# US 10,766,774 B2 · Oxidized graphite derivative and method for producing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,774 B2 - Document ID: US10766774B2 - Status: Granted - Kind: B2 - Application number: 15/775,526 - Filed: 2016-11-08 - Published: 2018-11-15 - Granted: 2020-09-08 - Earliest claimed: 2015-11-12 - Assignees: Nippon Shokubai Co., Ltd. - Applicants: Nippon Shokubai Co., Ltd. - Inventors: Syun Gohda; Hironobu Ono; Osamu Konosu; Shin-ichi Okuoka - Web page: https://patentgrep.com/patent/US10766774B2 ## CPC - C01B 32/23: Oxidation - C01B 32/198: Graphene oxide - C01B 32/21: After-treatment - C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram - C01P 2002/82: by IR- or Raman-data - C10M 103/02: Carbon; Graphite - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) ## Abstract Provided are a method for producing a graphite oxide derivative capable of simply producing a high-quality graphite oxide derivative, and a high-quality graphite oxide derivative. The present invention relates to a method for producing a graphite oxide derivative, the method including the steps of oxidizing graphite; and preparing a graphite oxide derivative by reacting graphite oxide in a reaction liquid containing graphite oxide obtained in the oxidation step or graphite oxide in a graphite oxide-containing composition that is separated from the reaction liquid with a compound reactive with an oxygen-containing functional group of the graphite oxide, the method not including the step of purifying and drying the graphite oxide-containing reaction liquid between the oxidation step and the graphite oxide derivative preparation step. ## Claims ### Claim 1 A method for producing a graphite oxide derivative, the method comprising the steps of: oxidizing graphite using sulfuric acid; and preparing a graphite oxide derivative by reacting graphite oxide in a graphite oxide-containing composition obtained in the oxidation step and a compound reactive with an oxygen-containing functional group of the graphite oxide, the method not comprising a step of purifying the graphite oxide-containing composition between the oxidation step and the graphite oxide derivative preparation step, wherein a sulfuric acid concentration is 1% by mass or more of the mass of the graphite oxide during the oxidation step and the graphite oxide derivative preparation step. ### Claim 2 (depends on 1) The method for producing a graphite oxide derivative according to claim 1, the method further comprising, between the oxidation step and the graphite oxide derivative preparation step: the steps of adding a solvent that has a solubility in water of 0.01% or higher and is not arbitrarily miscible with water to the graphite oxide-containing composition and then separating the graphite oxide-containing composition. ### Claim 3 (depends on 1) The method for producing a graphite oxide derivative according to claim 1, wherein the compound reactive with an oxygen-containing functional group of the graphite oxide is an alcohol and/or an amine. ### Claim 4 (depends on 1) The method for producing a graphite oxide derivative according to claim 1, wherein the graphite oxide derivative preparation step includes the step of reacting the graphite oxide and the compound reactive with an oxygen-containing functional group of the graphite oxide at a reaction temperature of 120° C. or higher. ### Claim 5 (depends on 1) The method for producing a graphite oxide derivative according to claim 1, wherein the graphite oxide-containing composition for use in the reaction in the graphite oxide derivative preparation step contains sulfuric acid in an amount of 1% by mass or more and 1000% by mass or less for 100% by mass of the graphite oxide in the composition. ### Claim 6 (depends on 1) The method for producing a graphite oxide derivative according to claim 1, wherein the graphite oxide-containing composition for use in the reaction in the graphite oxide derivative preparation step contains water in an amount of 3% by mass or more and 10000% by mass or less for 100% by mass of the graphite oxide in the composition. ### Claim 7 (depends on 3) The method for producing a graphite oxide derivative according to claim 3, wherein the alcohol is an aliphatic alcohol and the amine is an aliphatic amine. ### Claim 8 (depends on 2) The method for producing a graphite oxide derivative according to claim 2, wherein the solvent has a solubility in water of 0.5% or higher. ### Claim 9 (depends on 2) The method for producing a graphite oxide derivative according to claim 2, wherein the solvent is added in an amount of 1% to 1000% by mass for 100% by mass of the graphite oxide in the graphite oxide-containing composition. ### Claim 10 (depends on 2) The method for producing a graphite oxide derivative according to claim 2, wherein the graphite oxide-containing composition is separated by any of filtration, decantation, centrifugation, and separation extraction. ### Claim 11 (depends on 10) The method for producing a graphite oxide derivative according to claim 10, wherein the graphite oxide-containing composition is separated by filtration. ### Claim 12 (depends on 1) The method for producing a graphite oxide derivative according to claim 1, wherein the oxidation step is a step of adding a permanganate to a liquid mixture containing graphite and sulfuric acid.