Versalis S.p.a.

Armando Galeotti

Daniele Delledonne

Alessandro Del Seppia

Nicola Vecchini

Mirko Oliosi

Elena Bencini

Mirco Nodari

Andrea Pisano

A Method for the synthesis of ω-amino acids or derivatives thereof, includes the following steps synthesis of an ω-oxoester/linear acid by hydroformylation by CO/Hmixture of at least one monounsaturated acid/ester, the monounsaturated acid/ester preferably resulting from a reaction of metathesis of oils/fats from renewable sources; synthesis of a linear ω-amino acid/ester and/or ω-aminoamide, subjecting the aforementioned ω-oxoester/linear acid to reductive amination; and possible synthesis of a linear ω-amino acid, subjecting the aforementioned linear ω-aminoester and/or ω-aminoamide to hydrolysis.

Method for the preparation of omega-amino-carboxylic acids and derivatives thereof

Process for the production of 1,3-butadiene comprising: feeding a mixture (a) comprising 1,3-butanediol and water to an evaporator, said water being present in an amount of greater than or equal to 5% by weight, preferably ranging from 10% by weight to 85% by weight, more preferably ranging from 15% by weight to 30% by weight, relative to the total weight of said mixture (a), to obtain: (b) a gaseous stream comprising 1,3-butanediol exiting from the top of said evaporator; and, optionally, (c) a blowdown stream exiting from the bottom of said evaporator; feeding said gaseous stream (b) to a first reactor containing at least one dehydration catalyst to obtain (d) a stream comprising alkenols, water and, optionally, impurities and/or unreacted 1,3-butanediol, exiting from said first reactor; optionally, feeding said stream (d) to a first purification section to obtain: (e) a stream comprising alkenols, water, and, optionally, impurities; (f) a stream comprising water and, optionally, impurities and/or unreacted, 3-butanediol; and, optionally, (f) a stream comprising impurities; feeding said stream (d) or said stream (e) to a second reactor containing at least one dehydration catalyst to obtain (g) a stream comprising 1,3-butadiene, water and, optionally, impurities and/or unreacted alkenols, exiting from said second reactor; feeding said stream (g) to a second purification section to obtain: (h) a stream comprising pure 1,3-butadiene; (i) a stream comprising water and, optionally, unreacted alkenols; and, optionally, (1) a stream comprising impurities. Said 1,3-butadiene may advantageously be used as a monomer or intermediate in the production of elastomers and (co)polymers.

Process for the production of 1,3-butadiene from 1,3-butanediol

An ethylbenzene dehydrogenation plant for producing styrene which comprises a reaction section in which one or more adiabatic reaction apparatuses are positioned in series, and a steam circuit in which there is at least one first steam heat exchange apparatus; said plant being characterized in that it comprises heating equipment in which there is a heating circuit by means of recirculation of the fumes formed during dehydrogenation processes of ethylbenzene to give styrene, wherein said heating equipment comprises the following apparatuses in fluid communication with each other by means of said heating circuit: one or more ultra-heating apparatuses, one or more combustion devices in which at least one steam diffuser, one burner and at least one mixing apparatus are inserted, one or more ventilation device(s).

Ethylbenzene dehydrogenation plant for producing styrene and relative process

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Gonzaga, Italy

Armando Galeotti