Versalis S.p.a.

Polimeri Europa S.p.a.

Giovanni Regattieri

Dario Ghidoni

Fabio Assandri

Maria Parisi

Tommaso Prando

Gianni Marchetti

Giacomo Gagliardi

Paolo Bottoni

Emanuele Mazzotti

Alessandro Brandolin

The present invention relates to a solidification process of the natural rubber latex by means of polyquaternary polymers. The process of the present invention has the advantage to not require the addition of acids and/or salts, with an evident saving in terms of cost for the reagents. Furthermore, in such a way neither the neutralization step of the rubber nor the treatment of the processing water before their disposal are required. The process of the present invention is suitable both for the continuous and batchwise embodiment, with evident advantages as far as its industrial application is concerned.

Solidification of a natural rubber latex by polyquaternary polymers

The present invention relates to a process for separating natural rubber deriving from non-type plants, in the form of solid crumbs, from solutions in an organic solvent system including it, where said organic solvent system may comprise at least one nonpolar organic solvent, or a mixture of at least one nonpolar organic solvent and at least one polar organic solvent, and the concomitant removal of said organic solvent system from said rubber, where the aforementioned process comprises subjecting said solution to a stripping stage by means of water vapor, in presence of a dispersing system, separating the aforementioned crumbs of natural rubber from the liquid phase, obtained through the stripping stage, and subjecting said crumbs to drying.

Process for separating non-natural rubber in solid form from solutions including it

The present invention relates to a rotor that comprises a series of shaped rotor blades whose circumferential section forms a standard NACA four-digit airfoil. Said rotor can be inserted in a stirring device that also comprises a stator, on whose inner surface shaped stator blades are positioned, whose circumferential section forms a standard NACA four-digit airfoil.

Rotor and stirring device

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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Rodigo, Italy

Giovanni Regattieri