High-Temperature-Treated LTX Zeolites as Heterogeneous Catalysts for the Hock Cleavage

Pd–Zeolites as Heterogeneous Catalysts in Heck Chemistry

Heck reactions were performed with 4-bromoacetophenone and n-butyl acrylate, yielding the trans-arylated acrylate ester with high selectivity. Pd–zeolite catalysts were compared with supported Pd metal catalysts. In order to obtain an active and heterogeneous catalyst, the preformed or in situ-formed catalytically active Pd0 species and the PdII intermediates must be sufficiently stabilized on ...

Zeolites as Catalysts for Fuels Refining after Indirect Liquefaction Processes.

The use of zeolite catalysts for the refining of products from methanol synthesis and Fisher-Tropsch synthesis was reviewed. The focus was on fuels refining processes and differences in the application to indirect liquefaction products was compared to petroleum, which is often a case of managing different molecules. Processes covered were skeletal isomerisation of n-butenes, hydroisomerisation ...

Heteroatom-Substituted Delaminated Zeolites as Solid Lewis-Acid Catalysts

Diesel Exhaust Treatment Using Catalysts/Zeolites

Metal-Exchanged β Zeolites as Catalysts for the Conversion of Acetone to Hydrocarbons

Various metal-β zeolites have been synthesized under similar ion-exchange conditions. During the exchange process, the nature and acid strength of the used cations modified the composition and textural properties as well as the Brönsted and Lewis acidity of the final materials. Zeolites exchanged with divalent cations showed a clear decrease of their surface Brönsted acidity and an increase of ...