Potassium-releasing material
AssigneesMassachusetts Institute of Technology, Advanced Potash Technologies Ltd
InventorsDavide Ciceri, Marcelo de Oliveira, Antoine Allanore, Dennis P. Chen, Thomas C. Close
Life of this patent
Estimating the term…
Abstract
The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and/or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.
Claims20
A soil health product, comprising:
- a K-feldspar phase;
- and
- a calcium silicate hydrate phase comprising at least one phase selected from the group consisting of a dicalcium silicate hydrate phase, a tobermorite phase, and a hydrogarnet phase;
- wherein:
- the soil health product is configured to alter soil health;
- the soil health product comprises the K-feldspar phase in an amount of at most about 65 wt. %;
- and
- at least one of the following holds:
- the soil health product comprises at least about 1 wt. % of the dicalcium silicate hydrate phase;
- the soil health product comprises at least about 1 wt. % of the tobermorite phase;
- and
- the soil health product comprises at least about 1 wt. % of the hydrogarnet phase.
Dependencies are inferred from the claim text.