China National Petroleum Corporation receives patent approval for: “Ziegler-Natta catalysts for the polymerization or copolymerization of ethylene and their applications””

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According to data from the Tianyancha app, China Petroleum (601857) has obtained a new invention patent, titled “Ziegler-Natta catalyst for ethylene polymerization or copolymerization and its applications”. The patent application number is CN202111671582.2, and the date of approval was April 3, 2026. Patent abstract: The present invention relates to a Ziegler-Natta catalyst for the polymerization or copolymerization of ethylene, characterized in that the catalyst contains titanium and vanadium, with a molar ratio of titanium to vanadium of 1–10:1. The Ziegler-Natta catalyst for the polymerization or copolymerization of ethylene is used in the homopolymerization of ethylene or the copolymerization of ethylene with other α-olefins. Compared with existing catalysts, this catalyst has the advantages of spherical-like catalyst particles, a narrow particle size distribution, less fine powder, good copolymerization performance, and high sensitivity to hydrogen regulation; it enables more effective control over the molecular weight distribution of polymers as well as the distribution of comonomers along the polymer molecular chains. Moreover, the production process is simple and the production cost is low. Since the beginning of this year, China National Petroleum Corporation has obtained 557 new patent approvals, a 58.69% increase compared to the same period last year. Based on the financial data in the company’s 2025 annual report, the company invested 23.552 billion yuan in research and development in 2025, representing a 2.34% increase compared to the previous year. According to big data analysis by Tianyancha, China National Petroleum Corporation has invested in 1,301 enterprises in total and participated in 369 bidding projects ； Regarding property-related clues, there are 111 trademark records and 49,418 patent records ； In addition, the company holds 169 administrative licenses.