Snamprogetti S.p.a.

Enichem Sintesi S.p.a.

Eniricerche S.p.a.

Anic S.p.a.

Other

Enichem Synthesis S.p.a

Enitecnologie S.p.a.

Enichimica S.p.a.

Niimsk

Franco Buonomo

Giuseppe Bellussi

Bruno Notari

Mario G Clerici

Rodolfo Iezzi

Antonio Esposito

Ugo Romano

Carlo Neri

Andrea Bartolini

Domenico Sanfilippo

Vittorio Fattore

Emilio Micheli

Aldo Giusti

Bartolomeo Anfossi

Renato Tesei

Gianni Donati

Lorenzo Tagliabue

Gueorgui Kotelnikov

Vladimir Bespalov

Rodolfo Jezzi

Gheorghiy R Kotelnikov

Victor A Patanov

Konstantinovic R Michailov

A process for preparing light olefins from corresponding paraffins consists of reacting said paraffins in a reactor, operating at a temperature of between 450 and 800&#xb0; C., a pressure of between 0.1 and 3 atm absolute and a GHSV of between 100 and 10000 h, with a catalytic system containing gallium, platinum, possibly one or more alkaline or alkaline-earth metals, and a support consisting of alumina in delta or theta phase or in delta+theta or theta+alpha or delta+theta+alpha mixed phase, modified with silica, the gallium, expressed as GaO, being in a quantity of between 0.1 and 33.6 wt %, the platinum being in a quantity of between 1 and 99 ppm, the alkaline or alkaline-earth metals, expressed as oxide, being in a quantity of between 0 and 5 wt %, and the silica being in a quantity of between 0.08 and 3 wt %, the rest to 100% being alumina, and regenerating said catalytic system in a regenerator by burning off the coke which has deposited on its surface, without subsequently reducing it.

Process for preparing light olefins by dehydrogenation of the corresponding paraffins

A process for obtaining light olefins by the dehydrogenation of corresponding paraffins, by reacting the paraffins with a catalytic system containing chromium oxide, tin oxide, at least one alkali metal oxide, and an alumina-silica carrier, and then regenerating the catalytic system in a regenerator by burning coke deposited on its surface at a temperature higher than the average temperature of the reactor.

Process for obtaining light olefins by the dehydrogenation of the corresponding paraffins

Catalytic system and process for dehydrogenating ethylbenzene to styrene

Process for the production of styrene which comprises:

Process for the production of styrene

Catalytic system for dehydrogenating ethylbenzene to styrene, containing chromium oxide, tin oxide, at least one oxide of an alkaline metal (M) and an alumina carrier, in delta or theta phase or in a mixture of delta+theta or theta+alpha or delta+theta+alpha phases, modified with silica, and characterized in that:

Zeolites having a pore diameter comprised within the range of from 5 to 12 .ANG. are bonded with amorphous oligomeric silica, by dispersing them in an aqueous solution of silica and alkylammonium hydroxide, and submitting the obtained suspension to a quick drying.

Bonded zeolites and process for preparing them

The process for activating a catalytic composition for paraffin dehydrogenation containing gallium, alumina, possibly silica and/or one or more alkaline or alkaline-earth metals, comprises thermal activation in air followed by post-activation effected by the following stages:

Process for activating catalyst percursors for the dehydrogenation of

Process for activating catalyst precursors for the dehydrogenation 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 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 catalytic composition for the dehydrogenation of C.sub.2 -C.sub.5 paraffins, constituted by:

Catalytic composition for the dehydrogenation of C.sub.2 -C.sub.5

The invention discloses a catalyst on the basis of silicon and titanium having the form of microspheres and constituted by oligomeric silica and by titanium-silica-lite crystals having an oligomeric silica/titanium-silicalite molar ratio comprised within the range of from 0.05 to 0.11, wherein the crystals of titanium-silicalite are encaged by means of Si-O-Si bridges.

Catalyst on the basis of silicon and titanium having high mechanical

The invention discloses a catalyst on the basis of silicon and titanium having the form of microspheres and constituted by oligomeric silica and by titanium-silicalite crystals having an oligomeric silica/titanium-silicalite molar ratio comprised within the range of from 0.05 to 0.11, wherein the crystals of titanium-silicalite are encaged by means of Si--O--Si bridges.

The present invention relates to a catalyst for the selective decomposition of cumene hydroperoxide, composed of zeolite crystals wherein a portion of the silicon atoms in the crystal lattice of silica is replaced by Al and B. The zeolite crystals are bonded to each other by a siliceous bonding agent which allows the catalyst to assume the shape of mechanically stable microspheres. The invention relates also to a process in which the catalyst is used, and to the related operating conditions.

Catalyst for the selective decomposition of cumene hydroperoxide and

A process for the epoxidation of olefinic compounds, consisting of reacting said compounds with hydrogen peroxide either introduced as such or produced by substances capable of generating it under the reaction conditions, in the presence of synthetic zeolites containing titanium atoms, of general formula:

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San Donato Milanese, Italy

Franco Buonomo