Versalis S.p.a.

Elena Bencini

Francesco Masi

Anna Sommazzi

Giovanni Antonio Fois

Alessandro Casalini

Alessandro Del Seppia

Paolo Calaresu

Roberto Buzzoni

Cristian Gambarotti

Armando Galeotti

Lucio Melone

Loreno Loredano Lorenzoni

Simona Prosperini

Francesco Recupero

Lucio Ronchin

Carlo Punta

Nadia Pastori

Andrea Vavasori

Luigi Toniolo

The invention relates to a new catalytic composition for the alkylation of aromatic compounds with alcohols, or mixtures of alcohols and corresponding olefins, wherein said composition comprises a zeolite of the MTW type and is characterized in that it contains one or more alkaline metals in a total quantity which is less than or equal to 0.02% by weight. The use of said catalyst in the alkylation of aromatic compounds with alcohols, in particular benzene with isopropanol or ethanol, allows the formation, as by-product, of the aldehyde or ketone corresponding to the alcohol used, to be minimized: the formation of reaction by-products of said aldehydes or ketones having a boiling point very close to that of polyalkylation products, is therefore significantly reduced. This provides a considerable advantage in the subsequent transalkylation step for the recovery of said polyalkylates by transformation into the corresponding monoalkylates.

Catalytic composition and process using it for the alkylation of aromatic hydrocarbons with alcohols, or mixtures of alcohols and olefins

Process for the alkylation of aromatic hydrocarbons by means of aliphatic alcohols containing from 1 to 8 carbon atoms, which comprises feeding the hydrocarbon and alcohol to the head of a fixed-bed reactor, operating with 'trickle flow' regime, containing at least one layer of a catalyst comprising a zeolite selected from medium-pore zeolites and large-pore zeolites.

Process for the alkylation of aromatic hydrocarbons with C1-C8 alcohols

Process for the alkylation of aromatic hydrocarbons by means of olefins containing from 2 to 8 carbon atoms, which comprises feeding the hydrocarbon, olefin, and possibly water, to the head of a fixed-bed reactor, operating with a 'trickle flow' regime, containing at least one layer of a catalyst comprising a medium-or large-pore zeolite.

Process for the alkylation of aromatic hydrocarbons with olefins

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Cerese di Virgilio, Italy

Elena Bencini