally further reacting the lignite with a source of K+ ions;
- (iii) optionally drying the treated lignite;
- and
- (iv) pyrolyzing the treated lignite, thereby producing the modified lignite.
2 more elements
A process for preparing a fertilizer and/or soil amendment, the process comprising:
- (i) reacting raw lignite with a source of Mg2+ ions and a source of Ca2+ ions;
- (ii) optionally further reacting the lignite with a source of K+ ions;
- (iii) optionally drying the treated lignite;
- and
- (iv) pyrolyzing the treated lignite;
- (v) contacting the product of step (iv) with a solution containing phosphorous;
- (vi) allowing the treated lignite to adsorb phosphorous from the solution;
- and
- (vii) drying the product of step (vi).
6 more elements
Dependencies are inferred from the claim text.