Process for the delignification and acid bleaching of cellulose with oxygen and hydrogen peroxide

US4626319A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Horst Kruger
• Hans Ulrich Süss · Hasselroth, DE
• Gerhard Arnold · Hanau, DE
• Sigrid Anspach · Großkarlbach, DE
• Ursula Schwartzkopff · Kleinostheim, DE
• Hans Jelitto · Lampertheim, DE

Key dates

• Filing date: Jul 22, 1985
• Grant date: Dec 2, 1986
• Expiry date: Jul 22, 2005

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21C9/10
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process for the delignification and bleaching of cellulose with oxygen and hydrogen peroxide, in which in a given case the delignification is carried out with oxygen in the presence of MgO, and the cellulose subsequently is bleached simultaneously with hydrogen peroxide and oxygen at a pH<5.