Sou Hu Cai Jing·2025-07-29 05:57Group 1 - China Petroleum & Chemical Corporation (Sinopec) has applied for a patent for a method of continuously preparing cycloolefin copolymers, with the patent number CN120383694A and application date January 2024 [1] - The patented method involves a two-step process: first, synthesizing norbornene from ethylene and dicyclopentadiene in a toluene solution under high temperature and pressure, followed by a copolymerization reaction with ethylene [1] - The method is noted for its economic advantages and operational convenience, as the norbornene toluene solution is easier to transport and separate due to the similar boiling points of norbornene and toluene [1] Group 2 - China Petroleum & Chemical Corporation was established in 2000, located in Beijing, primarily engaged in oil and gas extraction, with a registered capital of approximately 12.17 billion RMB [2] - Sinopec has invested in 263 companies, participated in 5000 bidding projects, and holds 5000 patent records [2] - Sinopec Shanghai Petrochemical Company, established in 1993 in Shanghai, focuses on oil, coal, and other fuel processing, with a registered capital of approximately 1.08 billion RMB [2] - Sinopec Shanghai has invested in 22 companies, participated in 5000 bidding projects, and holds 1295 patent records [2]