Polimeri Europa S.p.a.

Enichem S.p.a

Ausimont S.p.a.

Elena Bencini

Gianni Girotti

Carlo Perego

Carlo Venturello

Claudio Cavallotti

Oscar Cappellazzo

Giannino Pazzuconi

Cristian Gambarotti

Carlo Punta

Francesco Recupero

Armando Galeotti

Gino Goffredi

Eugenio Andreoli

Maria A Sasso

Lucio Melone

Nadia Pastori

Leonardo Trentini

Simona Prosperini

A catalytic composition for transalkylation of aromatic hydrocarbons which contains a zeolite and an inorganic binder and has an extra-zeolitic porosity higher than or equal to 0.7 cc/g for a fraction of pores of which at least 30% have a diameter greater than 100 nanometers. A catalytic composition having a crushing strength not lower than 1.7 kg/mm and an apparent density not higher than 0.5 g/cc. A process for transalkylating polyalkylated aromatic hydrocarbons using a catalytic composition.

Catalytic composition and process for the transalkylation of aromatic hydrocarbons

Process for the preparation of phenol and cyclohexanone which comprises:

Process for the preparation of phenol and cyclohexanone

A catalytic composition is described for the transalkylation of aromatic hydrocarbons comprising a zeolite and an inorganic binder, characterized by an extra-zeolitic porosity, i.e. the porosity obtained by adding the mesoporosity and the macroporosity fractions present in the catalytic composition, higher than or equal to 0.7 cc/g, which is such as to consist for a fraction of at least 30% of pores having a diameter greater than 100 nanometers. These catalytic compositions have a crushing strength not lower than 1.7 kg/mm and an apparent density not higher than 0.5 g/cc. A process is also described for the transalkylation of polyalkylated aromatic hydrocarbons which uses these catalytic compositions.

Process for the production of vinyl aromatic monomers which comprises: a) feeding an aromatic stream and an olefinic stream to an alkylation unit; b) feeding the reaction product coming from the alkylation section to a first separation section; c) recovering the mono-alkylated aromatic hydrocarbon and the heavy bottom product from the first separation section; d) feeding the mono-alkylated aromatic to a dehydrogenation section; e) feeding the reaction product coming from the dehydrogenation section to a second purification/separation section; f) also feeding the heavy bottom product of step (c) to the second purification/separation section; g) recovering a stream consisting of the vinyl aromatic monomer with a purity higher than 99.7 by weight.

Process for the production and purification of vinyl aromatic monomers

A catalytic composition is described for the alkylation and/or transalkylation of aromatic hydrocarbons consisting of beta zeolite, as such or modified by the isomorphous substitution of aluminum with boron, iron or gallium or by the introduction of alkaline and/or earth alkaline metals following an ion-exchange process, and an inorganic ligand, wherein the extrazeolite porosity, i.e. the porosity obtained by adding the mesoporosity and macroporosity fractions present in the catalytic composition itself, is such that a fraction of at least 25% is composed of pores with a radius higher than 100 .ANG., said composition being characterized by a total volume of extrazeolitic pores greater than or equal to 0.80 ml/g.

Catalytic composition and process for the alkylation and/or

Process for the alkylation of aromatic compounds which comprises contacting an olefin with an aromatic hydro-carbon in the presence of a zeolite and under conventional operating conditions, characterized in that the aromatic hydrocarbon, before the alkylation, is: a) treated to eliminate the oxygen dissolved therein; and/or b) percolated through a fixed bed consisting of particles of alumina modified with silver.

Process for the alkylation of aromatic compounds

This invention relates to imido-derivative peroxycarboxylic acids having the formula I: ##STR1## wherein R and R.sub.1, which may be the same or different, represent hydrogen atoms, alkyl groups, or, taken together with the carbon atoms to which they are linked, give rise to a cyclic aliphatic ring, all of them being optionally substituted; the . . . symbol indicates a simple or an olefinic bond; R.sub.2 represents a hydrogen atom, an alkyl group, or an OH group, and n is an integer different from 0; the process for their preparation and their use as bleaching agents.

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Virgilio-Mantova, Italy

Elena Bencini