A sulfur-resistant, high activity methane oxidation catalyst for use in removing methane from gas streams having a concentration of methane by oxidizing the methane. The methane oxidation catalyst is especially useful in processing gas streams that also have a concentration of a sulfur compound. The sulfur-resistant methane oxidation catalyst includes a unique multi-crystalline zirconia as a support for a platinum component and a ruthenium component. The multi-crystalline zirconia contributes to the excellent properties of the catalyst. The platinum and ruthenium components can be included in the methane oxidation catalyst in a specific weight ratio that also contributes to the enhanced properties of the catalyst. The sulfur-resistant methane oxidation catalyst may also include a chloride component that contributes to enhanced properties of the catalyst.

A polyethylene composition produced by a loop-slurry process. The process includes contacting a feedstock comprising ethylene with a solid catalyst having a particle size (D.sub.50) of about 5 to about 20 micrometers and comprising a magnesium dihalide support containing a predominantly titanium trichloride species on its crystalline lattice derived by the reaction of magnesium alcoholates with tetravalent, halogen-containing compounds and one or more aluminum alkyl or aluminum alkyl halide components at a temperature of between about 90 to about 105 C. and a residence time of between about 30 to about 60 min. The resulting polyethylene composition has a particle size (D.sub.50) of about 200 to 400 micrometers, with less than 0.05 wt. % of particles being less than 45 micrometers in diameter. A loop-slurry process and a catalyst component are also provided.

A polyethylene composition produced by a loop-slurry process. The process includes contacting a feedstock comprising ethylene with a solid catalyst having a particle size (D.sub.50) of about 5 to about 20 micrometers and comprising a magnesium dihalide support containing a predominantly titanium trichloride species on its crystalline lattice derived by the reaction of magnesium alcoholates with tetravalent, halogen-containing compounds and one or more aluminum alkyl or aluminum alkyl halide components at a temperature of between about 90 to about 105 C. and a residence time of between about 30 to about 60 min. The resulting polyethylene composition has a particle size (D.sub.50) of about 200 to 400 micrometers, with less than 0.05 wt. % of particles being less than 45 micrometers in diameter. A loop-slurry process and a catalyst component are also provided.

Process for preparing the dialdehyde of vinylcyclohexene.

Process for preparing the dialdehyde of vinylcyclohexene.