The Synthesis And Property Test Of Drag Reducing Agent In Transportation Pipeline Of Oil

High molecular weight polymers as drag reducing agents have been widely used in conduits during the transportation of crude oi I. In this paper, non-crystalline ultra high molecular weight drag reducers were synthesized with olefins and transitional metal catalysts by polymerization in solvent and free-solvent. Some factors affecting the molecular weight or the intrinsic viscosity( μ ) of polymers were discussed : Including the polymerization method, polymerization temperature, the type and concentration of catalysts, polymerization time, impurity contents in material etc. Finai4y, the preferred condition of polymerization are obtained: polymerization in solvent, temperature 0-30℃, normal pressure, 0.79:1(g/g), C7-C11olefins, a drag reducing efficiency of 40.5% could be achieved by adding 10ppm of polymer to diesel fuels; bulk polymerization, temperature 0-30℃, normal pressure, 1.84:1(g/g), C7-C11 olefins, a drag reducing efficiency of 40.1% could be achieved by adding lOppm of polymer to diesel fuels.The properties of polymer, such as compose, structure, heat stability, crystality and etc, were studied by net/sen thermal , infrared spectroscopy , nuclear magnetic resonance, XRD spectrum and so on. The result were show that the synthesis and test dales of the polymer was the same as the type of product, and that it had high non-crystality and stability in high temperature(0℃-250℃).Through experiments, some discovers were obtained: Solvent polymerization and bulk polymerization could synthesize the polymer with high drag reducing efficiency under the prel'erred condition. But some inconvenience and high investment were broughtabout by coping with solvent when Solvent polymerization were used, so the bulk polymerisation were used in industry...