Group 1 - China Petroleum & Chemical Corporation (Sinopec) has applied for a patent titled "A Method for Determining Dimers of Polyoxymethylene Dimethyl Ether in Gasoline," with publication number CN121298960A, filed on November 2025 [1] - The patent describes a method involving the construction of a gas chromatography system for separating and detecting components in gasoline, including the use of polar and non-polar columns for analysis [1] - The method includes establishing a quantitative calibration curve and calculating the mass ratio of PODE₂ in gasoline based on the peak area ratio of PODE₂ to an internal standard [1] Group 2 - China Petroleum & Chemical Corporation was established in 2000, located in Beijing, primarily engaged in oil and natural gas extraction, with a registered capital of approximately 12.17 billion RMB [2] - Sinopec has invested in 268 companies, participated in 5000 bidding projects, and holds 5000 patent records along with 45 trademark records [2] - China Petroleum Sales Company, established in 1985, is also based in Beijing, focusing on wholesale, with a registered capital of approximately 2.84 billion RMB [2] - The sales company has invested in 1513 companies, participated in 5000 bidding projects, and holds 235 patent records along with 304 trademark records [2]
中国石化申请测定汽油中聚甲氧基二甲醚二聚体方法专利,可换算为汽油中PODE₂的质量百分比浓度