Examples of 'procatalyst' in a sentence
Meaning of "procatalyst"
procatalyst (noun) - a substance that initiates or accelerates a chemical reaction
How to use "procatalyst" in a sentence
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procatalyst
Contacting at elevated temperature to form a procatalyst precursor.
Procatalyst refers herein to said transition metal complex.
This relationship is characteristic for any given procatalyst.
The procatalyst was dried in a nitrogen flow.
The precursor can be converted to a procatalyst by procedures described below.
The procatalyst composition includes an internal electron donor.
The invention also relates to a procatalyst prepared by said process.
Procatalyst and activator solutions were handled in the glove box.
Various methods of making procatalyst compositions are known in the art.
Much research has been directed toward improvement of the procatalyst.
The resulting solid procatalyst precursor is recovered by filtration or decantation.
Iii substantially the entire amount of procatalyst is used in step a.
Activation of procatalyst by precontacting was also carried out at room temperature.
The catalyst preferably contains a transition metal compound as a procatalyst component.
Forming a suitable procatalyst composition may be accomplished in any manner.
See also
Either type of particle is useful in the production of procatalyst of desirable morphology.
The procatalyst i can be formed outside the polymerization environment or within it.
The catalyst system comprises a procatalyst component and a cocatalyst component.
A typical procatalyst compositions comprise a titanium halogenide compound on a magnesium chloride carrier.
There are still other significant advantages to in situ activation of the metallocene procatalyst.
A typical procatalyst is made up of a titanium halide compound supported on a magnesium halide.
The resulting mixture is allowed to stir overnight to complete the procatalyst aging.
Various methods of making procatalyst precursor compounds are known in the art.
The particles are useful in the production of an olefin polymerization procatalyst of desirable morphology.
The titanation of the procatalyst composition is carried out at least twice.
The cocatalyst component is fed based on calculated specified molar ratios to the procatalyst component.
Preparation of metallocene procatalyst compounds has traditionally been conducted in polar solvent systems.
This contracting treatment increases the content of tetravalent titanium in the resultant solid procatalyst component.
The material used to wash the procatalyst component is an inert hydrocarbon liquid.
Procatalyst compositions having increased resistance to shattering and generation of polymer fines are highly desired.
The invention further concerns to the use of the procatalyst in producing ethylene polymers.
Conversion of the dried procatalyst precursor to a procatalyst can be accomplished in any suitable manner.
The catalyst system according to the present invention comprises a procatalyst component and a cocatalyst component.
This olefin polymerization procatalyst precursor can be converted to a procatalyst by methods described below.
A method of making an olefin polymerization procatalyst comprising,.
The solid procatalyst component and the halogenated compound are contacted at elevated temperature.
Removing the compatible solvent from the procatalyst slurry to form the supported procatalyst.
Contacting the procatalyst precursor with a tetravalent titanium halide in the presence of an electron donor.
A method of making an olefin polymerisation procatalyst precursor comprising,.
The resulting procatalyst is then discharged and stored under inert gas prior to use.
The particles are contacted with TiCl4 to form a procatalyst.
Equally important are procatalyst compositions that produce such polymer products in high catalyst efficiency.
Rather, the precursors are used as starting materials in a subsequent conversion to an active procatalyst.
The halide is introduced into the procatalyst with either the magnesium or titanium source.
Procatalyst A was prepared according to the following procedure.
The invention at the same time aims at a procatalyst composition which yields a maximally tactic polymer.
The procatalyst composition of claim 8 comprising a benzoate.
Supported Ziegler Natta procatalyst for ethylene polymerisation.
The procatalyst may comprise the reaction product of,.
Table 3 provides the analysis of two separate samples of this procatalyst slurry.
