Patent ID: 11969708
Assignee: KING SAUD UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  E | IPC B  C  E

Claim 3:
4. The method for preparing nanoparticles modified by a cardanol imidazolium ionic liquid as recited in claim 1, wherein the nanoparticles comprise modified calcium carbonate nanoparticles, the method comprising:
preparing an aqueous solution of calcium carbonate (Ca(OH)2) in water;
adding a solution of a cardanyl imidazolium ionic liquid selected from the group consisting of a cardenyl polyethoxy imidazolium ionic liquid (CEOIm), a dicardenoxy imidazolium ionic liquid (DCIm), a dicardnyl tri-imidazolium ionic liquid (DCTIm), and a combination thereof in ethanol to the aqueous solution of calcium carbonate to obtain a reaction solution;
adding CO2 bubbles through the reaction solution until the reaction solution reaches a pH of about 7; and
separating the modified calcium carbonate nanoparticles by centrifugation, wherein the modified calcium carbonate nanoparticles are selected from the group consisting of CaCO3/CEOIm, CaCO3/DCIm, CaCO3/DCTIm, and combinations thereof.