Process for the manufacture of viscoses

US4342600A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Reinhart Mayer · Kelheim, DE
• Walter Fester · Königstein, DE
• Rolf Kleber · Neu-Isenburg, DE

Key dates

• Filing date: Jan 2, 1981
• Grant date: Aug 3, 1982
• Expiry date: Jan 2, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08B9/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for the manufacture of viscoses from hemicellulose-containing cellulose pulps without requiring dialysis equipment. By addition of substances having a cross-linking or blocking action on the active groups of hemicellulose to the pulp before or during steeping it is possible to reduce the use of NaOH and CS.sub.2 in the manufacture of viscoses. The viscoses so obtained are distinguished by good filterability and low content of compounds causing formation of H.sub.2 S in the spinning process.