Eniricerche S.p.a.

Snamprogetti S.p.a.

Agip S.p.a.

Enichem Synthesis S.p.a

Enichem Sintesi S.p.a.

Eniricere S.p.a.

Aldo Giusti

Giuseppe Bellussi

Vittorio Fattore

Stefano Gusi

Franco Buonomo

Laura Zanibelli

Mario G Clerici

Guglielmo Bertolini

Maurizio Brunelli

Antonio Esposito

Giuseppe Braca

Glauco Sbrana

Alessandro Ricci

Anna M Galletii

A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support of gamma-alumina on the surface of which catalytic quantities of silica are deposited. The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.

Dehydroisomerisation catalyst and its use in the preparation of

A crystalline, porous, synthetic material is disclosed, together with its related preparation process. Such a material of zeolitic character, containing silicon, titanium and iron oxides, corresponds, in its calcined and anhydrous state, to the following empi rical formula

Method for production of a coated substrate with controlled surface

A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support gamma-alumina on the surface of which catalytic quantities of silica are deposited. The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.

Dehydroisomerization catalyst and its use in the preparation of

A crystalline, porous, synthetic material is disclosed, together with its related preparation process. Such a material of zeolitic character, containing silicon, titanium and aluminum oxides, corresponds, in its calcined and anhydrous state, to the following empirical formula:

Synthetic, crystalline, porous material containing silicon oxide,

A catalyst active in the polymerization of ethylene or the copolymerization of ethylene with unsaturated monomers consists of a nickel complex catalyst bonded to a polystyrene substrate, and definable by the general formula (I): ##STR1## where R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 have the meanings given in the description. The preparation is described of the catalyst and its use in the polymerization of ethylene and the copolymerization of ethylene with other unsaturated monomers.

Polymerization catalyst, the process for its preparation and its use in

The present invention relates to a process for the oligomerization of light olefins or mixtures thereof, wherein a reaction is brought about between olefins with a carbon number of between 2 and 20 and synthetic zeolites containing silicon, titanium and gallium oxides which in the calcined, anyhdrous state have the following empirical formula:

Process for oligomerizing light olefins

A process is disclosed for oligomerizing light olefins or mixtures thereof, which consists in reacting said olefins, possibly diluted with an inert gas, by means of synthetic zeolites containing oxides of silicon, titanium and iron, having, in their calcined and anhydrous state, the following empirical formula:

Process for oligomerizing light olefins or mixtures thereof

A process is disclosed for oligomerizing light olefins or their mixtures, which consists in reacting said olefins, possibly diluted with an inert gas, by means of synthetic zeolites containing oxides of silicon, titanium and aluminum, which have, in their calcined and anhydrous state, the following empirical formula:

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Lucca, Italy

Aldo Giusti