Method for recycling polyesters or polyester mixtures from polyester-containing waste

US7935736B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Andreas Maurer · Zürich, CH
• Udo Knauf · Munich, DE
• Gerd Wolz · Starnberg, DE
• Michael Frankl · Birkenfeld, DE
• Otto Beck · Baiersbronn, DE

Key dates

• Filing date: Apr 13, 2005
• Grant date: May 3, 2011
• Expiry date: May 19, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for recycling polyesters or polyester mixtures from polyester-containing waste, in which the polyester or the polyester mixture is dissolved in a solvent and subsequently free-flowing particles are precipitated herefrom with a precipitant. The precipitant is thereby chosen such that subsequent separation of precipitant and solvent is made possible in a simple manner.