Examples of 'catalyst precursors' in a sentence
Meaning of "catalyst precursors"
Catalyst precursors: Catalyst precursors are substances or compounds that can be converted into catalysts through chemical reactions or processes. They are the precursor materials from which active catalysts are formed, playing a crucial role in initiating or speeding up chemical reactions without being consumed in the process
How to use "catalyst precursors" in a sentence
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catalyst precursors
Heterogeneous catalyst precursors of the invention are supported on a carrier.
This embodiment may be generally used for all catalyst precursors.
Monocycloalkadienyl catalyst precursors are useful single site catalysts precursors.
The preferred dual supported metallocene catalyst system has two metallocene catalyst precursors.
Any of the aforementioned catalyst precursors may include a solvent of crystallization.
Catalyst precursors that incorporate a transition metal and an indenoindolyl ligand are known.
One example involves spray drying to obtain catalyst precursors of particular dimensions.
Additionally catalyst precursors may be less likely to deactivate as a result of environmental exposures.
Hydrotalcites like compounds containing ni, mg and al were used as catalyst precursors.
Add graphite to the catalyst precursors and press the mixture into tablets.
The process of claim 1 wherein there are two metallocene catalyst precursors.
Examples The following catalyst precursors were prepared.
The catalyst precursors may be pro-activated before converting into catalysts.
The resulting oxide-coated bodies are catalyst precursors according to the invention.
The catalyst precursors may be pre-activated before converting into catalysts.
See also
This invention relates to the formation of magnesium-containing particulate catalyst precursors.
Suitable catalyst precursors are selected from precious metal, base metal, or a combination thereof.
Because of these properties, acac complexes are sometimes used as catalyst precursors and reagents.
Such solid chromium oxide / support catalyst precursors are commercially available from a number of producers.
This disclosure relates to, processes for the manufacture of Ziegler-Natta catalyst precursors.
The catalysts and catalyst precursors of the present invention is use in conjunction with a co-catalysts.
Additional optional components of the composition used to form the spray-dried catalyst precursors include,.
For such catalytic use, the dried catalyst precursors typically undergo a sulfurization step before catalytic use.
Prepolymerization is effected in examples 5 and 6 using the prepolymerized catalyst precursors prepared for those examples.
Catalyst precursors can include vanadium compounds, titanium compounds, chromium compounds, and metallocenes.
Chromium oxide compositions containing zinc, their preparation, and their use as catalysts and catalyst precursors.
Employing this general procedure the catalyst precursors of Table 1 were obtained.
Thus, the term " catalyst precursor " is considered to include activated catalyst precursors.
The process of claim 1 wherein the metallocene catalyst precursors are present at 2.0 weight percent.
They designed and synthesised novel ruthenium-based OM catalyst precursors.
The drying profiles of the catalyst precursors in Examples 1 to 3 are shown in Figures 3a and 3b.
General preparative method and particle characterization of spray-dried particulate catalyst precursors of Examples 1-4 . Parameter.
The invention further provides catalyst precursors having surface área of at least about 0.04 m ² / g.
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