Patent ID: 7671113

Claim:
A method for the preparation of nanosuspension/nanoemulsion of elastic materials which comprises passing a cavitating liquid through a hydrodynamic cavitation device having a cavitation plate with one or more orifices, passage of said liquid through said one or more orifices causing the pressure of said liquid to drop so as to generate multitude of cavities, simultaneously, feeding a suspension of particulate material to a hydrodynamic cavitation device and circulating said suspension through said cavities, allowing the pressure of said cavitating liquid to recover resulting in collapsing of said cavities, the said collapsing of said cavities and associated high pressure pulse causing size reduction of said particulate material, characterized in that said particulate material is an elastic particulate material having an average particle size of 600 to 1000 microns, wherein said hydrodynamic cavitation device is operated at a pressure of 3 to 20 atm. and at an constriction velocity of 10 to 40 m/s.