Separation of diphasic mixtures containing aromatic polyesters

US4404363A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dieter Freitag · Krefeld, DE
• Volker Serini · Krefeld, DE
• John Goossens · Cologne, DE
• Ludwig Bottenbruch · Krefeld, DE
• Uwe Hucks · Alpen, DE

Key dates

• Filing date: Apr 26, 1982
• Grant date: Sep 13, 1983
• Expiry date: Apr 26, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/89
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Diphasic mixtures obtained from the synthesis of aromatic polyesters by the diphasic interface process may be separated into an aqueous phase and an organic phase by the addition of selected compounds.