US 2025/0026657 A1 · EXTRACTION OF ALKALI FROM SILICATES

Abstract

Described is a method for extracting alkali from silicates under carbon neutral conditions. The method involves providing a reaction mixture containing an alkali-bearing aluminosilicate composition and an alkali base composition. The reaction mixture is treated with a combined activation and leaching process to form a concentrated alkali-silicate solution and an alkali aluminosilicate solid residue, where carbon dioxide is produced as a carbon dioxide reusable co-product from the activation. The alkali aluminosilicate solid residue is reacted with a first portion of the carbon dioxide reusable co-product to form an alkali leached aluminosilicate composition, thereby extracting alkali from the alkali-bearing aluminosilicate composition. Also described are methods of making inorganic polymer cement and concrete from the products and/or co-products produced by the method of extracting.

Claims43

Dependent claims

A method for extracting potassium, sodium, or both potassium and sodium from silicates under carbon neutral conditions, said method comprising:

(a) providing a reaction mixture comprising a first reactant and a second reactant, wherein the first reactant comprises a potassium-bearing aluminosilicate composition, a sodium-bearing aluminosilicate composition, or a mixture thereof, and wherein the second reactant comprises a corresponding potassium base composition, sodium base composition, or a mixture thereof;
(b) treating the reaction mixture with a combined activation and leaching process to form a concentrated potassium-silicate solution, sodium-silicate solution, or mixture thereof and a corresponding potassium aluminosilicate solid residue, sodium aluminosilicate solid residue, or mixture thereof, wherein carbon dioxide is produced as a carbon dioxide reusable co-product from the activation;
and
(c) reacting the potassium aluminosilicate solid residue, the sodium aluminosilicate solid residue, or the mixture thereof with a first portion of the carbon dioxide reusable co-product to form a potassium leached aluminosilicate composition, a sodium leached aluminosilicate composition, or a mixture thereof, thereby extracting potassium, sodium, or a mixture thereof from the corresponding potassium-bearing aluminosilicate composition, sodium-bearing aluminosilicate composition, or mixture thereof.

1 more element

Dependencies are inferred from the claim text.

Extraction of alkali from silicates

Life of this patent

Extraction of alkali from silicates

Life of this patent

Abstract

Claims43