Examples of 'metallocene compound' in a sentence
Meaning of "metallocene compound"
metallocene compound: a type of chemical compound that contains a metal atom sandwiched between two cyclopentadienyl anions, often used as catalysts in polymerization reactions
How to use "metallocene compound" in a sentence
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metallocene compound
The metallocene compound or catalyst precursor is stereorigid.
The metal complex is a metallocene compound.
The metallocene compound or the aluminoxane is supported on a carrier material.
The polymerization yields depend on the purity of the metallocene compound.
The preactivation of the metallocene compound is preferably carried out in solution.
The catalyst composition comprises contact product of a hybrid metallocene compound and an activator.
Various components of the metallocene compound are discussed below in more detail.
A metallocene compound refers to a transition metal complex having coordinated cyclopentadienyl ligands.
The alumoxane complexes with the metallocene compound to form the catalyst.
The metallocene compound can be supported using its solutions in hydrocarbon solvents.
The polymerization yields depend on the purity of the metallocene compound of the catalyst.
The new dysprosium metallocene compound is the culmination of several years of research.
The polymerization yield depends on the purity of the metallocene compound of the catalyst.
The slurry of the supported metallocene compound is then contacted with the activator solution.
The other cocatalysts mentioned are used in approximately equimolar amounts to the metallocene compound.
See also
The compound is a bridged metallocene compound having dissimilar cyclopentadienyl groups and no bilateral symmetry.
The metallocene catalyst of the invention is a bulky ligand transition metal metallocene compound.
A catalyst system using the metallocene compound disclosed above can be formed with a cocatalyst.
The cocatalyst can also be supported first and subsequently reacted with the metallocene compound.
A metallocene compound suitable for use in the present disclosure may display a positive hydrogen response.
The bridge if present increase the stereorigidity of the metallocene compound and resulting catalyst.
A metallocene compound of the formula VI where.
After said contacting recovering particles of support impregnated with alumoxane and the metallocene compound.
In the above formula of the metallocene compound the preferred transition metal atom M is zirconium.
The catalyst used in the process of the present invention preferably comprises one metallocene compound.
METALLOCENE COMPOUNDS The present invention employs a bridged metallocene compound having both a cyclopentadienyl and a fluorenyl moiety.
The second catalyst component can comprise a single atom bridged metallocene compound with a fluorenyl group.
The unbridged metallocene compound is, or a combination therof.
CATALYST COMPOSITIONS The present invention employs catalyst compositions containing a bridged metallocene compound.
The unbridged metallocene compound is, or a combination thereof.
Process for the preparation of a bridged metallocene compound in which,.
The first metallocene compound has the formula,.
Borated beads were typically treated with 3 equivalents of metallocene compound.
A metallocene compound represents by any of the following structures,.
The process of claim 1 wherein the metallocene compound is a zirconocene.
The metallocene compound has the following formula,.
Generally, the components of a metallocene catalyst are a metallocene compound and an ionizing agent.
The metallocene compound is pre-activated with an alkyl alumoxane.
The invention relates to a process for the preparation of a bridged metallocene compound in which,.
The metallocene compound comprises a metallocene compound of titanium, zirconium, or hafnium.
In a particular preferred embodiment, at least one transition metal-containing catalyst is a metallocene compound.
The second metallocene compound is an ansa-metallocene having the following formula,.
In a particularly preferred embodiment the bulky ligand metallocene compound is represented by the formula,.
The first metallocene compound is an ansa-metallocene having the following formula,.
The magnesium chloride is ground before being contacted with the pre-reacted metallocene compound.
In general, at least one metallocene compound is employed in the formation of the catalyst.
Additionally, anchoring is achieved by a chemical reaction between the ligand of a metallocene compound and a support.
The metallocene compound may comprise a metallocene compound of titanium, zirconium, and hafnium.
In still another aspect, the second metallocene compound can have the following formula,.
The metallocene compound recovered is reported as being substantially free of alkali metal salt by-product.
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