Preparation of azo colorants in microreactors

US6469147B2 · kind B2 · utility

Assignee

• Clariant Finance (BVI) Limited · VG

Inventors

• Uwe Nickel · Bad Homburg vor der Höhe, DE
• Rudiger Jung · Kelkheim, DE
• Klaus Saitmacher · Kriftel, DE
• Leonhard Unverdorben · Uttenreuth, DE

Key dates

• Filing date: Feb 9, 2001
• Grant date: Oct 22, 2002
• Expiry date: Feb 9, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S534/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo colorants are prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotization and the azo coupling reaction in a microreactor.