Nanographene and preparation method and use thereof and oil-based drilling fluid

US11873444B1 · kind B1 · utility

Assignee

• Southwest Petroleum University · CN

Inventors

• Yang Bai · Beaverton, US
• Daoxiong Li · Chengdu, CN
• Ren Wang · Beijing, CN
• Gang Xie · Nanhu, CN
• Danchao Huang · Chengdu, CN
• Wenzhe Li · Middletown, US
• Feng-Wei Dai · Beijing, CN
• Jintang Wang · Qingdao, CN
• Jing Zhang · Suzhou, CN
• Jinsheng Sun · Qingdao, CN

Key dates

• Filing date: Feb 27, 2023
• Grant date: Jan 16, 2024
• Expiry date: Feb 27, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/62
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A nanographene, a preparation method thereof, and uses thereof are disclosed. The method of preparing the nanographene includes the steps: (1) carrying out a first reaction by contacting a raw material graphite and a first oxidizing agent with an intercalating agent to obtain a modified graphite; (2) performing a second reaction by contacting the modified graphite and an acid with a second oxidizing agent to obtain a graphene pre-product; and (3) subjecting the graphene pre-product to an air-flow exfoliation to prepare a nanographene. An oil-based drilling fluid containing the nanographene produced by the method is also disclosed.