Examples of 'chromium catalyst' in a sentence
Meaning of "chromium catalyst"
chromium catalyst: The phrase 'chromium catalyst' refers to a type of catalyst that contains chromium and is used to initiate or accelerate a chemical reaction. Chromium catalysts are commonly employed in industrial processes, such as the production of plastics, polymers, and organic compounds. They help facilitate the conversion of reactants into products by lowering the activation energy of the reaction
How to use "chromium catalyst" in a sentence
Basic
Advanced
chromium catalyst
The metal precursor is a chromium catalyst precursor.
Any chromium catalyst known in the art can be used.
It was prepared with a titanated supported chromium catalyst.
Improved chromium catalyst compositions.
A preferred polymerization catalyst is a supported chromium catalyst.
One of these chromium catalyst systems comprises chromium and a support.
Prepared in the gas phase using a chromium catalyst.
Three gram activated chromium catalyst was charged into the tube.
Oxygen is particularly suitable for inactivating a chromium catalyst.
A preferred chromium catalyst is a high surface área unsupported chromium oxide catalyst.
It is an object of this invention to provide chromium catalyst compositions.
A supported chromium catalyst can be prepared according to any method known in the art.
Any support useful to support chromium catalyst can be used.
These chromium catalyst systems comprise a chromium component and a support component comprising silica.
This invention is related to the field of chromium catalyst compositions.
See also
A supported chromium catalyst system can be prepared with any support useful to support a chromium catalyst.
These resins were prepared using commercial chromium catalyst systems.
In some embodiments, the chromium catalyst precursor is an olefin oligomerization catalyst precursor.
According to a preferred embodiment said catalyst is a metallocene or chromium catalyst.
The next was to use their new chromium catalyst to produce an ethylene polymer.
Other suitable catalysts may comprise a metallocene catalyst or a chromium catalyst.
Good results have been obtained with a chromium catalyst supported on a support comprising silica.
Catalyst Systems Catalyst systems used in this invention must be supported chromium catalyst systems.
Acetol was hydrogenated in presence of copper chromium catalyst to form a mixture containing propylene glycol.
In yet another embodiment, said catalyst may be a chromium catalyst.
Polyolefin resins produced using a chromium catalyst also can have a low level of long chain branching.
None of these two components had the broadness of a chromium catalyst polymer.
Generally, the chromium catalyst is activated before being applied in the polymerization reaction.
In a further embodiment the present invention relates to a chromium catalyst prepared by said process.
This chromium catalyst composition comprises at least two chromium catalyst systems,.
The polymer structures produced by the use of the chromium catalyst are uniquely irregular.
The chromium catalyst systems of this invention comprise chromium supported on a silica-titania support.
The high density polyethylene resins contained residual amounts of chromium catalyst and silica support.
Typically, the conventional supported chromium catalyst systems are used in solution polymerization processes.
In another embodiment of the present invention, said catalyst is a chromium catalyst.
Consequently, these poisons inhibit the chromium catalyst from promoting polymerization.
The process of claim 1 wherein said polymerization catalyst is a supported chromium catalyst.
Consequently, these poisons prevent the chromium catalyst from promoting polymerization.
However, chromium catalyst residues are not readily removed and yield colored polymer products.
The way in which the silica-supported chromium catalyst is obtained is not critical.
Said first catalyst comprises a Ziegler-Natta catalyst and said second catalyst comprises a chromium catalyst.
A method for producing a catalyst system characterized by forming a chromium catalyst component on a predominantly silica support ;.
The polyolefin resin is a copolymer polymerized using a Ziegler catalyst, metallocene catalyst or chromium catalyst.
As catalyst, use was made of a chromium catalyst ( silica gel support ).
THF inhibits the polymerization of chromium-based catalyst following the Ziegler-Natta to chromium catalyst transition.
An amount of 104 mg chromium catalyst was weighed into a metal cylinder in a glove box.
Preferably, the second polyethylene resin is produced in the presence of a chromium catalyst in a reactor.
The following chromium catalyst composition was used to copolymerize ethylene and 1-hexene,.
The polyethylene can for example be produced using a Ziegler-Natta catalyst, a chromium catalyst or a metallocene catalyst.
A process for preparing a chromium catalyst having a surface área of at least 50m2/g comprising,.
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