C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 11/08 (2006.01) C08J 3/14 (2006.01) C08J 3/16 (2006.01)
Patent
CA 2618207
Method for recovering a polymer from a liquid medium (1) substantially containing the polymer and a solvent for the latter, wherein: (a) this liquid medium (1) is injected into a reactor (2) containing a stirred substantially monophase liquid mixture comprising a major fraction by weight of a non- solvent and a minor fraction by weight of a solvent, the mixture having a composition and temperature such that the polymer precipitates therefrom progressively; (b) the polymer is recovered in the form of particles in suspension (5) in a liquid rich in non- solvent; (c) the polymer particles (9) are separated from the liquid.
L~invention concerne un procédé de récupération d~un polymère dans un milieu liquide (1) contenant essentiellement ce polymère, ainsi qu~un solvant pour ce dernier. Le procédé comprend les étapes suivantes : (a) ledit milieu liquide (1) est injecté dans un réacteur (2) contenant un mélange liquide essentiellement monophasique sous agitation comprenant une fraction majoritaire en poids d~un non-solvant, et une fraction minoritaire en poids d~un solvant, le mélange ayant une composition et une température telles que le polymère précipite progressivement à partir de ce mélange ; (b) ledit polymère est récupéré sous forme de particules en suspension (5) dans un liquide riche en non-solvant ; (c) lesdites particules de polymère (9) sont séparées du liquide.
Caille Jean-Raphael
Fassiau Eric
Lepers Jean-Christophe
Vandenhende Bernard
Robic
Solvay (societe Anonyme)
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