Multi-grafting site carbon nanomaterial and activated carbon nanomaterial and preparation method thereof and displacement system for ultra-low permeability oil reservoirs

US11247909B1 · kind B1 · utility

Assignees

• CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN
• CHINA UNIVERSITY OF GEOSCIENCES (BEIJING) · CN

Inventors

• Guang Zhao · Qingdao, CN
• Caili Dai · Qingdao, CN
• Lihao Liang · Qingdao, CN
• Dongfang Lyu · Qingdao, CN
• Qing You · Beijing, CN
• Yifei Liu · Beijing, CN
• Ning Yang · Los Angeles, US
• Ning Sun · Fremont, US

Key dates

• Filing date: Apr 22, 2021
• Grant date: Feb 15, 2022
• Expiry date: Apr 22, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present disclosure discloses a multi-grafting site carbon nanomaterial comprising a structural unit represented by Formula (1), hydroxyl groups and a structural unit represented by Formula (2); wherein R is one or more selected from the group consisting of tolyl, diphenylmethyl, isophorone group and dicyclohexylmethyl;