ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,635, issued on Aug. 11.
"Exfoliation of graphene from biochar" was invented by Rey J Rubio (Miami).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process for the efficient and cost-effective preparation of graphene from a natural source of carbon, resulting from the combination of mild, natural acids, including citric and acetic acids, with sonic frequency, as well as the use of magnets, to exfoliate graphene nanoplatelets from the natural carbon source. The natural carbon source, referred to as Biochar, can be any organic matter based and converted via pyrolytic and/or gasification means. The process includes tuning the frequency of sound energy t...