Examples of 'internal electron' in a sentence
Meaning of "internal electron"
internal electron: In physics, it refers to an electron that is part of an atom or a material, as opposed to an external or free electron. Used in scientific contexts discussing atomic structure or electron behavior
How to use "internal electron" in a sentence
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internal electron
Also mixtures of internal electron donors can be used.
Internal electron donor supportation on the prepolymerized catalyst.
This process uses an phthalate as internal electron donor.
The internal electron donors may be used individually or in combination.
The procatalyst composition includes an internal electron donor.
Preferably an internal electron donor is also present during step c.
Preferably dibutyl phthalate is used as the internal electron donor.
The internal electron donor compounds may be used individually or in combination.
Dialkyl phthalate esters are particularly effective as internal electron donors.
The internal electron donor is an important component in a propylene polymerization catalyst.
Such catalysts in general also contain internal electron donors.
Preferred internal electron donor compounds include esters of aromatic acids.
The solid catalyst component usually comprises also an internal electron.
Also in this case the use of an internal electron donor compound is preferred.
The internal electron donor coordinates to another part of the coordination sites.
See also
The corresponding ethers and esters acting as internal electron donors.
The internal electron donors referenced in the procedure are typically a Lewis base.
The solid titanium catalyst component may also comprises an internal electron donor.
In an embodiment, the internal electron donor is a phenylene dibenzoate.
There may be chemical reactions between the alcohol and the internal electron donor.
A particularly preferable internal electron donor is di-isodecyl phthalate.
The external donor may be the same or different from the internal electron donor used.
In an embodiment, the internal electron donor is a bidentate compound.
A solid magnesium supported titanium catalyst component including an internal electron donor ;.
Process according claim 16 in which the internal electron donor compound is diisobutylphthalate.
In co-ordination polymerization chemistry these esters are often characterized as internal electron donors.
The internal electron donor can be added during the treatment with TiCl4.
The temperature of the suspension is risen, and an internal electron donor is added.
In these methods, an internal electron donor can be desirably present in the reaction system.
The procatalyst has magnesium, titanium, halide and an internal electron donor as essential components.
In this process, the internal electron donor of the present disclosure is added for reaction.
A solid catalyst component comprising a magnesium halide, a titanium halide and an internal electron donor ; and.
Such catalysts also contain internal electron donors, with phthalates being widely used.
Conventional Ziegler-Natta catalysts may be used in conjunction with one or more internal electron donors.
Such catalysts also contain internal electron donors, with phthalates being the most widely used.
Most preferably di-n-butyl phtalate is used as the internal electron donor.
Among these internal electron donor compounds preferred are esters, with phthalic diesters being more preferred.
Specific examples of useful oxygen-containing internal electron donors include organic acids and esters.
Internal electron donors control the stereospecific properties and / or improve the activity of the catalyst system.
When preparing the solid titanium catalyst component, an internal electron donor can be used / added.
In an embodiment, the internal electron donor is diisobutyl phthalate and / or di-n-butyl phthalate.
In such a process, it is dry-comilled together with the internal electron donor.
Preferred aromatic hydrocarbons useful as internal electron donors include benzene, xylene, ethylbenzene, propylbenzene and trimethylbenzene.
The solid titanium catalyst component contains a 1,8-naphthyl diaryloate internal electron donor compound.
One or more internal electron donors ; and / or.
When preparing the solid titanium catalyst component, a 1,8-naphthyl diaryloate internal electron donor is used / added.
Diisobutylphthalate is added as internal electron donor ( about 14 g per g of the magnesium haloethanolate ).
As internal electron donor compounds can be selected among esters, ethers, amines, and ketones.
These catalysts in general also contain internal electron donors, such as phthalates, diethers, or succinates.
The internal electron donor compounds can be selected among esters, ethers, amines, and ketones.
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