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 loading non-metallocene single active central catalyst composition which is obtained through adopting an alkyl aluminoxane / magnesium chloride / silica gel carrier as a carrier and loading a non-metallocene single active central transition metal composition and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. 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 supported metallocene catalyst using magnesium chloride as a carrier. The method comprises: (1) preparation of a magnesium chloride carrier, (2) preparation of a magnesium chloride carrier of an alkyl aluminoxane, (3) magnesium chloride loading The preparation of the metallocene catalyst; wherein the preparation of the magnesium chloride carrier adopts the spraying method using tetrahydrofuran as a solvent. The preparation of the magnesium chloride carrier used in the method is simple, and the obtained supported catalyst particle has good shape and adjustable size. The supported metallocene catalyst obtained by the method catalyzes the copolymerization reaction of ethylene and higher α-olefins, has high copolymerization activity and the obtained resin powder has good particle shape and high packing density, and can be applied to slurry method and gas phase polymerization process .

The invention relates to a supported monometallocene catalyst for ethylene polymerization and a preparation method thereof, the catalyst comprising (a) a monometallocene compound; (b) a chlorinated hydrocarbyl silicon modifier; (c) a modified hydrocarbyl magnesium halide (d) alkyl aluminoxane; (e) reaction product of silica gel carrier; its preparation method includes: (1) preparation of chlorinated hydrocarbyl silicon modified silica gel carrier, (2) halogenated hydrocarbyl magnesium modified silica gel carrier (3) preparation of modified silica gel carrier of alkyl aluminoxane, (4) preparation of silica gel-supported single metallocene catalyst, the obtained single metallocene catalyst catalyzes ethylene polymerization or copolymerization with high polymerization activity . The preparation method of the silica gel carrier used in the method is simple, and the obtained loaded catalyst particle has good shape and adjustable size.

The present invention discloses a supported metallocene catalyst for ethylene polymerization, wherein the catalyst comprises the reaction product of the following components: (1) a metallocene compound, (2) chlorinated hydrocarbonyl silicon, (3) alkyl aluminum, (4) a borate compound, and (5) a magnesium chloride carrier. According to the present invention, the catalyst presents the high activity when the catalyst is used for the ethylene polymerization; and the bulk density of the polymer powder material is high.

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

The invention relates to a magnesium chloride / silicon dioxide / tetrahydrofuran loaded late transition metal catalyst and a preparation method and application thereof. The preparation method comprises the following steps of: performing reaction between magnesium chloride and a late transition metal complex in an electron donor tetrahydrofuran compound to prepare a matrix; doping the obtained matrix with nanoscale carbon dioxide carrier particles to obtain a suspended liquid; spray drying the obtained suspended liquid to obtain a solid catalyst compound, wherein the molar ratio of magnesium chloride / silicon dioxide / tetrahydrofuran is 0.1-1:0.1-2:5-20, and the weight percentage of central metal M is 0.01-5% in the loaded late transition metal catalyst. The catalyst used for catalyzing copolymerization reaction between ethylene and advanced alpha-olefin is high in copolymerization activity, and obtained resin powder has good particular shape, is high in stacking density, and can be applied to slurry polymerization or vapor phase polymerization process of ethylene.

The invention discloses a supported non-metallocene catalyst for ethylene polymerization and a preparation method. The catalyst comprises (a) a non-metallocene compound; (b) chlorinated hydrocarbyl silicon; (c) alkylaluminoxane (d ) reaction product of silica gel carrier; its preparation method includes: (1) preparation of chlorinated hydrocarbyl silicon modified silica gel carrier (2) preparation of alkyl aluminoxane modified silica gel carrier (3) modified silica gel supported non-metallocene catalyst The obtained non-metallocene catalyst catalyzes ethylene polymerization or copolymerization and has high polymerization activity. The preparation method of the silica gel carrier used is simple, and the obtained loaded catalyst particle has good shape and adjustable size.

The invention relates to a supported late transition metal catalyst for ethylene polymerization, and a preparation method thereof, the catalyst comprising (a) a late transition metal compound; (b) hydrocarbyl silicon chloride; (c) an organoaluminum compound; (d) magnesium chloride A reaction product of a carrier; the preparation method thereof comprises: (1) preparation of a chlorinated hydrocarbyl silicon-modified magnesium chloride carrier, (2) preparation of an organoaluminum-modified magnesium chloride carrier, (3) preparation of a transition metal catalyst supported by magnesium chloride, and the obtained The late transition metal catalysts catalyzed ethylene polymerization or copolymerization have 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 supported catalyst obtained by the method catalyzes the copolymerization reaction of ethylene and α-olefin, has high polymerization activity, and the obtained resin powder has good particle shape and high bulk density, and is applicable to slurry method and gas phase method polymerization technology.

The present invention discloses a supported metallocene catalyst for ethylene polymerization, wherein the catalyst comprises the reaction product of the following components: (1) a metallocene compound, (2) chlorinated hydrocarbonyl silicon, (3) alkyl aluminum, (4) a borate compound, and (5) a silica gel carrier. According to the present invention, the catalyst presents the high activity when the catalyst is used for the ethylene polymerization; and the bulk density of the polymer powder material is high.

The present invention relates to a supported mono-metallocene catalyst for ethylene polymerization, and a preparation method thereof. The catalyst comprises (a) a mono-metallocene compound; (b) a chlorinated hydrocarbyl silicon modifier; (c) an alkylaluminum oxide alkane; (d) reaction product of silica gel carrier; its preparation method includes: (1) preparation of chlorinated hydrocarbyl silicon modified silica gel carrier, (2) preparation of alkyl aluminoxane modified silica gel carrier, (3) modification The preparation of silica gel supported single metallocene catalyst, the obtained single metallocene catalyst catalyzes ethylene polymerization or copolymerization and has high polymerization activity. The preparation method of the silica gel carrier used is simple, and the obtained loaded catalyst particle has good shape and adjustable size.

The invention relates to a supported non-metallocene catalyst for ethylene polymerization and a preparation method thereof. The catalyst includes (a) non-metallocene compound; (b) chlorinated hydrocarbyl silicon; (c) halogenated hydrocarbyl magnesium; (d) alkyl aluminoxane; (e) reaction product of silica gel carrier; its preparation method includes: ( 1) Preparation of chlorinated hydrocarbyl silicon modified silica gel carrier, (2) preparation of halogenated hydrocarbyl magnesium modified silica gel carrier, (3) preparation of alkyl aluminoxane modified silica gel carrier, (4) silica gel supported non-metallocene The catalyst is prepared, and the obtained non-metallocene catalyst catalyzes ethylene polymerization or copolymerization and has high polymerization activity. The preparation method of the silica gel carrier used in the method is simple, and the obtained loaded catalyst particle has good shape and adjustable size.