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US 2026/0184589 A1Published application
Methods for preparing amorphous calcium carbonate by fixation of carbon dioxide
AssigneeAmorphical Ltd.
InventorsYossi BEN, Yigal Dov BLUM, Eden BEN, Ben ASHKENAZI, Roni Antoine ILLOS
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Abstract
The present invention provides methods for fixating carbon dioxide and preparation of stabilized amorphous alkaline earth metal carbonate.
Claims21
1-44. (canceled)
A method of preparing a stabilized amorphous alkaline earth metal carbonate, the method comprising:
- (i) dissolving a base in an aqueous solution, wherein the resulting solution has a pH equal to or above 8;
- (ii) bubbling or pressurizing CO2 gas into the solution obtained in step (i) followed by adding a salt of an alkaline earth metal;
- or
- adding a salt of an alkaline earth metal into the solution obtained in step (i) followed by bubbling or pressurizing CO2 gas into the solution,
- thereby precipitating an amorphous alkaline earth metal carbonate;
- (iii) collecting the resulting amorphous alkaline earth metal carbonate precipitate;
- and
- (iv) adding at least one stabilizer in at least one of the following stages:
- (a) before bubbling or pressurizing CO2 gas;
- (b) after bubbling or pressurizing CO2 gas;
- (c) before adding the salt of an alkaline earth metal, (d) together with adding the salt of an alkaline earth metal, or (e) after adding the salt of an alkaline earth metal.
8 more elements
A method of preparing a stabilized amorphous alkaline earth metal carbonate, the method comprising:
- providing an aqueous solution having a pH equal to or above 8 and:
- (i) continuously adding to the aqueous solution a base, at least one stabilizer, and an alkaline earth metal, (ii) continuously bubbling or pressurizing CO2 gas into the solution, and (iii) continuously collecting the resulting amorphous alkaline earth metal carbonate precipitate, wherein the pH is constantly maintained equal to or above 8 during the whole process.
Dependencies are inferred from the claim text.