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- Amorphous_silica-alumina abstract "Amorphous silica alumina is a synthetic substance that is used as a catalyst or catalyst support. It can be prepared in a number of ways for example: Precipitation of hydrous alumina onto amorphous silica hydrogel Reacting a silica sol with an alumina sol Coprecipitation from sodium silicate / aluminium salt solutionWater soluble contaminants e.g. sodium salts are removed by washing.Some of the alumina is present in tetrahedral coordination as shown by NMR studies 29Si MASNMR and 27Al NMR Amorphous silica-alumina contains sites which are termed Brønsted acid (or protic) sites,with an ionizable hydrogen atom, and Lewis acid (aprotic), electron accepting sites and these different types of acidic site can be distinguished by the ways in which, say, pyridine attaches. On Lewis acid sites it forms complexes and on the Brønsted sites it adsorbs as the pyridinium ion.Examples of processes that use silica-alumina catalysts are the production of pyridine from crotonaldehyde, formaldehyde, steam, air and ammonia and the cracking of hydrocarbons,".
- Amorphous_silica-alumina wikiPageID "21117094".
- Amorphous_silica-alumina wikiPageRevisionID "557821582".
- Amorphous_silica-alumina hasPhotoCollection Amorphous_silica-alumina.
- Amorphous_silica-alumina subject Category:Catalysis.
- Amorphous_silica-alumina subject Category:Inorganic_silicon_compounds.
- Amorphous_silica-alumina type Abstraction100002137.
- Amorphous_silica-alumina type Cognition100023271.
- Amorphous_silica-alumina type Compound105870180.
- Amorphous_silica-alumina type Concept105835747.
- Amorphous_silica-alumina type Content105809192.
- Amorphous_silica-alumina type Idea105833840.
- Amorphous_silica-alumina type InorganicSiliconCompounds.
- Amorphous_silica-alumina type PsychologicalFeature100023100.
- Amorphous_silica-alumina type Whole105869584.
- Amorphous_silica-alumina comment "Amorphous silica alumina is a synthetic substance that is used as a catalyst or catalyst support. It can be prepared in a number of ways for example: Precipitation of hydrous alumina onto amorphous silica hydrogel Reacting a silica sol with an alumina sol Coprecipitation from sodium silicate / aluminium salt solutionWater soluble contaminants e.g.".
- Amorphous_silica-alumina label "Aluminiumsilicaat".
- Amorphous_silica-alumina label "Amorphous silica-alumina".
- Amorphous_silica-alumina sameAs Aluminiumsilicaat.
- Amorphous_silica-alumina sameAs m.05b_wyz.
- Amorphous_silica-alumina sameAs Q2115367.
- Amorphous_silica-alumina sameAs Q2115367.
- Amorphous_silica-alumina sameAs Amorphous_silica-alumina.
- Amorphous_silica-alumina wasDerivedFrom Amorphous_silica-alumina?oldid=557821582.
- Amorphous_silica-alumina isPrimaryTopicOf Amorphous_silica-alumina.