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Eniricerche S.p.a.

Enitecnologie S.p.a.

Gianluca Bassi

Carlo Perego

Giuseppe Bellussi

Roberto Millini

Giovanni Perego

Giannino Pazzucconi

Gianni Girotti

A catalyst in the form of extruded bodies is disclosed, which consists of an inert binding agent and a catalytically active phase of a silica/alumina gel. The catalyst is particularly active in acid-catalysed reactions.

Extruded catalyst based on silica/alumina gel

Process for the preparation of a micro-mesoporous gel consisting of a silica matrix in which one or more metal oxides are possibly dispersed comprising: (a) subjecting to hydrolysis and gelification a tetra-alkylorthosilicate with an alkyl-trimethylammonium hydroxide having the formula R(CH,),N&mdash;OH, wherein R is selected from n-butyl, n-pentyl, n-hexyl and n-heptyl, possibly in the presence of one or more metal compounds, the molar ratios in this mixture being: R&mdash;OH/SiO,&equals;0-10; R(CH,),N&mdash;OH/SiO,&equals;0.05-0.4; H,O/SiO,&equals;5-40; metal oxides/SiO,&equals;0-0.02; whereas the ratio H,O/R(CH,),N&mdash;OH varies according to the number of carbon atoms in the alkylic chain R as follows: R&equals;n-butyl, H,O/R(CH,),N&mdash;OH<35; R&equals;n-pentyl, H,O/R(CH,),N&mdash;OH<70; R&equals;n-hexyl, H,O/R(CH,),N&mdash;OH<102; R&equals;n-heptyl, H,O/R(CH,),N&mdash;OH<136; (b) subjecting the gel or solid obtained in step (a) to drying and calcination.

Process for the preparation of micro-mesoporous gel

Micro-mesoporous gel consisting of a silica matrix possibly wherein one or more metal oxides selected from transition metals or metals belonging to groups IIIA, IVA and VA are uniformly dispersed, characterized by a monomodal porosity distribution.

Micro-mesoporous gel and process for its preparation

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Milan, Italy

Gianluca Bassi