Bis(trifluoromethylsulfonyl)phenylamines as Internal Donors for Ziegler-Natta Polymerization Catalysts

Several bis（trifluoromethylsulfonyl）phenylamines have been synthesized and used as internal donors for the preparation of heterogeneous Ziegler-Natta catalysts for propylene polymerization. These new cata- lysts are highly active and stereospecific in combination with an external donor for the polymerization of propylene. The activity of these catalysts is dramatically influenced by the electronic capability of the phenyl substituents on the sulfonyl phenylamines. Therefore, the performances of the catalysts can be modified by adjusting the electronic property of the phenyl substituents of the sulfonyl phenylamines.

潜活性降粘冷采技术在高一区的试验应用

高一区经过多年开发后，地层压力下降迅速，储层原油物性较开发初期发生较大变化，原油粘度上升，胶质沥青质含量上升，原油在地层中流动性变差，导致二次开发效果不佳。潜活性降粘冷采技术主要利用石油中间体的排泥功能及冷采剂的降粘作用，综合作用于产出液，降低原油粘度，改善原油在地层中的流动性，以便更好地进行二次开发。