Eni S.p.a.

Polimeri Europa S.p.a.

Versalis S.p.a.

Guido Spano′

Franco Rivetti

Alberto Cesana

Stefano Ramello

Angela Carati

Roberto Buzzoni

Gianni Girotti

Leonardo Dalloro

Marcello Marella

Carla Lazzari

Fausto Genoni

Process for the production of alkenols comprising the dehydration of at least one diol in the presence of at least one catalyst based on cerium oxide, wherein said catalyst based on cerium oxide is obtained by precipitation, in the presence of at least one base, of at least one compound containing cerium. Preferably, said diol may be a butanediol, more preferably 1,3-butanediol, still more preferably bio-1,3-butanediol derived from biosynthetic processes. Said alkenols may advantageously be used for the production of 1,3-butadiene, in particular of bio-1,3-butadiene.

Process for the production of alkenols and use thereof for the production of 1,3-butadiene

A process for the production of an optically selective coating of a receiver substrate of a suitable material for solar receiver devices particularly suitable for operating at high temperatures, more specifically for receiver tubes of linear parabolic trough, which comprises: deposition of a layer reflecting infrared radiation consisting of a high-melting metal on a heated receiver substrate of a suitable material; annealing under the same temperature and pressure conditions as the deposition of the reflecting layer; deposition on the high-melting metal of one or more layers of metal-ceramic composite materials (CERMET), wherein the metal is W and the ceramic matrix is YPSZ ('Yttria-Partially Stabilized Zirconia'); deposition on the cermet of an antireflection layer; annealing under the same temperature and pressure conditions as the depositions of the cermet and antireflection layers.

Process for the production of an optically selective coating of a substrate for high temperature receiver solar devices and relative material obtained

The present invention relates to a new zeolite having a beta-type crystalline structure, characterized by a distribution of the Lewis acid sites and Br&#xf8;nsted acid sites corresponding to a molar ratio [Lewis sites] [Br&#xf8;nsted sites] equal to or higher than 1.5. This new zeolite is useful in preparation processes of alkylated aromatic hydrocarbons through the alkylation and/or transalkylation of aromatic compounds. The preparation method of the new zeolite is also object of the present invention.

Catalyst and process for the preparation of alkylated aromatic hydrocarbons

A process is described for the preparation of phenol by the hydrodeoxygenation of polyhydroxylated benzene derivatives or by the selective hydroxylation of benzene under depletive conditions, characterized in that the above-mentioned reactions are carried out in the presence of a catalyst based on multi component metal oxides comprising at least one metal selected from the groups VB, VIB, VIII, IB, IIB, IVA, VA.

Process for the preparation of phenol

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Galliate, Italy

Guido Spano′