Abstract: This invention provides oxide matrix compositions that can be utilized in catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. The oxide matrix composition comprises residual mineral components and an oxide precursor. The catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and an oxide matrix composition. Processes for producing the oxide matrix composition and the catalyst composition are also provided.

Abstract: A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in combination with at least one metal alkyl selected from the group consisting of alkyl zinc compounds, alkyl aluminum compounds, alkyl boron compounds, and mixtures thereof and iii) mixtures thereof can be used to polymerize olefins to produce a low density polymer with a decreased melt index and/or high load melt index. This catalyst system also can be used with a Ziegler-Natta catalyst system to polymerize olefins. Polymerization processes using these catalyst system compositions are also provided.

Abstract: A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in combination with at least one metal alkyl selected from the group consisting of alkyl zinc compounds, alkyl aluminum compounds, alkyl boron compounds, and mixtures thereof and iii) mixtures thereof can be used to polymerize olefins to produce a low density polymer with a decreased melt index and/or high load melt index. This catalyst system also can be used with a Ziegler-Natta catalyst system to polymerize olefins. Polymerization processes using these catalyst system compositions are also provided.

Abstract: This invention provides oxide matrix compositions that can be utilized in catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. The oxide matrix composition comprises residual mineral components and an oxide precursor. The catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and an oxide matrix composition. Processes for producing the oxide matrix composition and the catalyst composition are also provided.

Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.

Abstract: A novel magnesium treated silica-containing compound that is useful as a support for chromium based olefin polymerization catalyst systems is provided which produces ethylene polymers having with MWD's that promote good properties particularly in HMW film applications.

Abstract: This invention provides oxide matrix compositions that can be utilized in catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer. The oxide matrix composition comprises residual mineral components and an oxide precursor. The catalyst composition comprises contacting an organometal compound, an organoaluminum compound, and an oxide matrix composition. Processes for producing the oxide matrix composition and the catalyst composition are also provided.

Abstract: A novel magnesium treated silica-containing compound that is useful as a support for chromium based olefin polymerization catalyst systems is provided which produces ethylene polymers having with MWD's that promote good properties particularly in HMW film applications.

Abstract: A process for preparing pillared chromium phyllosilicate clay &agr;-olefin catalysts is disclosed. This process utilizes palygorskite and sepiolite clays. The pillaring of said clays comprises the steps of: (a) preparing a hydrolyzed first solution by dissolving a chromium salt and a base in water, heating said first solution to a temperature in the range of about 20° C. to about 100° C. while stirring continuously until the solution reaches a pH in the range of about 1.5 to about 2.5 and thereby producing a master batch; (b) diluting said master batch with water to produce a diluted second solution and heating said diluted second solution to produce a heated second solution; (c) adding a solid clay selected from the group consisting of sepiolites and palagorskites to said heated second solution, and continuing heating; (d) recovering said pillared chain silicate clay; and (e) drying said pillared chain silicate clay to form first product.

Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.

Abstract: A novel magnesium treated silica-containing compound that is useful as a support for chromium based olefin polymerization catalyst systems is provided which produces ethylene polymers having with MWD's that promote good properties particularly in HMW film applications.

Abstract: A process for preparing pillared chromium phyllosilicate clay &agr;-olefin catalysts is disclosed This process utilizes palygorskite and sepiolite clays. The pillaring of said clays comprise the steps of: (a) preparing a hydrolyzed first solution by dissolving a chromium salt and a base in water, heating said first solution to a temperature in the range of about 20° C. to about 100° C. while stirring continuously until the solution reaches a pH in the range of about 1.5 to about 2.

