Process for the production of modified carbon black

US6780389B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Alfons Karl · Hanau, DE
• Ralph McIntosh · Hanau, DE
• Werner Kalbitz · Rodenbach, DE
• Horst Kleinhenz · Großkrotzenburg, DE
• Gerd Tauber · Seligenstadt, DE
• Stephan Luedtke · Bad Orb, DE

Key dates

• Filing date: Jul 25, 2002
• Grant date: Aug 24, 2004
• Expiry date: Jul 25, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/11
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of modified carbon black, in which a carbon black dispersion containing carbon black, water and wetting agent, is mixed with an acid, aqueous solution or suspension of a primary amine and then reacted with sodium nitrite solution.