Process for removing residual solvent from dry-spun filaments

US4124674A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Christian Pieper · Neuss, DE
• Hans Uhlemann · Solingen, DE
• Karlheinz Feltgen · Dormagen, DE
• Klaus-Dietrich Nickel · Frankfurt am Main, DE
• Alfred Nogaj · Dormagen, DE
• Günter Lorenz · Friedrichsdorf, DE

Key dates

• Filing date: Sep 15, 1976
• Grant date: Nov 7, 1978
• Expiry date: Sep 15, 1996

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01D10/06
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for continuously removing residual solvent from filaments of dry-spun acrylonitrile polymers to values of below 2% by weight of solvent by a multi-stage hot-wash with low quantities of water.