Continuous process for preparing copper phthalocyanine

US4009180A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Walter Deucker · Bad Soden am Taunus, DE
• Ernst Spietschka · Idstein, DE
• Dieter Steidl

Key dates

• Filing date: Nov 14, 1973
• Grant date: Feb 22, 1977
• Expiry date: Nov 14, 1993

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B47/067
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A continuous process for preparing copper phthalocyanines by caking a mixture of phthalodinitrile, and a copper salt which comprises carrying out the reaction in a continuously working, heatable, tubular vibration mill, which contains iron or steel bars in the grinding room. In comparison with the continuous processes hitherto known this process requires a considerably smaller amount of thermal energy from outside, since the amount of heat formed in the strongly exothermic condensation process is, to a considerable extent conducted away from the reaction zone, with the aid of heat-conducting grinding bars, and is used in order to heat up the freshly introduced starting product to room temperature.