Sou Hu Cai Jing·2026-01-07 04:23Group 1 - The core point of the article is that China Petroleum & Chemical Corporation (Sinopec) has obtained a patent for a method of synthesizing diphenylamine, with the patent announcement number CN119661372B and an application date of September 2023 [1] Group 2 - China Petroleum & Chemical Corporation was established in 2000 and is based in Beijing, primarily engaged in oil and gas extraction. The company has a registered capital of approximately 12.17 billion RMB [1] - Sinopec has made investments in 267 companies and participated in 5,000 bidding projects. It holds 45 trademark registrations and 5,000 patent records, along with 41 administrative licenses [1] Group 3 - Sinopec (Dalian) Petrochemical Research Institute Co., Ltd. was established in 2022 and is located in Dalian, focusing on research and experimental development. The registered capital of this subsidiary is approximately 338.46 million RMB [1] - The Dalian research institute has invested in 1 company, participated in 2,826 bidding projects, and holds 5,000 patent records, in addition to 65 administrative licenses [1]