Alkali metal ion source with moderate rate of ion release and methods of forming
First Claim
1. A method, comprising:
- milling a combination which comprises i) a particulate alkali metal ion bearing framework silicate; and
ii) a metal oxide and/or a metal hydroxide; and
after milling the combination, hydrothermally processing the combination to provide a gel,wherein milling the combination reduces the size of the particulate alkali metal ion bearing framework silicate so that at least about 50% by weight of the particles of the particulate alkali metal ion bearing framework silicate have a diameter of equal to or less than 5 μ
m as measured by laser-based particle-size distribution analysis.
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Accused Products
Abstract
An alkali metal ion source with a moderate rate of release of the ion (e.g. potassium) is formed by a method that includes: 1) combining an particulate ore that contains at least one of an alkali metal ion-bearing framework silicate (e.g. syenite ore) with at least one of an oxide and hydroxide of at least one of an alkali metal and alkaline earth metal such as calcium hydroxide; 2) milling the mixture of these two components optionally, with water, optionally, milling the dry components separately and blended thereafter, optionally, with water; 3) forming a mixture by adding water to the solid mixture after milling, if water was not added before milling; 4) exposing the mixture to an elevated temperature and pressure to form a gel that includes silica and the alkali metal of the framework silicate.
16 Citations
20 Claims
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1. A method, comprising:
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milling a combination which comprises i) a particulate alkali metal ion bearing framework silicate; and
ii) a metal oxide and/or a metal hydroxide; andafter milling the combination, hydrothermally processing the combination to provide a gel, wherein milling the combination reduces the size of the particulate alkali metal ion bearing framework silicate so that at least about 50% by weight of the particles of the particulate alkali metal ion bearing framework silicate have a diameter of equal to or less than 5 μ
m as measured by laser-based particle-size distribution analysis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification