Method for mechanochemical preparation of high-performance iron red/clay mineral hybrid pigment

US11767432B2 · kind B2 · utility

Assignee

• LANZHOU INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES · CN

Inventors

• Aiqing Wang · Lanzhou, CN
• Bin Mu · Tempe, US
• Wenbo Wang · Beijing, CN
• Qin Wang · San Jose, US
• Yuru Kang · Lanzhou, CN
• Aiping Hui · Huangyang, CN

Key dates

• Filing date: Jul 12, 2019
• Grant date: Sep 26, 2023
• Expiry date: Apr 26, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/65
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The disclosure relates to a method for mechanochemical preparation of an iron red pigment, which comprise steps: mixing a clay mineral, a soluble iron source and an alkali source in a mill for grinding to obtain a precursor, wherein the ratio of ball to material is controlled at 20-50, the grinding speed is 300-1200 rpm, and the grinding time is 30-360 min; and calcining the precursor at 500-900° C. for 30-120 min to obtain a high-performance iron oxide red/clay mineral hybrid pigment. The iron oxide red/clay mineral hybrid pigment has a bright and beautiful color, high-temperature and acid resistance, and can satisfy requirements for high-performance iron oxide red pigments in fields of paints, inks, ceramics, anti-corrosive coatings, etc. Furthermore the method is a simple process without waste that is environmentally friendly and suitable for industrialized production, thus it is expected to replace existing processes of iron oxide red pigments.