35results about How to "High catalytic activity for ethylene polymerization" patented technology

The invention discloses a loading metallocene catalyst composition which is obtained through adopting an alkyl aluminoxane/magnesium chloride/silica gel carrier as a carrier and loading a metallocene catalyst precursor, and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. Compared with a common loading metallocene catalyst with an alkyl aluminoxane/silica gel carrier, the activity can be doubled or more. The carrier is simple to prepare; the prepared loading catalyst granule has good shape and adjustable size; and the obtained polythene powdery material has high stacking density.

The invention discloses a method for preparing a loaded late transition metal catalyst by taking magnesium chloride as a carrier, which comprises the following steps of: (1), preparation of a magnesium chloride carrier; (2), preparation of a magnesium chloride carrier of alkyl aluminoxane; and (3), preparation of a magnesium chloride loaded late transition metal catalyst, wherein the magnesium chloride carrier is prepared by adopting a spraying method in which tetrahydrofuran is taken as a solvent. The obtained loaded late transition metal catalyst catalyzes ethylene homopolymerization or copolymerization with high polymerization activity. In the method, the preparation of the magnesium chloride carrier is simple; and the obtained loaded catalyst granule has good shape and adjustable size.

The invention relates to a supported late-transition-metal catalyst used for ethylene polymerization and a preparation method thereof. The catalyst comprises a late-transition-metal compound, chlorinated alkyl silicon, an organo aluminium compound and a magnesium chloride carrier reaction product; the preparation method comprises the following steps: 1) preparation of a chlorinated alkyl silicon modified silica gel carrier, 2)preparation of an organo-aluminium modified magnesium chloride carrier, and 3)preparation of the magnesium chloride supported late-transition-metal catalyst; and the obtained late-transition-metal catalyst has high polymerization activity for catalyzing vinyl polymerization or copolymerization. The preparation method of the magnesium chloride carrier is simple, and the obtained supported catalyst particles have good morphology and have adjustable size. The obtained supported late-transition-metal catalyst is capable of catalyzing copolymerization of ethylene and alpha-alkene, the copolymerization activity is high, the obtained resin powder has good particle morphology, bulk density is high, and the late-transition-metal catalyst is suitable for the polymerization technology of a slurry method and a gas phase method.

The invention relates to a supported transition-metal catalyst used for ethylene polymerization and a preparation method thereof. The catalyst comprises a post-transition metallic compound, a chlorinated alkyl silicon modifier, halogenated alkyl magnesium, an organo aluminium compound and a silica gel carrier reaction product; the preparation method comprises the following steps: 1) preparation of a chlorinated alkyl silicon modified silica gel carrier, 2)preparation of a halogenated alkyl magnesium modified silica gel carrier, 3)preparation of an organo-aluminium modified silica gel carrier, and 4)preparation of the silica gel supported transition-metal catalyst; and the obtained post-transition-metal catalyst has high polymerization activity for catalyzing vinyl polymerization or copolymerization. The preparation method of the silica gel carrier is simple, and the obtained supported catalyst particles have good particle morphology and have adjustable size.

The invention discloses a supported metallocene catalyst used for vinyl polymerization and a preparation method thereof. The catalyst comprises a metallocene compound, chlorinated alkyl silicon, halogenated alkyl magnesium, alkyl aluminoxane and a silica gel carrier reaction product; the preparation method comprises the following steps: 1) preparation of a chlorinated alkyl silicon modified silica gel carrier, 2) preparation of a halogenated alkyl magnesium modified silica gel carrier, 3)preparation of an alkyl aluminoxane modified silica gel carrier, and 4)preparation of the silica gel supported metallocene catalyst; and the obtained metallocene catalyst has high polymerization activity for catalyzing vinyl polymerization or copolymerization. The preparation method of the silica gel carrier is simple, and the obtained supported catalyst particles have good particle morphology and have adjustable size.

