In this work is presented the study of graphene and nanographite yield from an aqueous mixture of graphite and acrylic associative thickener, HASE (Hyper Alkali swellable emulsion), by ultrasound from the exfoliation of graphite. HASE function is to prevent coalescence of nanographite particles and exfoliated graphene sheets. Treatment times for graphite ultrasonic exfoliation were up to 21 days with sweep of frequencies and amplitudes. Once graphene sheets and nanographite particles were obtained, it was carried out processing of nanocomposites from graphene-nanographite, chemically modified bentonite clay by L-lysine aminoacid salt and carbon nanotubes using polypropylene as thermoplastic matrix, through a twin-screw extrusion process. At the end of the extruder was coupled a static mixing head which generates elongational flows and it is equipped with six piezoelectric elements 50 Watts each, located radially in the head, for developing ultrasonic waves. The results of parallel plate rheometry of the nanocomposites showed the complex viscosity was increased by threefold compared to the viscosity of virgin polypropylene. Nanocomposites tensile mechanical properties were improved and fracture deformation increases up to 100% pointed out excellent dispersion and distribution of nanoparticles on the whole polymer matrix. By Raman spectroscopy was determined the yield of nanographite tactoids and graphene sheets within the graphite ultrasound exfoliation process. Thermogravimetry assay showed HASE 5% weight in compounding made nanocomposites exhibited degradation rate of 1.9 %/°C, lower than that of pristine polypropylene, 2.6 %/°C, making these materials more thermally stable. In addition, these materials had dielectric constants up to 5 times higher that of polypropylene, which make them susceptible to be use in electronic components because the electrostatic charge dissipation property or as electromagnetic shielding radiation materials.