Process for producing geopolymers
AssigneeOutotec Oyj
InventorsEdgar Gasafi, Katja Dombrowski-Daube
Life of this patent
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Abstract
The present invention relates to the production of geopolymers from oil shale and/or mineral residues, which originate from the production of oil by means of oil shale. To use the residues left in the combustion of oil shale for the production of geopolymers, the oil shale and/or also mineral residues, which originate from the production of oil by means of shale are burnt and subsequently ground, before they are mixed with an alkaline activator and water and cured.
Claims14
1-10. (canceled)
A process for producing a geopolymer, comprising:
- combusting at least one of oil shale and mineral residues so as to produce a combustion product, the at least one oil shale and mineral residues originating from a production of oil using the oil shale;
- grinding the combustion product;
- adding an alkaline activator to the combustion product to form a geopolymer mixture;
- adding water to the geopolymer mixture;
- adjusting the geopolymer mixture so as to obtain a mol ratio of Si:Al of 2 to 5, a mol ratio of K:Al of 0.6 to 0.7, a mol ratio of Si:K of 3 to 10, a mol ratio of Ca:Al of 0.1 to 0.4, and a mol ratio of Si:CA of 4.9 to 41;
- and
- hardening the geopolymer mixture.
A geopolymer having a mol ratio of Si:Al of 2 to 5, a mol ratio of K:Al of 0.6 to 0.7, a mol ratio of Si:K of 3 to 10, a mol ratio of Ca:Al of 0.1 to 0.4, and a mol ratio of Si:CA of 4.9 to 41, the geopolymer being produced by a process comprising:
- combusting at least one of oil shale and mineral residues so as to produce a combustion product, the at least one oil shale and mineral residues originating from a production of oil using the oil shale;
- grinding the combustion product;
- adding an alkaline activator to the combustion product so as to form a geopolymer mixture;
- adding water to the geopolymer mixture;
- and
- hardening the geopolymer mixture.
Dependencies are inferred from the claim text.