Abstract: A process for preparing pillared chromium phyllosilicate clay &agr;-olefin catalysts is disclosed. This process utilizes palygorskite and sepiolite clays. The pillaring of said clays comprise the steps of: (a) preparing a hydrolyzed first solution by dissolving a chromium salt and a base in water, heating said first solution to a temperature in the range of about 20° C. to about 100° C. while stirring continuously until the solution reaches a pH in the range of about 1.5 to about 2.5 and thereby producing a master batch; (b) diluting said master batch with water to produce a diluted second solution and heating said diluted second solution to produce a heated second solution; (c) adding a solid clay selected from the group consisting of sepiolites and palagorskites to said heated second solution, and continuing heating; (d) recovering said pillared chain silicate clay; (e) drying said pillared chain silicate clay to form first product.

Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.

Abstract: A process is provided comprising copolymerizing, under copolymerizing conditions, ethylene with one or more alpha-olefins, using a catalyst system, where said catalyst system has been sized, to produce a lower-density-copolymer, where said lower-density-copolymer has a density lower than a similar copolymer produced by copolymerizing, under said copolymerizing conditions, ethylene with said one or more alpha-olefins, using said catalyst system, where said catalyst system has not been sized, where said catalyst system that has been sized has had substantially all particles removed that produce, under said copolymerizing conditions, a higher-density-copolymer, where said higher-density-copolymer has a density higher than said similar copolymer.

Abstract: A process for polymerizing olefins with a catalyst system which comprises contacting a ribbon-like clay selected from the group consisting of sepiolites with a chromium solution. Preparation of said chromium solution comprises the steps offa) dissolving a chromium salt and a base in water by heating solution at a temperature in the range of about 20.degree. C. to about 100.degree. C. thereby producing a first chromium solution having a pH in the range of about 1.5 to 2.5;b) diluting said first chromium solution with water so as to produce a second chromium solution wherein first chromium solution is diluted such that the ratio of added water to first chromium solution is in the range of about 5 ml H.sub.2 O to about 10 mls H.sub.2 O to per ml first solution, and thereafter heating said second chromium solution at a temperature in the range of about 60.degree. C. to about 95.degree. C. for a time period in the range of about 60 to about 180 minutes.

Abstract: A process for preparing pillared chromium ribbon-like silicate clay .alpha.-olefin catalysts is disclosed which comprises contacting a ribbon-like clay selected from the group consisting of sepiolites with a chromium solution. Preparation of said chromium solution comprises the steps of:a) dissolving a chromium salt and a base in water by heating solution at a temperature in the range of about 20.degree. C. to about 100.degree. C. thereby producing a first chromium solution having a pH in the range of about 1.5 to 2.5;b) diluting said first chromium solution with water so as to produce a second chromium solution wherein first chromium solution is diluted such that the ratio of added water to first chromium solution is in the range of about 5 ml H.sub.2 O to about 10 mls H.sub.2 O to per ml first solution, and thereafter heating said second chromium solution at a temperature in the range of about 60.degree. C. to about 95.degree. C.

Abstract: A composition of matter is provided comprising a catalytic mixture resulting from contacting at least one of each of the following compounds, an pyridine compound, a clay compound, and an organo-nickel compound. Additionally, a process is provided comprising contacting, under polymerization conditions, at least one alpha-olefin, with a catalytic mixture resulting from contacting at least one of each of the following compounds, an pyridine compound, a clay compound, and an organo-nickel compound.

Abstract: An ethylene polymerization catalyst system is provided. This catalyst system is produced by the process comprising forming an activated and reduced composition that is substantially free of titania and that comprises a fluorine compound, a chromium compound, and a catalyst support that consists essentially of silica.An ethylene polymerization process is provided. This process uses the ethylene polymerization catalyst system above. This catalyst system is contacted with ethylene, in the presence of hydrogen and trialkylaluminum, under polymerization conditions, to produce a polyethylene resin.

Abstract: A composition of matter is provided comprising a catalytic mixture resulting from contacting at least one of each of the following compounds, an pyridine compound, a clay compound, and an organo-nickel compound. Additionally, a process is provided comprising contacting, under polymerization conditions, at least one alpha-olefin, wih a catalytic mixture resulting from contacting at least one of each of the following compounds, an pyridine compound, a clay compound, and an organo-nickel compound.