Patent ID: 8470280

Claim:
A method of preparing monodisperse microtablets of calcium carbonate (CaCO 3 ) comprising tablets having particle sizes in the range of 1 to 8 microns, wherein said method comprises the steps of: (a) dissolving calcium chloride dihydrate salt in deionized water at room temperature to obtain a solution containing aqueous Ca 2+ ions, (b) dissolving gelatin in the solution produced in step (a) at room temperature, (c) dissolving urea (NH 2 CONH 2 ) in the solution produced in step (b) at room temperature, (d) placing the solution produced in step (c) into a glass container and thereafter tightly sealing the glass container, (e) refrigerating the solution of step (d) at 4° C. for a period of 24 hours, (f) heating the solution of step (e) at 70° for a period of 24 hours to form microtablets, (g) recovering the formed microtablets by filtering the solution produced in step (f), and (h) drying the microtablets from step (g) at 37° C. in an air atmosphere.