Potassium-releasing material

Patent metadata

Field	Value
Publication number	US-2025178981-A1
Application number	US-202519028114-A
Country	US
Kind code	A1
Filing date	Jan 17, 2025
Priority date	Jan 18, 2017
Publication date	Jun 5, 2025
Grant date	—

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 (Mg 2+ , Ca 2+ ). 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.

First claim

1 . (canceled)

2 . A composition, comprising:
a K-feldspar phase; 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; and a plurality of nutrients.

3 . The composition of claim 2 , wherein the plurality of nutrients comprises at least two members selected from the group consisting of magnesium, silicon, calcium, and potassium.

4 . The composition of claim 2 , wherein the plurality of nutrients comprises at least three members selected from the group consisting of magnesium, silicon, calcium, and potassium.

5 . The composition of claim 2 , wherein the plurality of nutrients comprises magnesium, silicon, calcium, and potassium.

6 . The composition of claim 2 , wherein different nutrients are released from the composition at different rates.

7 . The composition of claim 2 , wherein the plurality of nutrients comprises a plurality of micronutrients.

8 . The composition of claim 2 , wherein the composition is a fertilizer.

9 . The composition of claim 2 , wherein the composition is a soil health product.

10 . The composition of claim 9 , wherein the soil health product is a soil remediation product.

11 . The composition of claim 9 , wherein the soil health product is a soil conditioner.

12 . The composition of claim 9 , wherein the soil health product is a soil fertility product.

13 . The composition of claim 9 , wherein the soil health product is configured to buffer soil pH.

14 . The composition of claim 9 , wherein soil health product is configured to improve soil pore space.

15 . The composition of claim 9 , wherein the soil health product is configured to improve soil mechanics.

16 . The composition of claim 9 , wherein the soil health product is configured to improve cation exchange capacity.

17 . The composition of claim 9 , wherein the soil health product is configured to provide high water retention capacity.

18 . The composition of claim 2 , wherein the composition comprises the K-feldspar phase in an amount of at most about 65 wt. %, and at least one of the following holds:
the composition comprises at least about 1 wt. % of the dicalcium silicate hydrate phase; the composition comprises at least about 1 wt. % of the tobermorite phase; and the composition comprises at least about 1 wt. % of the hydrogarnet phase.

19 . The composition of claim 2 , further comprising an amorphous phase.

20 . The composition of claim 2 , further comprising a zeolite.

21 . The composition of claim 2 , further comprising one or more carbonates.

22 . The composition of claim 2 , wherein at least one of the following holds:
the composition has a potassium release of at least about 5,000 mg of potassium per kilogram of the composition according to the 24-hour potassium release test; the composition has a calcium release of at least 15 mg of calcium per kilogram of the composition according to the 24-hour calcium release test; the composition has a silicon release of at least 40 mg of silicon per kilogram of the composition according to the 24-hour silicon release test; the composition has a magnesium release of at least 5 mg of magnesium per kilogram of the composition according to the 24-hour magnesium release test.

23 . The composition of claim 2 , further comprising a carbonaceous material.

24 . The composition of claim 2 , wherein the composition comprises particles having a specific surface area according to the BET method of from about 15.1 square meters per gram to about 46.9 square meters per gram.

25 . The composition of claim 2 , wherein the composition has a multimodal particle size distribution comprising particles having a diameter of from about 1 micron to about 1000 microns.

26 . The composition of claim 2 , wherein the composition comprises aggregated particles having a size of from about 100 microns to about 1000 microns.

27 . The composition of claim 2 , wherein the composition has a particle size distribution of from about 0.01 micron to about 100 microns.

Assignees

• Massachusetts Inst Technology
• Advanced Potash Tech Ltd

Inventors

• Ciceri Davide
• De Oliveira Marcelo
• Allanore Antoine
• Chen Dennis P
• Close Thomas C

Classifications

• C05D9/02

  containing trace elements · CPC title

• C05D5/00

  Fertilisers containing magnesium (C05D7/00 takes precedence) · CPC title

• C05D3/00

  Calcareous fertilisers (C05D7/00 takes precedence) · CPC title

• Y02P40/10

  Production of cement, e.g. improving or optimising the production methods; Cement grinding · CPC title

• C01B33/26

  Aluminium-containing silicates {, i.e. silico-aluminates} · CPC title