METHOD FOR PRODUCING PURIFIED GRAPHITE

• Main Authors: FELBINGER, Thomas, GRAF, Christian, WEIDLER, Tobias, RISCHE, Daniel
• Format: Patent
• Language: English
• Published: 26.09.2024
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention relates to a method for producing purified graphite, having the following steps: - carrying out a first acid leaching process on a graphite starting material using an acid at a temperature of maximally 100 °C for a specified first reaction duration, - carrying out a first filtration process in order to produce a first residue and a first filtrate, - washing the first residue using distilled water, - carrying out a base decomposition process on a mixture of a base and the first washed residue at a temperature ranging from 350 °C to 550 °C for specified second reaction duration, - carrying out a leaching process on the mixture using water for a specified third reaction duration, - carrying out a second filtration in order to produce a second residue and a second filtrate, - washing the second residue using distilled water, - carrying out a second acid leaching process on the washed second residue using an acid at a temperature of maximally 100 °C for a specified fourth reaction duration, - carrying out a third filtration process in order to produce a third residue and a third filtrate, and - washing the third residue using distilled water.