Deinking of wastepaper with quaternized hydroxyethyl cellulose

US5286346A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Konrad Engelskirchen · Meerbusch, DE
• Herbert Fischer · Goldkronach, DE
• Klaus Hornfeck · Mettmann, DE
• Doris Oberkobusch · Goldkronach, DE
• Ludwig Schieferstein · Ratingen, DE

Key dates

• Filing date: May 23, 1991
• Grant date: Feb 15, 1994
• Expiry date: May 23, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/64
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for deinking wastepaper in the presence of at least partly water-soluble polymers and/or copolymers containing amino and/or ammonium groups. Two examples of appropriate polymers/copolymers are neutralized polyethyleneimine and quaternized hydroxyethyl cellulose.