E.i. Dupont De Nemours and Company

The Johns Hopkins University

University of Wyoming-office of Research & Economic Development

William Howard Tuminello

Robert John Cavanaugh

Richard A Morgan

Lin Wang

Joel David Citron

Mark Elliot Wagman

Patricia Metzger Cotts

Gregory T Dee

Robert Clayton Wheland

Charles W Stewart, Sr

Shoibal Banerjee

George R Chapman, Jr

Stephen A Perusich

John G Van Alsten

Mark A McHugh

Andrew Edward Feiring

Hyunkook Shin

Douglas Robert Anton

Jack R Kirchner

Donnan E Priester

Vijay K Sethi

Randall Allen Vogel

Robert E Tarney

Rita S McMinn

Lewis E Crenshaw

Cynthia Asli Mertdogan

Andrew J Lucero

At least one embodiment of the inventive technology focuses on a new composition that comprises hexagonally close packed molybdenum carbide crystals, in addition to metallic nickel crystals and/or sodium, and having use as a catalyst in a Fischer-Tropsch process to produce alcohol. At least one embodiment of a related aspect of the inventive technology is a Fischer-Tropsch reaction to produce alcohols from carbon monoxide and hydrogen using the aforementioned composition to catalyze reactions producing higher alcohols.

Process and catalyst for production of mixed alcohols from synthesis gas

This invention relates to the application of fluorinated urethane compositions to stone in order to protect the stone from the deleterious effects of water and pollution.

Method for protection of stone with fluorinated urethane

This invention concerns the application of substantially amorphous fluoropolymer compositions to stone so as to protect the stone from the deleterious effects of water and pollution.

Method for protection of stone with substantially amorphous fluoropolymers

Polyethylenes made from ethylene and a series of &agr;-olefins using a catalyst that copolymerizes ethylene and &agr;-olefins usually have excellent melt processing characteristics, especially in uses where high zero shear viscosity and low high shear viscosity are desirable. These polyethylenes are preferably made by forming the &agr;-olefins in situ from ethylene during the polymerization process. The polyethylenes are especially useful in blow molding, extrusion or extruded blown film processes.

Processing polyethylenes

Polyolefins made preferably only from ethylene using a selected ethylene oligomerization catalyst to form &agr;-olefins and a polymerization catalyst which can copolymerize ethylene and &agr;-olefins produces a novel polymer which advantageous rheological properties.

Polymerization of olefins

A flash-spun material comprised of at least 90% by weight of polymers selected from the groups A, B, and C; wherein group A comprises polymers with a melting point above 280&deg; C. that are comprised of halocarbon polymers in which at least 20% of the total number of halogen atoms in each halocarbon polymer are fluorine atoms; wherein group B comprises polymers with a melting point above 280&deg; C. that are comprised of oxyhalocarbon polymers in which at least 20% of the total number of halogen atoms in each oxyhalocarbon polymer are fluorine atoms; and wherein group C comprises fully halogenated, highly fluorinated ion exchange polymers. A process for producing such flash-spun material and a solvent for producing such flash-spun material are also provided.

Fibers flash-spun from fully halogenated polymers

Fluoropolymers containing a specified ratio of hydrogen to fluorine atoms attached to polymer backbone atoms dissolve in carbon dioxide under relatively mild conditions of temperature and pressure. The resulting solutions may be used for coatings or encapsulation.

Solutions of fluoropolymers in carbon dioxide

Perfluorinated polymers are dissolved in supercritical carbon dioxide and/or sulfur hexafluoride at elevated temperatures and pressures. The solutions are useful for making foams, spun-bonded or paper-like webs, or for purification of polymers.

Solutions of perfluorinated polymers in SF.sub.6 with or without CO.sub.2

Perfluorinated cycloalkane solvents for dissolving high melting polymers containing tetrafluoroethylene, are disclosed. These solvents dissolve such polymers more rapidly, and/or are more stable, than previously known solvents. Also disclosed is a process for dissolution of the polymers and their resulting solutions. The solutions are useful for making polymer films, coatings and for encapsulating objects.

Method for forming solution cast tetrafluoroethylene polymer films

Solvents for tetrafluoroethylene polymers

Copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) having high HFP content and end-of-melting temperature, T.sub.m (end), as low as 200.degree. C. are disclosed. Exceptional performance as a processing aid in polyolefins results from having T.sub.m (end) of the TFE/HFP copolymer close to the processing temperature of the polyolefin. These TFE/HFP copolymers are soluble in fluorinated cyclic solvents. Copolymer/solvent systems copolymer at significant concentrations in selected solvents are fluid and stable at room temperature.

Low melting tetrafluoroethylene copolymer and its uses

High melting point perfluorinated tetrafluoroethylene polymers dissolved in supercritical carbon dioxide at elevated temperatures and high pressures. The solutions are useful for making foams, spun-bonded or paper-like webs, or for purification of polymers.

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Newark, DE, United States of America

William Howard Tuminello