Polimeri Europa S.p.a.

Enichem S.p.a

Versalis S.p.a.

Vittorio Arca

Piero Furlan

Angelo Boscolo Boscoletto

Roberto Buzzoni

Laura Meda

Giuseppe Paparatto

Rino D'Aloisio

Giordano De Alberti

Pierluigi Crocetta

Nicola Fracasso

Process for the catalytic hydrodealkylation alone of hydrocarbon compositions comprising C-Calkylaromatic compounds mixed with C-Caliphatic and cycloaliphatic products which, under the reaction conditions, undergo aromati-zation and subsequent hydrodealkylation, which comprises treating said hydrocarbon compositions in continuous and in the presence of hydrogen, with a catalyst consisting of a ZSM-5 zeolite, as such or in bound form, wherein the Si/Al molar ratio in the ZSM-5 ranges from 5 to 100, modified by means of the platinum-molybdenum couple, at a temperature ranging from 400 to 650&#xb0; C., a pressure ranging from 2 to 4 MPa and H/feedstock molar ratio ranging from 3 to 6. The presence of organic compounds containing heteroatoms such as sulphur, nitrogen or oxygen in the feedstock does not at all alter the performances of the catalyst according to the process object of the invention.

Catalytic compositions for the highly selective hydrodealkylation of alkylaromatic hydrocarbons

Process for the catalytic hydrodealkylation alone of hydrocarbons, comprising C-Calkylaromatic compounds, optionally mixed with C-Caliphatic and cycloaliphatic products, which comprises treating said hydrocarbon compositions, in continuous and in the presence of hydrogen, with a catalyst consisting of a ZSM-5 zeolite, as such or in a bound form, wherein the Si/Al molar ratio in the ZSM-5 ranges from 5 to 35, modified with at least one metal selected from those belonging to groups IIB, VIB, VIII, at a temperature ranging from 400 to 650&#xb0; C., a pressure ranging from 2 to 4 MPa and a H/charge molar ratio ranging from 3 to 6.

Process for the catalytic hydrodealkylation of alkylaromatic hydrocarbons

Process for the catalytic hydrodealkylation alone of hydrocarbon compositions comprising C-Calkylaromatic compounds, optionally in a mixture with C-Caliphatic and cycloaliphatic products, including the treatment in continuous of said hydrocarbon compositions, in the presence of water, with a catalyst consisting of a ZSM-5 zeolite as such or in bound form, wherein the molar ratio Si/Al in the ZSM-5 ranges from 5 to 35, modified with at least one metal selected from those belonging to groups IIB, VIB and VIII, at a temperature ranging from 400 to 700&#xb0; C., a pressure of between 2 and 4 MPa, a molar ratio between water and the charge in the feed to the reactor ranging from 0.0006 to 0.16 (i.e. between 0.01 and 2.5% w/w) and a molar ratio H/charge of between 3 and 6.

Process for the selective catalytic hydrodealkylation of alkylaromatic hydrocarbons

A process is described for the activation of zeolitic catalysts containing titanium having the formula: xTiO(1-x)SiOwherein x ranges from 0.0001 to 0.4, which consists in treating said materials with a solution of an ammonium salt of a carboxylic acid and subsequently subjecting them to calcination. The catalysts thus treated have higher catalytic performances with respect to those not treated, in oxidation processes of organic substrates.

Process for the activation of zeolitic catalysts containing titanium and their use in oxidation reactions

The present invention relates to a catalyst consisting of a metal of the VIII group supported on acid activated carbon functionalized with sulfonic groups, a process for the synthesis of hydrogen peroxide from hydrogen and oxygen which uses said catalyst and the use of the hydrogen peroxide solution in oxidation processes catalyzed by titanium-silicalite.

Catalyst, process for the production of hydrogen peroxide and its use in oxidation processes

Process for the production of epoxides by the reaction of at least one olefin and hydrogen peroxide, or a compound capable of producing hydrogen peroxide under the reaction conditions, in the presence of a catalyst consisting of titanium silicalite subjected to ion exchange treatment with metal cations (M.sup.n+) present on the catalyst in a quantity ranging from 0.01 to 1% by weight with respect to the total weight.

Process for the preparation of olefinic epoxides

Process for the production of epoxides by reaction between at least one olefin and hydrogen peroxide, or a compound capable of producing hydrogen peroxide under the reaction conditions, in the presence of a catalyst consisting of titanium silicalite subjected to treatment with organic molecules comprising an amide group substituted on the nitrogen atom.

Growing community of inventors

Chioggia-Venezia, Italy

Vittorio Arca