Versalis S.p.a.

Maria Parisi

Dario Ghidoni

Giovanni Regattieri

Piero Maestri

Tommaso Prando

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

A process for the removal of solvent from a polymeric solution including at least one elastomeric polymer. The polymeric solution is subjected to a stripping step by means of water vapor, in the presence of a dispersant system including: from 0.005% by weight to 1% by weight, with respect to the total weight of the dry elastomeric polymer, of at least one lamellar material; from 0.0005% by weight to 1% by weight, with respect to the total weight of the dry elastomeric polymer, of at least one cationic surfactant.

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Ravenna, Italy

Maria Parisi