Basf Aktiengesellschaft

Michael Trefzer

Eugen Gehrer

Thomas Narbeshuber

Georg Heinrich Grosch

Michael Baier

The catalyst comprising at least one alkali metal on a spinel or inverse spinel as carrier may be doped with at least one compound of an alkali metal and/or alkaline earth metal, where the alkali metal/carrier ratio by weight is from 0.01 to 5 and, when a dopant is present, the dopant/carrier ratio by weight is from 0.01 to 5. The spinel therein has formula (I) and the inverse spinel has formula (II)

Catalyst and side-chain alkylation therewith

The catalyst comprises at least one alkali metal on a doped carrier, where the doped carrier can be prepared from at least one zirconium and/or alkaline earth metal compound as carrier and at least one alkali metal compound as dopant and calcining the doped carrier at 350.degree. C. or below, the alkali metal/carrier ratio by weight being from 0.01 to 5 and the dopant/carrier ratio by weight being from 0.01 to 5.

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Otterstadt, Germany

Michael Trefzer