Les lanciers de Jerez

Patty, James S.; Peyré, Joseph

doi:10.2307/40117653

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Solid Acids1

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1997

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“…Whereas the direct detection of the active centres in solid acids can be extremely difficult (although see below), the use of probe molecules such as pyridine and benzonitrile has shed considerable light on the nature of the acidic centres. Pyridine is the more commonly employed of the two, as it displays a number of IR bands which arise from interaction of pyridine with the solid acid. These bands can be assigned specifically to Lewis acid coordinated pyridine, H-bonded pyridine, and pyridinium ion, allowing differentiation between Lewis and Bronsted sites.…”

Section: Solid Acidsmentioning

confidence: 99%

Heterogeneous Catalysis in Liquid Phase Transformations of Importance in the Industrial Preparation of Fine Chemicals

and

Macquarrie

1997

Org. Process Res. Dev.

123

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This review focuses on the use of heterogeneous catalysts in the production of fine and speciality chemicals. The major emphasis is on those systems which have been commercialised already and those which are close to commercialisation. These include the use of TS-1 for oxidation reactions including the production of hydroquinone, caprolactam, and alkene oxides, and clay-supported catalysts such as clayzic, which are commercially available for acid-catalysed reactions, in particular Friedel−Crafts reactions. Base catalysis and acid-catalysed halogenation and nitration are also covered.

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Section: Solid Acidsmentioning

confidence: 99%