Reinigung von Polyetherketonketon durch Zentrifugalfiltration

Details

Veröffentlichungs-Nr.

EP3431522

Aktenzeichen

EP17305956

Anmeldetag

18. Juli 2017

Veröffentlichung

18. November 2020

Erteilung

18. November 2020

Rechtsraum

EP

IPC

C08G61/12

Abstract

The invention concerns a method for the manufacture of polyether ketone ketone (PEKK), comprising the steps consisting in: (i) reacting 1,4-bis(4-phenoxybenzoylbenzene) and/or diphenylether with at least one difunctional aromatic acyl chloride, in a reaction solvent and in presence of a Lewis acid, to obtain a product mixture comprising a PEKK-Lewis acid complex; (ii) contacting the obtained product mixture with a protic solvent, so as to form a dispersion that comprises a liquid phase comprising Lewis acid and a solid phase comprising PEKK; and (iii) separating the solid phase from the liquid phase by centrifugal filtration, so as to recover a crude PEKK and a effluent containing Lewis acid, wherein step (iii) comprises a step of centrifugal filtration.

Anmelder

Firma

ARKEMA FRANCE

Land

🇫🇷 Frankreich

Fachgebiete