Snamprogetti S.p.a.

Enichem Sintesi S.p.a.

Enichimica S.p.a.

Niimsk

Bruno Notari

Vittorio Fattore

Giovanni Manara

Franco Buonomo

Giuseppe Bellussi

Marco Taramasso

Luigi Rivola

Ugo Romano

Mario G Clerici

Antonio Esposito

Alberto Paggini

Giovanni Perego

Vincenzo Lagana

Vincenzo Lagana'

Francesco Ancillotti

Margherita Corbellini

Agostino Balducci

Orfeo Forlani

Vittorio Mormino

Marco Taramasso, Deceased

Rodolfo Jezzi

Gheorghiy R Kotelnikov

Victor A Patanov

Konstantinovic R Michailov

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.

A process for olefin bond isomerization by means of a gamma alumina-based catalyst containing SiO.sub.2 and oxides of a metal chosen from those of Group II A and/or VIII and/or III B and/or Lanthanides, with particular molar ratios between the various oxides. The catalyst is thermally stable, and in the conversion of butene-2 to butene-1 enables butene-1 to be obtained with an isobutene content below the allowable limits for butene-1 grade polymerization.

Olefin bond isomerization process

A catalytic system and process for producing mixtures of methanol and higher alcohols from synthesis gas, the catalytic system comprising zinc, chromium, copper, one or more alkaline metals, and possibly one or more metals chosen from molybdenum, manganese, lanthanium, cerium, aluminium, titanium and vanadium, either all or only part of said elements being chemically bonded to oxygen and/or together.

Catalytic system and process for producing a mixture of methanol and

The invention relates to a method for the preparation of a catalyst for the dehydrogenation of C.sub.3 -C.sub.5 paraffins consisting in impregnating calcined aluminum oxide with a solution of chromium and potassium compounds, in drying and then impregnating the product obtained with a solution of a compound of silicon, the catalyst obtained being finally dried and calcined.

Method for the preparation of a catalyst for the dehydrogenation of C.sub.3

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.

Catalyst of silicon and titanium having high mechanical strength and a

A process for preparing porous crystalline alumino-silicates consisting of bringing into contact, in an aqueous environment, sodium silicate with an aluminum derivative at a molar SiO.sub.2 /Al.sub.2 O.sub.3 ratio greater than or equal to 8, in the presence of one or more alkaline hydroxides at a molar Me.sup.+ /SiO.sub.2 ratio greater than 0.6, where Me.sup.+ represents the alkaline metal or metals, and in the presence of a mineralizing agent, operating at a temperature of between 20.degree. and 100.degree. C., and controlling the molar OH.sup.- /SiO.sub.2 ratio of the resultant mixture at a value of 0.01 and 0.8, the resultant mixture being crystallized at said molar OH.sup.- /SiO.sub.2 ratio in a closed environment for a period of between some hours and 40 days at a temperature of between 100.degree. and 200.degree. C.

Process for preparing ZSM-5, large pore mordenite and ZSM-35

The invention provides a silica-based crystalline material that incorporates titanium into the crystal lattice. A process for preparing this material is also disclosed which is based on the reaction of silica, tetra-alkyl orthotitante and tetrapropyl-ammonium hydroxide.

Silica-based synthetic material containing titanium in the crystal

The invention is concerned with particular crystalline silica materials that contain boron in the crystal lattice. These materials are useful as catalysts for many reactions.

Silica-based synthetic materials containing boron in the crystal lattice

A process for preparing quaternary ammonium hydroxides by electrolysis in an electrolytic cell comprising two compartments, namely an anode and a cathode compartment, separated by an anion exchange permselective membrane, starting from quaternary ammonium halides.

Process for preparing quaternary ammonium hydroxides by electrolysis

A catalytic system and process for producing mixtures of methanol and higher alcohols from synthesis gas, the catalytic system comprising zinc, chromium, copper, one or more alkaline metals, and possibly one or more metals chosen from molybdenum, manganese, lanthanum, cerium, aluminum, titanium and vanadium, either all or only part of said elements being chemically bonded to oxygen and/or together.

Catalytic system for producing mixtures of methanol and higher alcohols

An improved process is disclosed for producing alumino-silicates having a porous structure, of the zeolite class, the process essentially comprising the step of preparing a homogeneous aqueous mixture containing a source of alumina, a source of silica and alkali metal bases and/or alkaline earth metal bases, the improvement consisting in adding to said mixture at least one substance which contains at least a hydroxyl group in its molecule. The advantages are that the use of nitrogenous organic substances, universally used heretofore for the preparation of certain zeolites, can be dispensed with inasmuch as the alkali metal ion is capable, alone, of displaying the counter-ion function.

Method for preparing aluminum-silicate having a zeolite-like structure

This invention relates to a porous crystalline synthetic material constituted by silicon and titanium oxides, a method for synthesizing said material, and the use thereof as a catalyst. Said material is given the name titanium silicalite or TS-1, and corresponds to the following formula:

Preparation of porous crystalline synthetic material comprised of

In the process for dehydrating an aliphatic alcohol to convert same into the corresponding ether, the improvement consisting in that the catalyst is an active alumina on the surface of which a layer of a silicon compound has been deposited. Long life of the catalyst and improved conversion rates are the main advantages.

Method for the preparation of ethers

In the reaction of conversion of nitriles to amides, more particularly, but not exclusively, acrylonitrile to acrylamide, the improvement consisting in the adoption, as a catalyst, of a copper-based catalyst which is prepared by reacting an organic copper chelate with aluminum-alkyl and/or an aluminum hydride. Higher yields and higher selectivity are obtained over the usual copper-based catalysts.

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San Donato Milanese, Italy

Bruno Notari