The invention relates to a supported non-metallocene catalyst used for ethylene polymerization and a preparation method thereof. The catalyst comprises a non-metallocene compound, chlorinated alkyl silicon, halogenated alkyl magnesium, alkyl aluminoxane and a silica gel carrier reaction product; the preparation method comprises the following steps: 1) preparation of a chlorinated hydroxyl silicon modified silica gel carrier, 2)preparation of a halogenated alkyl magnesium modified silica gel carrier, 3)preparation of an alkyl aluminoxane modified silica gel carrier, and 4)preparation of the silica gel supported non-metallocene catalyst; and the obtained non-metallocene catalyst has high polymerization activity for catalyzing vinyl polymerization or copolymerization. The preparation method of the silica gel carrier is simple, and the obtained supported catalyst particles have good morphology and have adjustable size.

The invention relates to a supported non-metallocene catalyst used for ethylene polymerization and a preparation method thereof. The catalyst comprises a non-metallocene compound, chlorinated alkyl silicon, alkyl aluminoxane and a silica gel carrier reaction product; the preparation method comprises the following steps: 1) preparation of a chlorinated alkyl silicon modified silica gel carrier, 2)preparation of an alkyl aluminoxane modified silica gel carrier, and 3)preparation of the modified silica gel supported non-metallocene catalyst; and the obtained non-metallocene catalyst has high polymerization activity for catalyzing vinyl polymerization or copolymerization. The preparation method of the silica gel carrier is simple, and the obtained supported catalyst particles have good particle morphology and have adjustable size.

The invention discloses a supported metallocene catalyst used for vinyl polymerization and a preparation method thereof. The catalyst comprises a metallocene compound, a chlorinated alkyl silicon modifier, alkyl aluminoxane and a silica gel carrier reaction product; the preparation method comprises the following steps: 1) preparation of a chlorinated alkyl silicon modified silica gel carrier, 2) preparation of an alkyl aluminoxane modified silica gel carrier, and 3)preparation of the modified silica gel supported metallocene catalyst; and the obtained metallocene catalyst has high polymerization activity for catalyzing vinyl polymerization or copolymerization. The preparation method of the silica gel carrier is simple, and the obtained supported catalyst particles have good morphology and have adjustable size.

The invention discloses a method for preparing a loaded non-metallocene single active site catalyst by taking magnesium chloride as a carrier, which comprises the following steps of: (1), preparation of a magnesium chloride carrier; (2), preparation of a magnesium chloride carrier of alkyl aluminoxane; and (3), preparation of a magnesium chloride loaded non-metallocene single active site catalyst, wherein the magnesium chloride carrier is prepared by adopting a spraying method in which tetrahydrofuran is taken as a solvent. The obtained loaded non-metallocene single active site catalyst catalyzes ethylene polymerization or copolymerization with high polymerization activity. In the method, the preparation of the magnesium chloride carrier is simple; and the obtained loaded catalyst granule has good shape and adjustable size.

The invention relates to a supported metallocene catalyst for ethylene polymerization and a preparation method thereof. The catalyst includes (a) a metallocene compound; (b) a chlorinated hydrocarbyl silicon modifier; (c) an alkyl aluminoxane; (d) a reaction product of a magnesium chloride carrier; its preparation method includes: (1) a chlorinated hydrocarbyl Preparation of silicon-modified magnesium chloride carrier, (2) preparation of alkylaluminoxane-modified magnesium chloride carrier, (3) preparation of magnesium chloride-supported metallocene catalyst, the obtained metallocene catalyst catalyzes ethylene homopolymerization or copolymerization with high polymerization activity. The preparation method of the magnesium chloride carrier used is simple, and the obtained loaded catalyst particle has good shape and adjustable size. The obtained supported metallocene catalyst catalyzes the copolymerization reaction of ethylene and α-olefin, has high copolymerization activity and the obtained resin powder has good particle shape and high bulk density, and can be applied to slurry method and gas phase method polymerization technology.