Recycling materials comprising cellulosic and synthetic fibers

US5521305A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Bernd Huber · Schorndorf, DE
• Gerhard Stein · Kelheim, DE

Key dates

• Filing date: Sep 29, 1994
• Grant date: May 28, 1996
• Expiry date: Sep 29, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

Recycling materials comprising cellulosic and synthetic fibers Described is a process for recycling materials comprising fiber mixtures comprising cellulose fibers, comprising the steps of: i) providing fiber mixtures comprising cellulosic fibers and fibers composed of synthetic polymers, and ii) subjecting these mixtures to a microbial hydrolysis in which the cellulosic fibers are completely degraded. The process makes it possible in particular to separate fiber mixtures. For this, the microorganisms and the hydrolyzate are removed in a conventional manner following step ii), and the remaining synthetic polymers are carried off in a conventional manner to be further recycled.