# US 12,006,579 B2 · Magnetic carbon nanomaterials and methods of making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,579 B2 - Document ID: US12006579B2 - Status: Granted - Kind: B2 - Application number: 17/987,638 - Filed: 2022-11-15 - Published: 2023-03-16 - Granted: 2024-06-11 - Earliest claimed: 2020-05-08 - Assignees: C2Cnt LLC - Applicants: C2Cnt LLC - Inventors: Stuart Licht - Web page: https://patentgrep.com/patent/US12006579B2 ## CPC - C01B 32/15: Nano-sized carbon materials - C25B 1/135: Carbon - C01B 32/16: Preparation - C01B 32/168: After-treatment - C01B 32/18: Nanoonions; Nanoscrolls; Nanohorns; Nanocones; Nanowalls - C01B 32/184: Preparation - C25B 1/50: Processes - C25B 9/09: Fused bath cells - C25B 9/17: Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof - C25B 9/60: Constructional parts of cells - C25B 9/67: Heating or cooling means - C25B 11/046: Alloys - C25B 11/061: Metal or alloy - C25B 15/02: Process control or regulation - C25B 15/08: Supplying or removing reactants or electrolytes; Regeneration of electrolytes - D01F 11/12: with inorganic substances {; Intercalation} - B82Y 25/00: Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance - B82Y 35/00: Methods or apparatus for measurement or analysis of nanostructures - B82Y 40/00: Manufacture or treatment of nanostructures - C01B 2202/06: Multi-walled nanotubes - C01B 2202/20: Nanotubes characterized by their properties - C01P 2006/42: Magnetic properties - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B) - D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS ## Abstract The embodiments of the present disclosure relate to a method, system and composition producing a magnetic carbon nanomaterial product that may comprise carbon nanotubes (CNTs) at least some of which are magnetic CNTs (mCNTs). The method and apparatus employ carbon dioxide (CO2) as a reactant in an electrolysis reaction in order to make mCNTs. In some embodiments of the present disclosure, a magnetic additive component is included as a reactant in the method and as a portion of one or more components in the system or composition to facilitate a magnetic material addition process, a carbide nucleation process or both during the electrosynthesis reaction for making magnetic carbon nanomaterials. ## Claims ### Claim 1 A method for producing a magnetic carbon nanomaterial product comprising: (a) heating an electrolyte media to obtain a molten electrolyte media; (b) positioning the molten electrolyte media between an anode and a cathode of an electrolytic cell; (c) introducing a magnetic additive component within the electrolytic cell; (d) introducing a source of carbon within the electrolytic cell; (e) applying an electrical current to the cathode and the anode in the electrolytic cell; and (f) collecting the magnetic carbon nanomaterial product from the cathode, wherein the magnetic carbon nanomaterial product is moveable with a magnetic field and the magnetic carbon nanomaterial product comprises a plurality of individual constituent magnetic nano-structures and wherein the magnetic additive component is incorporated beyond a base of each individual constituent magnetic nano-structure within the magnetic carbon nanomaterial product. ### Claim 2 (depends on 1) The method of claim 1, wherein the magnetic additive component is present within each individual constituent structure in an amount greater than 1 wt %. ### Claim 3 (depends on 1) The method of claim 1, wherein the magnetic additive component is incorporated throughout each individual constituent structure. ### Claim 4 (depends on 1) The method of claim 1, wherein the magnetic additive component comprises a magnetic material addition component, a carbide-growth component or any combination thereof. ### Claim 5 (depends on 1) The method of claim 1, further comprising: selecting a nano-morphology of the constituent magnetic nano-structures of the magnetic carbon nanomaterial product to comprise a magnetic carbon nanotube product, a magnetic carbon nanofiber product, a magnetic carbon platelet product, a magnetic graphene product, a magnetic carbon nano-onion product, a magnetic, a hollow carbon nano-sphere product or any combination thereof. ### Claim 6 (depends on 1) The method of claim 1, wherein the magnetic additive component comprises at least one of a magnetic material addition component, a carbide-growth component or any combination thereof. ### Claim 7 (depends on 6) The method of claim 6, wherein the magnetic material additive component is one or more of iron, nickel, cobalt, gadolinium, samarium, neodymium, steel and alloys comprising one or more magnetic materials with ferromagnetic properties, paramagnetic properties, diamagnetic properties or any combination thereof. ### Claim 8 (depends on 6) The method of claim 6, wherein the carbide-growth component is a metal carbide. ### Claim 9 (depends on 8) The method of claim 8, wherein the metal carbide is one of an iron carbide, a nickel carbide, a cobalt carbide; a zirconium carbide, a chromium carbide, a tantalum carbide, a hafnium carbide or any combination thereof. ### Claim 10 (depends on 6) The method of claim 6, wherein the carbide-growth component is a non-metal carbide. ### Claim 11 (depends on 10) The method of claim 10, wherein the non-metal carbide is one of a silicon carbide, a germanium carbide or any combination thereof. ### Claim 12 (depends on 1) The method of claim 1, wherein the magnetic additive component originates from one or more walls of the electrolysis cell, from the anode, from the cathode, the electrolyte media or any combination thereof.