US 11,691,927 B2
Potassium-releasing material
Davide Ciceri, Washoe Valley, NV (US); Marcelo De Oliveira, Boston, MA (US); Antoine Allanore, Brentwood, NH (US); Dennis P. Chen, Boston, MA (US); and Thomas C. Close, Cambridge, MA (US)
Assigned to Massachusetts Institute of Technology (MIT), Cambridge, MA (US); and Advanced Potash Technologies Ltd, Camana Bay (KY)
Filed by Massachusetts Institute of Technology, Cambridge, MA (US); and Advanced Potash Technologies Ltd, Camana Bay (KY)
Filed on Oct. 1, 2020, as Appl. No. 17/61,092.
Application 17/061,092 is a continuation of application No. 15/874,801, filed on Jan. 18, 2018, granted, now 10,800,712.
Claims priority of provisional application 62/520,976, filed on Jun. 16, 2017.
Claims priority of provisional application 62/447,657, filed on Jan. 18, 2017.
Prior Publication US 2021/0053885 A1, Feb. 25, 2021
Int. Cl. C05D 1/04 (2006.01); C05D 3/00 (2006.01); C05D 5/00 (2006.01); C05D 9/02 (2006.01)
CPC C05D 1/04 (2013.01) [C05D 3/00 (2013.01); C05D 5/00 (2013.01); C05D 9/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
exposing a first composition to water and conditions selected from the group consisting of heat and pressure, thereby forming a combination comprising water and a second composition, the second composition comprising a K-feldspar phase; and
removing at least some of the water from the combination, thereby providing a third composition;
wherein:
the third composition comprises the K-feldspar phase in an amount of at most about 65 wt. %; and
at least one of the following holds:
the third composition further comprises at least about 1 wt. % of a dicalcium silicate hydrate phase;
the third composition further comprises at least about 1 wt. % of a tobermorite phase; and
the third composition further comprises at least about 1 wt. % of a hydrogarnet phase.