Finishing treatment of pigments in liquid or supercritical CO2

US6358308B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Rudiger Jung · Kelkheim, DE
• Klaus Kund · Langenscheid, DE
• Bernd Nestler · Jena, DE
• Martin Schmidt · Frankfurt am Main, DE
• Leonhard Unverdorben · Uttenreuth, DE
• Rudolf Steiner · Bassersdorf, CH

Key dates

• Filing date: Dec 8, 2000
• Grant date: Mar 19, 2002
• Expiry date: Dec 8, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/54
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention provides a process for aftertreating organic pigments by causing the ground or unground crude organic pigment and liquid or supercritical carbon dioxide to act on one another.