Solvay (societe Anonyme)

Solvay

Solvay Sa

Nissan Chemical Corporation

Imerys Sa

Jean-Raphael Caille

Karine Cavalier

Ferdinand Hardinghaus

Eric Fassiau

Bernard Vandenhende

Fernand Gauthy

Jonathan Maunoury

Marc Lacroix

Ardechir Momtaz

Jean-Christophe Lepers

Denis Geets

Gaëlle Rodary

Daniel Gloesener

Karl Köhler

Doinique Bascour

Julien Pineau

Benoît Lefevre

Christian Jourquin

Process for recovering a polymer by injection of steam, and optionally liquid water, into a solution of this polymer comprising a polar aprotic organic solvent (PAOS) that has an azeotrope with water and an apolar organic compound that is miscible with the PAOS and immiscible with water and that acts as a phase separation agent (PSA), the boiling point of which is below that of the water/PAOS azeotrope, the amount of steam injected being sufficient to give rise to the substantial removal of the PSA via stripping and that of the PAOS via azeotropic distillation, and the total amount of water being sufficient to give rise to the precipitation of the polymer, this process being characterized in that the polymer solution also comprises an alcohol, at least during the precipitation of the polymer.

Process for recovering a polymer from a solution

Method for recovering a polymer from a liquid medium () substantially containing the polymer and a solvent for the latter, wherein:

Method for recovering a polymer from a liquid medium

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Namur, Belgium

Jean-Raphael Caille