Process for the preparation of cellulose solutions

US5626810A · kind A · utility

Assignee

• LENZING AKTIENGESELLSCHAFT · AT

Inventors

• Stefan Zikeli · Regau, AT
• Peter Hinterholzer · Neumarkt am Wallersee, AT

Key dates

• Filing date: Mar 10, 1994
• Grant date: May 6, 1997
• Expiry date: Mar 10, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2301/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process is disclosed for the preparation of a shapeable solution of cellulose in an aqueous tertiary amine-oxide from comminuted cellulose. The process includes introducing previously comminuted cellulose material into an aqueous solution of a tertiary amine-oxide to prepare an initial suspension, subjecting the initial suspension to high-consistency milling to further break-up the cellulose material to obtain a second suspension, and converting the second suspension into a shapeable solution of cellulose by heating under reduced pressure.