Versalis S.p.a.

Polimeri Europa S.p.a.

Fabio Assandri

Alessandro Del Seppia

Giovanni Regattieri

Elena Ghirardo

Carmelo Vella

Paolo Bottoni

The present invention relates to a process for the production of 1,3-butadiene which comprises the following phases: a) extracting, by means of extractive distillation, in an extraction section, an end-product containing 1,3-butadiene and a raffinate product, starting from mixtures of saturated and unsaturated compounds having from 2 to 10 carbon atoms in the chain; b) sending the raffinate product to a dehydrogenation section; c) dehydrogenating the raffinate product in the dehydrogenation section in the presence of a dehydrogenation catalyst and an inert product so as to form a reaction effluent containing 1,3-butadiene; d) recirculating the reaction effluent containing 1,3-butadiene directly to the extraction section after separating the incondensable compounds.

Process for the production of 1,3-butadiene

Mixing device for two gases/vapours (hereinafter gases) comprising: a) a plurality of tubes arranged in a bundle (), each provided, in its initial portion, with a plurality of side holes (); b) a first feeding system of one of the two gases, comprising a first tubular body () situated on the inlet side of the tubes, and c) a second feeding system of the other gas comprising a second tubular body () that envelopes in a gas-proof way the tube bundle () and at least a portion of the first tubular body (); characterized in that: d) the first feeding system of one of the gases comprises a plurality of fins (), inside the first tubular body (), which allow a uniform distribution of the feeding gas to the single tubes.

Low-pressure-drop mixing device and use thereof in the mixing of two gases/vapours

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Mantova, Italy

Fabio Assandri