Study on the relationship between the structure and activities of alkyl methacrylate脙脙脙脙脙脙maleic anhydride polymers as cold flow improvers in diesel fuels

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• 作者：Song ; Yuping ; Ren ; Tianhui ; Fu ; Xisheng ; Xu ; Xiaohong
• 关键词：Alkyl methacrylate脙脙脙脙脙脙maleic anhydride copolymers ; Cold flow improver ; Solid point ; Cold flow plugging point ; Structure脙脙脙脙脙脙property relations
• 刊名：Fuel Processing Technology
• 出版年：2005
• 期刊代码：36_03783820
• 类别：ce
• 出版时间：March 25, 2005
• 卷：86
• 期：6
• 页码：641-650
• 文件大小：314 K

摘要

In order to find efficient cold flow improvers for diesel fuels derived from crude oil, copolymers (R¹MC芒芒芒MA) were prepared making use of the copolymerization of methacrylate (R¹MC) of various alkyls with maleic anhydride (MA), and terpolymers (R¹MC芒芒芒MA芒芒芒R²MC) were prepared by the reaction of long-chain alkyl methacrylate (R¹MC), maleic anhydride (MA), and short alkyl methacrylate (R²MC). The additives were purified and characterized by IR, ¹H芒芒芒NMR, and GPC. The activities of the synthetic products as the cold flow improvers in two diesel fuels were investigated. The results indicate that: (1) the alkyl chain length of R¹ in R¹MC芒芒芒MA copolymers significantly affects the solid point depressing performance. When the long-chain alkyl R¹ is n芒芒芒C₁₄H₂₉芒芒芒 and the reaction material molar ratio (R¹MC/MA) is 1:2, the C₁₄MC芒芒芒2MA possesses the best 芒芒SP property; (2) the (C₁₄MC芒芒芒MA芒芒芒R²MC) terpolymers all demonstrate excellent solid point depression properties when the short-chain alkyl R² varies from CH₃芒芒芒 to n芒芒芒C₈H₁₇芒芒芒; (3) however, all of the tested copolymers and terpolymers do not demonstrate necessary cold filter plugging point depression performance.