Anhydrous, amorphous and porous magnesium carbonates and methods of production thereof
AssigneeDisruptive Materials AB
InventorsMaria STRÖMME, Albert MIHRANYAN, Johan GÓMEZ DE LA TORRE, Sara FRYKSTRAND ÅNGSTRÖM
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Abstract
An X-ray amorphous magnesium carbonate is disclosed that is characterized by a cumulative pore volume of pores with a diameter smaller than 10 nm of at least 0.018 cm3/g, and a specific surface areas of at least 60 m2/g. The X-ray amorphous magnesium carbonate is produced by reacting an inorganic magnesium compound with alcohol in a CO2 atmosphere. The X-ray amorphous magnesium carbonate can be a powder or a pellet and acts as a desiccant in, for example, production of food, chemicals or pharmaceuticals.
Claims16
A mesoporous composite carbonate material comprising:
- X-ray amorphous and anhydrous magnesium carbonate;
- and
- a second component,
- wherein the second component is a salt, a hydroxide, an oxide, or a combination thereof,
- wherein the mesoporous composite material has an incremental pore volume in cm3/g that has a maximum value for pores with a diameter of 10 nm or less, and
- wherein the incremental pore volume is measured by nitrogen sorption.
A mesoporous composite carbonate material comprising:
- calcium carbonate;
- and
- X-ray amorphous and anhydrous magnesium carbonate,
- wherein the mesoporous composite material has an incremental pore volume in cm3/g that has a maximum value for pores with a diameter between 2 and 10 nm, the incremental pore volume measured by nitrogen sorption.
A method to produce a mesoporous composite carbonate material, the method comprising the steps of:
- preparing a powder phase comprising MgO and a second component, wherein the second component is a salt, a hydroxide, an oxide, or a combination thereof and wherein an amount of the second component is from >0 to 50 wt %;
- and
- reacting MgO and the second component with alcohol in a CO2 atmosphere at a pressure above atmospheric pressure and a temperature between 40° C. and a boiling temperature of the alcohol,
- wherein the produced mesoporous composite carbonate material comprises X-ray amorphous and anhydrous magnesium carbonate and the second component, and
- wherein the produced mesoporous composite material has an incremental pore volume in cm3/g that has a maximum value for pores with a diameter of 10 nm or less, the incremental pore volume measured by nitrogen sorption.
Dependencies are inferred from the claim text.