Examples of 'refractory oxide' in a sentence
Meaning of "refractory oxide"
refractory oxide: a type of oxide compound that is resistant to high temperatures and difficult to melt or fuse
How to use "refractory oxide" in a sentence
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refractory oxide
The binder material is suitably a refractory oxide.
The refractory oxide includes a substantial amount of alumina.
It is in particular preferred to use alumina as refractory oxide.
The preferred porous refractory oxide is amorphous alumina.
A refractory oxide may be prepared by heating the corresponding hydroxide.
Therefore the catalysts advantageously further comprise a refractory oxide.
Without a very strong fixing the refractory oxide becomes detached in plates.
The first refractory oxide is typically a material having a large surface área.
It is also possible to use catalysts based on chromium oxide supported on a refractory oxide.
Refractory oxide materials can be produced relatively easily at fairly low temperatures.
The catalyst suitably further comprises a refractory oxide that serves as binder material.
Fibers of refractory oxide precursors can also be used to form the support.
The support is generally a porous material and usually a porous inorganic refractory oxide.
The refractory oxide is preferably a material which has a large surface área.
A catalyst comprising a support and two or more layers of refractory oxide thereon is known.
See also
Refractory oxide based fibrous ceramic materials functioning at high temperatures are widely used.
The granular support used in the present invention is preferably based on a refractory oxide.
The refractory oxide particles thus become progressively deposited by sedimentation in the texture.
A rhodium compound such as rhodium nitrate or rhodium chloride is added to the refractory oxide.
The amount of refractory oxide in the catalyst may vary within wide ranges.
A wide variety of procedures can be used to combine the molecular sieve and refractory oxide.
The support for the metals can be any refractory oxide or zeolite or mixtures thereof.
Any refractory oxide which does not interfere with the oxidation reaction will provide a suitable support.
Good results have been found using a mixture of titania and silica as refractory oxide material.
The refractory oxide layer deposition methods are in particular PECVD or CVD.
The catalyst suitably further comprises a matrix comprising a refractory oxide that serves as binder material.
If other refractory oxide material is used, then this is silica.
In a preferred embodiment, the carrier is a refractory oxide carrier.
Preferably, the refractory oxide support material is a mixture of ceria and zirconia.
Preferably, the support is a refractory oxide.
Preferred refractory oxide carriers are zeolites with alumina and / or silica as a binder.
A catalyst of claim 8, wherein the refractory oxide comprises an aluminium oxide.
Preferably, however, precursors of these salts are impregnated onto the refractory oxide.
Catalyst according to claim 6, wherein the refractory oxide carrier is fluorinated alumina.
A catalyst composition according to claim 7, wherein the matrix material is a refractory oxide.
Alternatively, the refractory oxide can be precipitated in the presence of the molecular sieve.
In an implementation, this refractory ceramic matrix may be a refractory oxide matrix.
Catalyst according to claim 6, wherein the refractory oxide carrier is zeolite Y with alumina as a binder.
A typical hydroprocessing catalyst contains hydrogenation metals and / or other promoters on a porous refractory oxide support.
The support may further contain a porous, inorganic refractory oxide such as alumina or silica-alumina.
The refractory oxide is preferably SiO 2.
In another preferred embodiment of the invention, the refractory oxide is an aluminum oxide.
It is a refractory oxide such as zirconia, yttrium oxide, or yttried zirconia.
Alumina fibers and by using a slip filled with refractory oxide particles e . g.
Suitable refractory oxide binders are alumina, silica, titania, clay, or mixtures thereof.
Further, alternative forms for the catalyst include refractory oxide honeycomb monolith structures.
The porous, usually amorphous, inorganic matrix generally, consists of at least one refractory oxide.
A thermal barrier according to claim 1, wherein the refractory oxide has a thermal diffusivity lower than 5 mm2 / s.
A composition according to claim 30 wherein the matrix is a refractory oxide.
The proportions of refractory oxide to less refractory oxide vary between 100 and 1.
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