Back to results
US 7,407,546 B2Granted
Method of removing ammonia from fly ash and fly ash composition produced thereby
AssigneeBoral Material Technologies Inc.
InventorsRussell L. Hill, Carmel Jolicoeur, Thi Cong To
Life of this patent
Estimating the term…
Abstract
A method of treating fly ash and fly ash treated thereby, the method involving contacting ammonia-laden fly ash with an organic base-containing treatment composition, where the organic base causes the ammonia within the fly ash to evolve from the fly ash. The treatment composition preferably includes an effective amount of one or more amines. The treatment compound may be applied to the fly ash in any manner effective to disperse the treatment compound among the fly ash.
Claims22
A process for the production of cementitious material comprising the steps of
- supplying an ammonia-laden fly ash;
- supplying a treatment composition comprising one or more organic bases;
- contacting the ammonia-laden fly ash with the treatment composition to produce a treated fly ash having an ammonia content of less than about 150 ppm per total weight of the treated fly ash;
- and
- mixing the treated fly ash with a hydraulic cement.
2 more elements
Dependencies are inferred from the claim text.