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Method for preparing light-blue cobalt blue hybrid pigment from aluminum-rich non-metallic minerals

A non-metallic mineral, bright blue technology, applied in chemical instruments and methods, inorganic pigment treatment, inorganic chemistry, etc., can solve problems such as poor chromaticity of cobalt blue hybrid pigments, and achieve excellent dispersion performance and suspension stability , to achieve high-value utilization, bright color effect

Active Publication Date: 2017-05-10
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic clay mineral-based cobalt blue hybrid pigments have poor chromaticity, b* The value is about -30, which is much lower than the commercially available cobalt blue pigment products

Method used

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  • Method for preparing light-blue cobalt blue hybrid pigment from aluminum-rich non-metallic minerals
  • Method for preparing light-blue cobalt blue hybrid pigment from aluminum-rich non-metallic minerals
  • Method for preparing light-blue cobalt blue hybrid pigment from aluminum-rich non-metallic minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Stir and disperse 0.354 g of halloysite in 50 mL of water, add 2.91 g of cobalt nitrate and 7.50 g of aluminum nitrate and stir to dissolve, then slowly drop 8 M NaOH until the pH of the system is 9, and react for 1 h. Directly placed in a tube furnace, crystallized at a high temperature of 1100°C for 1 h to obtain a bright blue cobalt blue hybrid pigment, sample number S1.

Embodiment 2

[0026] Stir and disperse 1.074g bauxite in 50 mL water, add 2.38 g cobalt chloride and 7.50 g aluminum nitrate and stir to dissolve, then slowly drop 8 M NaOH until the pH of the system is 10, and the solid product obtained after reaction for 1 h is washed by centrifugation Afterwards, it was directly placed in a tube furnace, and crystallized at a high temperature of 1200°C for 1.5 h to obtain a bright blue cobalt blue hybrid pigment, the sample number of which was S2.

Embodiment 3

[0028] Stir and disperse 1.416g andalusite in 50 mL water, add 2.38 g cobalt chloride, 1.33 g aluminum chloride and 3.75 g aluminum nitrate and stir to dissolve, then slowly add 8 M NaOH dropwise until the pH of the system is 9, and react for 1 h to obtain After the solid product was washed by centrifugation, it was directly placed in a tube furnace and crystallized at 1100 °C for 1 h to obtain a bright blue cobalt blue hybrid pigment. The sample number is S3.

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Abstract

The invention provides a method for preparing a light-blue cobalt blue hybrid pigment from aluminum-rich non-metallic minerals. The method comprises the following steps: stirring and dispersing aluminum-rich non-metallic minerals in water, adding a Co (II) salt and an Al (III) salt, dissolving by stirring, regulating the pH value of the system to 9-10 with NaOH, carrying out centrifuge washing on the obtained solid product, directly putting the solid product in a tube furnace, and carrying out high-temperature crystallization at 1000-1200 DEG C for 1-2 hours to obtain the product. The introduced aluminum-rich non-metallic minerals are used as the carrier material of cobalt blue nanoparticles to prevent aggregation, and more importantly, participate in the high-temperature crystallization process of cobalt blue, thereby greatly enhancing the chroma of the cobalt blue pigment. The b* value of the obtained hybrid pigment can reach -56; and thus, the hybrid pigment is hopeful to be a high-grade cobalt blue pigment for the fields of high-temperature-resistant paints, ceramics, painting pigments and the like.

Description

technical field [0001] The invention relates to a method for a bright blue cobalt blue hybrid pigment, especially a method for preparing a bright blue cobalt blue hybrid pigment by using aluminum-rich non-metallic minerals, which belongs to the preparation of nano spinel hybrid pigments technology field. Background technique [0002] The solid-phase method is a traditional preparation method of cobalt blue pigments, which generally prepare cobalt blue pigments by calcining cobalt-containing and aluminum-containing compounds at high temperatures. Srisawad et al. CoCl 2 ∙6H 2 O and gibbsite were the cobalt and aluminum sources, respectively, and the cobalt blue pigment was prepared by a low-temperature solid-state reaction ( J. Nanomater. 2012, 2012: 108369). Yoneda et al. used Al(OH) 3 , γ-Al 2 o 3 and α-Al 2 o 3 For different aluminum sources, with Co 3 o 4 Cobalt blue pigment was prepared by mixing and calcining at 1200°C ( Powder Technol. http: / / dx.doi.org / 1...

Claims

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Application Information

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IPC IPC(8): C01G51/00C09C1/00C09C1/40C09C3/04C09C3/06
CPCC01G51/00C09C1/00C09C1/0081C09C1/407C09C3/006C09C3/043C09C3/06
Inventor 牟斌王爱勤李华明汪琴文立新张安杰付燕
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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