Abstract:
A polyolefin nanocomposite composition having from one to twenty weight percent of a platy cation exchanging layered silicate material (such as magadiite), from one to twenty weight percent of a fibrous cation exchanging layered silicate material (such as sepiolite) and from ninety eight to sixty weight percent of a polyolefin polymer matrix (such as polypropylene), the platy cation exchanging layered silicate material and the fibrous cation exchanging layered silicate material being dispersed in the polyolefin polymer matrix. .The use ofboth the platy and the fibrous cation exchanging layered silicate material results in a synergistic improvement of the physical properties of the composition. The composition can be made by melt blending the polymer with the platy and fibrous material. Alternatively, the composition can be made by polymerizing the polymber with a metallocene polymerization catalyst treated dispersion of an acid treated platy and fibrous material in a solvent so that the olefin polymerizes to form the composition.
Abstract:
A method for producing a nanocomposite polymer that includes the step of adding an olefin to a metallocene polymerization catalyst treated dispersion of an acid treated cation exchanging layered silicate material in a solvent so that the olefin polymerizes to form the nanocomposite polymer. An exfoliated acid treated cation exchanging layered silicate material dispersed in a polymer matrix, wherein more than about fifty percent of the acid treated cation exchanging layered silicate material is found by electron microscopy to have five or fewer layers. A metallocene polymerization catalyst treated, acid treated cation exchanging layered silicate material.
Abstract:
The invention relates to silica gel compositions containing acidified cation exchanging layered silicate materials and methods for preparing such compositions. These silica gel compositions can be contacted with metallocene polymerization catalysts to produce a catalyst composition.
Abstract:
Various processes and apparatus are discussed for an ultra-high heat flux chemical reactor. A thermal receiver and the reactor tubes are aligned to 1 ) absorb and re-emit radiant energy, 2) highly reflect radiant energy, and 3) any combination of these, to maintain an operational temperature of the enclosed ultra-high heat flux chemical reactor. Particles of biomass are gasified in the presence of a steam carrier gas and methane in a simultaneous steam reformation and steam biomass gasification reaction to produce reaction products that include hydrogen and carbon monoxide gas using the ultra-high heat flux thermal energy radiated from the inner wall and then into the multiple reactor tubes. The multiple reactor tubes and cavity walls of the receiver transfer energy primarily by radiation absorption and re-radiation, rather than by convection or conduction, to the reactants in the chemical reaction to drive the endothermic chemical reaction flowing in the reactor tubes.